Best Trees for Shade That Transform Your Yard Into a Cool Oasis

The summer sun beating down mercilessly can turn any backyard into a scorching, uncomfortable mess. Pulled shades or umbrellas offer temporary relief but never quite enough, leaving you longing for a natural sanctuary. Without proper tree choices, those spent afternoons stay hot and glaring.

CZ Grain Hybrid Willows shoot up fast, creating a rapid, natural shade wall with minimal fuss. DAS Farms American Red Maples offer towering height and colorful foliage for a stately, enduring canopy.

The D. D. Blanchard Magnolia fills an elegant niche, combining evergreen leaves with fragrant blooms for a tranquil, shaded retreat that lasts year-round.

Shading Your Space with Rapid-Growth and Evergreen Trees

Creating cool, shaded retreats depends on selecting trees that thrive and grow lush canopies. The right shade tree not only reduces heat but also elevates your landscape’s beauty and comfort.

1. CZ Grain 10-Pack Hybrid Willow Trees, Rapid-Growth Shade and Privacy Screeners

Transform your outdoor space swiftly with these hybrid willow trees, known for their remarkable growth speed. Reaching heights of up to 15 feet annually, these trees quickly create a natural shelter that cools and shields your garden.

Designed to thrive in full sun environments, they require only moderate watering and are adaptable across USDA zones 4 through 8. The lush green canopy not only beautifies your yard but also contributes to cleaner air by producing oxygen and filtering pollutants.

CZ Grain ensures each tree is healthy and ready to establish, providing you with low-maintenance greenery that requires minimal effort to flourish. Their attractive appearance makes them a pleasing addition that enhances privacy and comfort in any setting.

Whether you want to create a shaded retreat or a living privacy barrier, these hybrid willow trees respond rapidly to your environment, making your outdoor space welcoming in no time.

Best for: Gardeners and homeowners seeking a quick-growing, eye-catching natural screen to improve shade and privacy in moderate climates.

Pros:

• Exceptionally fast growth rate up to 15 feet per year
• Effective for shade and privacy enhancement
• Adaptable to various climate zones (4 to 8)
• Requires only moderate watering for upkeep
• Produced by CZ Grain with natural, healthy plant stock

Cons:

• May need regular management to control size due to rapid growth
• Preference for full sun limits use in heavily shaded areas

2. DAS Farms American Red Maple Tree 3 Feet Tall – Outdoor Shade & Air Purifier

Position this vigorous tree where you need a splash of cool relief and natural elegance. Its vibrant red and green foliage transforms landscapes while expanding to provide ample shade.

Growing up to 60 feet tall, it delivers significant canopy coverage suitable for a broad range of outdoor spaces. This variety thrives under full sunlight with adaptable soil preferences and regular watering, making it resilient in multiple climates.

Known for being deer resistant and safe for pets, it offers a low-maintenance solution that enhances air quality through natural purification. Delivered at 3 feet tall and ready for immediate planting, it ensures an easy start with detailed guidelines for ideal placement and care.

The robust roots demand direct soil planting, avoiding container transplantation to guarantee health and longevity. With its deciduous nature, anticipate a dormant period in colder months followed by a vibrant spring bloom.

Produced by DAS Farms, this tree balances aesthetics with environmental benefits, creating a cool sanctuary that also improves outdoor air quality.

Best for: Gardeners and homeowners aiming to introduce a stately shade provider that requires balanced care and enriches their yard’s atmosphere.

Pros:

• Produces broad, dense shade ideal for outdoor cooling
• Adaptable to USDA zones 3 through 9 and versatile soil types
• Deer resistant and pet friendly for tranquil environments
• Enhances air quality through natural purification traits
• Delivered live at 3 feet tall, ready to plant with instructions

Cons:

• Requires planting directly in the ground, not suited for container growing
• Deciduous, which means a leafless period during dormancy in colder seasons

3. Generic D. D. Blanchard Magnolia Tree with Fragrant Blossoms and Evergreen Foliage – 3 gal Nursery Pot

Adding a large, elegant tree to your yard can transform the atmosphere, especially when it offers rich, year-round greenery. The D. D. Blanchard Magnolia delivers expansive, glossy foliage that retains a lively hue through colder months, creating a steady backdrop for your outdoor oasis.

Its notable feature is the impressive display of creamy white, fragrant blooms that appear in late spring to early summer, filling the air with a captivating scent. As the tree matures, it reaches a formidable height of 50-60 feet and a broad spread, offering abundant natural shelter.

Designed to thrive in USDA zones 6 through 9, this magnolia prefers acidic, well-draining soil and regular watering, especially during its first year. Once established, it shows moderate drought resistance, making maintenance manageable in various settings.

Pruning in late winter helps maintain its shape, while balanced slow-release fertilization in spring supports healthy growth. The Generic brand pairs this hardiness with stunning aesthetics, ensuring your space gains both function and flair. Enjoy an extended season of lush shade and subtle fragrance that adds both comfort and charm to outdoor living areas.

Best for: Homeowners wanting a stately, fragrant tree that provides lasting greenery and refreshing shade throughout the year.

Pros:

• Rich, evergreen foliage maintains color in winter
• Large, fragrant white blossoms for visual and aromatic appeal
• Grows up to 60 feet with wide canopy for effective shade
• Moderate drought tolerance once established
• Suitable for multiple USDA zones (6-9)

Cons:

• Requires acidic, well-draining soil for best health
• Pruning needed annually to maintain desired shape

4. Arbor Day Foundation Autumn Blaze Maple 1-Gallon Container Vibrant Fast-Growing Shade Tree

Growing a captivating canopy outdoors often calls for more than just any tree. The Autumn Blaze Maple from Arbor Day Foundation takes center stage with its rapid growth of up to two feet per year, establishing a cozy retreat beneath its expanding branches.

Its vivid scarlet foliage in fall elevates your landscape with a seasonal show that’s both eye-catching and refreshing. Adaptable to zones 3 through 8, this tree withstands a range of temperatures, thriving in both colder and warmer climates while providing reliable shade coverage.

Arriving at a manageable height of one to two feet in a sturdy 1-gallon pot, this tree minimizes transplant shock for a smoother transition into your outdoor space. The combination of medium moisture needs and tolerance for both full sun and partial shade offers flexibility to fit various lawn conditions.

By choosing Arbor Day Foundation’s tree, you’re also contributing to reforestation efforts, linking personal growth to environmental impact. The balance of rapid development and striking aesthetics makes it an exceptional choice for revitalizing your yard’s atmosphere.

Best for: Gardeners who desire a fast-growing, colorful tree that quickly provides ample shade and vibrant seasonal interest.

Pros:

• Fast growth rate accelerates shade formation
• Expressive fall color brightens landscapes
• Wide hardiness zone adaptability for diverse climates
• Delivered in a container that reduces transplant stress
• Supports environmental sustainability through Arbor Day Foundation

Cons:

• Unavailable in certain states due to agricultural restrictions
• Requires medium moisture, which might need regular watering in dry areas

5. Generic Nuttall Oak Tree by Simpson Nursery – Sturdy Deciduous Shade Solution, 2-3 ft in 1 Gal Pot

Providing a natural refuge from the sun, this vigorous deciduous tree grows quickly to create a broad canopy of lush greenery. Its distinctive lobed leaves and attractive bark develop into a striking silhouette as the tree matures, offering both beauty and substantial shade.

Thriving best in full sunlight, it adapts well to well-drained, loamy soils with a slightly acidic to neutral pH, making it suitable for many garden environments. Regular watering supports its healthy growth and vibrant appearance throughout the seasons.

Designed for outdoor planting from spring through fall, the oak’s height potential of up to 80 feet means it can effectively shield outdoor spaces without demanding complex maintenance. This tree also enhances biodiversity by attracting pollinators, enriching your landscape beyond its shading benefit.

Simpson Nursery’s offering comes in a convenient 1-gallon container, allowing a strong start for home gardens. Expect a dynamic fall display as the foliage turns vivid shades, enhancing yard aesthetics while providing much-needed relief under its canopy. Experience rapid growth with a tree that balances elegant form and environmental benefits.

Best for: Gardeners aiming to establish a durable, fast-growing tree that serves as a natural cooling spot and visual centerpiece in medium to large landscapes.

Pros:

• Rapid growth rate ensures quick shading benefits.
• Vibrant fall foliage adds seasonal color.
• Attracts pollinators to support local ecosystems.
• Adaptable to various soil types when well-drained.
• Sturdy deciduous structure provides long-lasting shade.

Cons:

• May require consistent watering during establishment.
• Shipping restrictions limit availability in certain states.

6. Florida Foliage American Elm Set of 3 Fast-Growing Large Shade Trees for Outdoor Landscapes

Establishing a broad canopy swiftly, these American Elms offer abundant relief from the midday sun, transforming open yards and streets with their majestic, vase-shaped growth. Their elevated, upright structure allows for seamless integration in expansive spaces where durable shade is essential.

These resilient trees thrive under full sun and comfortably adapt to a wide range of soil types, making them a reliable choice for varied landscape designs. The summer months display their dense, verdant foliage, giving way to a striking golden-yellow palette in the fall, introducing dynamic seasonal beauty to your environment.

Low maintenance and drought-tolerant attributes mean engaging with these trees won’t become a chore. Florida Foliage ensures you receive plants that balance ease of care with impressive stature—qualities that have made American Elms beloved in both public parks and private properties.

Offering a classic look combined with modern adaptability, these trees provide strong shade coverage, rapid growth, and enduring charm. Their potential to anchor any outdoor setting is hard to overlook and extends beyond typical decorative uses.

Best for: Homeowners and landscapers seeking quickly maturing, reliable shade providers that enrich large outdoor areas with appealing, seasonal foliage changes.

Pros:

• Rapid establishment with wide canopy spread
• Thrives in full sun and diverse soils
• Deep green summer leaves with stunning fall color
• Low-maintenance and drought tolerant
• Classic American native with strong structural growth

Cons:

• Requires ample space to mature fully
• May need occasional pruning to maintain shape in tight areas

7. Florida Foliage American Sycamore Large Trade Gallon Size Tree for Rapid Landscape Coverage

Expansive open yards and parks often struggle with finding robust greenery that matures quickly and offers substantial relief from the sun. The American Sycamore answers this need with its broad canopy delivering dense shade, making it an excellent choice for spaces that require swift coverage and cooling.

Recognizable by its striking peeling bark showcasing white and gray hues, this tree maintains visual interest even when foliage is sparse. Its texture adds charm throughout the year, especially in more dormant garden seasons.

Well-suited for full sun environments, this adaptable species thrives across diverse soil types. Its resilience makes it a favored option for both private residences and public green spaces aiming for enduring shade and aesthetic appeal.

Rapid growth is a defining feature, enabling it to be used effectively for privacy enhancement and windbreak purposes in larger landscapes. Being a native to North America, it harmonizes naturally within urban and rural settings, contributing scale and structure without overwhelming existing elements.

Florida Foliage presents this American Sycamore as a landscaping solution for those seeking a dependable, fast-maturing tree that combines functionality with distinct beauty.

Best for: Gardeners and landscapers requiring fast shade creation and visual interest with a resilient, native tree for expansive outdoor areas.

Pros:

• Generous canopy affords excellent sun protection
• Unique, peeling bark adds winter appeal
• Thrives in full sun with varied soil compatibility
• Fast-growing for quick landscape impact
• Effective for privacy and windbreaks in large spaces

Cons:

• Requires ample room to mature fully, limiting use in small gardens
• May need monitoring during establishment to ensure strong root development

8. TriStar Plants Ginkgo Biloba Tree – Sturdy Shade Provider with Vibrant Fall Colors, 1 Gallon

Establishing a serene, shaded spot outdoors often depends on selecting the right kind of tree that grows steadily yet provides significant canopy cover. The Ginkgo Biloba by TriStar Plants gradually matures to impressive heights, creating a cooling retreat beneath its wide, fan-shaped leaves.

Adaptable to a range of soil conditions and thriving in full sun to partial shade, this tree offers reliable drought tolerance once established, reducing maintenance concerns. Its unique foliage turns a striking yellow in autumn, adding a splash of color to your landscape through the seasons.

Watering is essential during the early stages, but as it grows, the need decreases, easing the commitment for your garden care routine. Pruning is minimal and best performed in dormancy, helping maintain the tree’s form without excessive effort.

Although growth is moderate, with an annual increase of 12–24 inches, the payoff comes in a mature tree that can grow up to 80 feet, making it an excellent choice for a substantial shade presence. TriStar Plants has cultivated this specimen with healthy roots for a strong start.

Bold features include its longevity across USDA zones 3 to 8 and the distinctive fan-shaped foliage that stands out from other shade trees.

Best for: Gardeners seeking a durable, long-term shade tree that combines beauty with practical climate adaptability.

Pros:

• Distinctive bright-yellow fall foliage for seasonal interest
• High drought tolerance after establishment minimizes water use
• Suitable for a wide range of soil types and light conditions
• Moderate growth rate allows manageable landscaping planning
• Requires minimal pruning, simplifying upkeep

Cons:

• Growth rate might feel slow for those wanting immediate shade impact
• Needs regular watering initially which requires attention

9. Perfect Plants Southern Live Oak 1 Gallon Pot – Resilient Majestic Shade Tree for Outdoor Landscapes

Transform your outdoor space with a towering tree that casts an expansive green canopy, cooling even the sunniest yards. Known for its incredible longevity, this species can thrive for hundreds of years, providing enduring shelter and visual appeal. Its fast-growing nature means you won’t have to wait long to enjoy ample shade coverage that improves outdoor comfort dramatically.

The robust wood of the Southern Live Oak has a storied past, historically valued for shipbuilding, symbolizing strength and durability. It spreads wide, creating a natural gathering spot with a vast crown that can exceed 100 feet, ideal for shading patios, gardens, and seating areas. Its lush leaves add a rich splash of green, enhancing landscape aesthetics year-round.

Being highly adaptable, this oak tolerates tough conditions such as salty coastal air and compacted soils. This makes it a low-maintenance choice that withstands harsh winds and drought with ease, perfect for homeowners seeking resilience in their greenery. Plus, its seasonal acorn production supports local wildlife, feeding birds and deer alike.

Planting in spring within USDA zones 7–10 fosters robust growth. Moderately moist loam soil encourages healthy development, while full sun exposure ensures the tree flourishes. Perfect Plants delivers this live tree ready to start its journey in your landscape.

Best for: Garden enthusiasts or homeowners aiming for a durable, long-lived natural shade solution in warm to temperate climates.

Pros:

• Exceptional longevity with lifespan up to 500 years
• Wide-spreading canopy offering extensive shade
• Highly tolerant of salt, wind, drought, and compacted soil
• Supports local wildlife through acorn production
• Requires minimal maintenance once established

Cons:

• Not suitable for regions outside USDA hardiness zones 7-10
• Its large mature size requires ample planting space

Top Trees For Shade With Key Growth And Care Specs

Tree Label	Expected Height	USDA Hardiness Zone	Sunlight Exposure	Moisture Needs
CZ Grain Austree Hybrid Willow	180 Inches	4, 5, 6, 7, 8	Full Sun	Moderate Watering
DAS Farms American Red Maple	60 Feet	3 to 9	Full Sun	Regular Watering
Generic D. D. Blanchard Magnolia	80 Feet	6 to 9	Full Sun	Regular Watering
Arbor Day Autumn Blaze Maple	1 to 2 Feet (established)	3 to 8	Full Sun, Partial Sun/Shade	Medium
Generic Nuttall Oak	80 Feet	6 to 9	Full Sun	Regular Watering
Florida Foliage American Elm	Not Specified	Not Specified	Full Sun	Not Specified
Florida Foliage American Sycamore	Not Specified	Not Specified	Full Sun	Not Specified
TriStar Ginkgo Biloba	80 Feet	3 to 8	Full Sun	Requires watering during establishment

Which Factors Matter Most When Choosing the Best Trees for Shade?

Selecting a tree that offers ample shade takes more than just picking the tallest option. Certain characteristics determine how well a tree will serve as a cooling, sheltering presence in your yard or garden. Paying attention to these factors ensures your chosen tree thrives and provides lasting comfort.

Each element—from growth speed to environmental adaptability—impacts how quickly your shaded oasis forms and endures seasonal changes. Understanding these variables leads to smarter choices for your outdoor space’s long-term enjoyment.

Growth Rate: Speeding Up Your Shade Solution

Growth rate defines how quickly a tree achieves a size capable of providing meaningful shade. This factor is critical because a slow-growing tree means waiting years—and sometimes decades—before enjoying cool respite from its canopy.

Tree species like the CZ Grain Hybrid Willow boast rapid growth of up to 15 feet annually, producing fast-developing, dense foliage. Conversely, species like Ginkgo Biloba mature more slowly but offer steady coverage over time. Growth speed depends on cellular division rates in the cambium and nutrient availability in the soil.

Ignoring growth rate can leave your space exposed to harsh sun much longer than necessary. Selecting a fast-growing species aligns expectations with reality, ensuring timely shade coverage and making the tree investment worthwhile.

Canopy Density and Size: Maximizing the Umbrella Effect

A tree’s canopy density and overall size are defining features for effective shade. Branch spread and leaf volume directly influence how much sunlight the tree filters, creating cool zones beneath.

For example, the American Red Maple can grow up to 60 feet tall, producing expansive coverage with vibrant foliage that blocks significant sunlight. Meanwhile, the Autumn Blaze Maple offers vivid seasonal color alongside dense canopy growth reaching up to 2 feet per year. Leaf arrangement and thickness affect shading intensity by intercepting solar radiation, reducing ground temperature.

Choosing trees with sparse or narrow canopies often leads to disappointment in shading quality. Dense, broad canopies deliver meaningful shelter from heat, shading patios, decks, or play areas efficiently.

Sunlight Exposure Needs: Matching Tree to Your Site’s Brightness

Every tree has particular sunlight needs that determine where it will thrive best. Planting a tree that requires full sun in a shady spot—or vice versa—can seriously limit its growth and health. This mismatch ultimately affects the tree’s ability to provide strong, reliable shade.

Many popular shade trees like the Hybrid Willow and American Elm demand full sun to fuel photosynthesis, which drives dense leaf growth and a broad canopy. Meanwhile, species such as the Autumn Blaze Maple handle partial shade well, giving gardeners more flexibility. Chlorophyll in leaves captures sunlight energy, so adequate light exposure is crucial for robust foliage and thick shading.

Ignoring a tree’s sunlight requirements often leads to stunted growth or thin, patchy canopies, leaving you with disappointing shade and wasted effort in your landscape.

Water and Moisture Requirements: Keeping Your Shade Tree Hydrated

Water availability strongly influences tree health and shading ability. Each species holds particular moisture needs, from moderate watering like the Hybrid Willow to regular irrigation required by the American Red Maple.

A tree’s water uptake facilitates nutrient transport, leaf turgidity, and continued expansion of leafy growth. The Hybrid Willow thrives on moderate moisture and adapts across USDA zones 4 to 8, balancing hydration with drought tolerance. Others demand more frequent watering to maintain healthy foliage density. Soil drainage and retention also impact how water supports the tree.

Neglecting water needs results in wilting, leaf drop, and ultimately poor canopy development. Understanding moisture preferences safeguards vibrant shade and extends your tree’s lifespan.

Hardiness Zone Compatibility: Ensuring Survival in Your Climate

Hardiness zones are crucial for choosing trees that thrive in your local climate. These zones, defined by the USDA standards, indicate the coldest temperatures a plant can endure. Picking the right zone means your tree will grow robustly and provide reliable shade year after year.

Take the DAS Farms American Red Maple, which grows well across zones 3 to 9, handling significant temperature swings. In contrast, species like Magnolia prefer zones 6 to 9, favoring milder winters. This hardiness ties to a tree’s ability to protect cells and buds during cold months, influenced by regional soil temperatures and seasonal shifts.

Overlooking zone compatibility can stunt growth or cause winter damage. This results in a weak tree that may fail to shade properly, wasting effort and money. Ensuring your shade tree matches the hardiness zone is essential for a healthy outdoor space.

Maintenance Needs: Balancing Effort with Shade Benefits

Shade trees require varying levels of maintenance, such as pruning, pest control, and soil management. These tasks are crucial because proper upkeep directly impacts the tree’s health and how dense its canopy becomes, which ultimately determines the quality of shade provided.

Certain species like the American Sycamore and Nuttall Oak are prized for their low-maintenance nature once established, needing pruning only occasionally to maintain structure. Others may demand more frequent watering or vigilance against pests. Consistent care supports stronger branches and a lush, thick canopy that creates effective shelter.

Ignoring these maintenance needs can cause thinning limbs, increased vulnerability to disease, and a sparse canopy. This not only reduces the shade benefits but also raises the chance of costly tree damage or replacement.

Aesthetic Appeal and Seasonal Interest: Enjoying Shade with Style

Choosing a shade tree isn’t just about blocking sun; it’s also about adding visual charm to your yard. Features like leaf color, bark texture, and seasonal blossoms make a big difference in how your space feels year-round. A tree that looks great in every season boosts outdoor enjoyment beyond mere shade.

Take the D. D. Blanchard Magnolia with its fragrant white flowers and glossy evergreen leaves. Or the Autumn Blaze Maple, which lights up in vibrant scarlet come fall. The Ginkgo Biloba shows off unique fan-shaped leaves and stands strong against drought. These traits come from specific genetic markers that control color and bloom timing, giving your tree personality and resilience.

Ignoring aesthetic and seasonal qualities means missing out on a tree that enriches your environment. Without this, your shade tree might feel dull or out of place, limiting how much you enjoy your outdoor space.

Frequently Asked Questions

Which tree offers the fastest shade growth?

Hybrid Willow trees from CZ Grain grow at a remarkable pace, reaching up to 15 feet per year, making them ideal for creating quick shade and privacy. This rapid growth is due to their hybrid vigor and adaptability across USDA zones 4 to 8.

For example, the hybrid willow thrives best under full sun with moderate watering, supporting its swift canopy development compared to slower-growing species.

Plant willows in well-drained soil but be mindful of their root systems near foundations or underground utilities.

What type of tree provides year-round greenery with shade?

D. D. Blanchard Magnolia stands out for its evergreen foliage that maintains vibrant green hues through colder months, alongside fragrant white blossoms. This combination offers both continuous shade and visual appeal year-round.

Its tolerance to USDA zones 6 through 9 and preference for full sun exposure make it suitable for warmer climates where persistent greenery is desired.

Ensure consistent watering, especially during flowering seasons, to preserve foliage health and bloom quality.

Are maples good shade trees for diverse climates?

American Red Maple and Autumn Blaze Maple are excellent for providing shade in a wide range of climates, thriving from zones 3 to 9. Their adaptability to various soil types and sunlight levels makes them a versatile choice for many gardeners seeking shade.

The Autumn Blaze Maple grows rapidly, about 1-2 feet annually, and its brilliant fall colors add seasonal beauty in addition to effective canopy coverage.

It’s important to avoid planting maples in waterlogged soils to prevent root rot and to prune regularly for maintaining optimal tree health and shape.

Which shade trees require less frequent watering once established?

Ginkgo Biloba stands out for its strong drought resistance once established, meaning it needs less frequent watering. It grows well in full sun and handles dry spells better than many other shade trees.

This tree is adaptable to various soil conditions and thrives with minimal care. Its unique fan-shaped leaves turn a brilliant yellow in fall, adding beauty while demanding less water.

To help young trees build resilience, water deeply at first, then gradually reduce watering to strengthen their root systems.

How do I choose a shade tree suitable for small or urban yards?

Opt for trees like the American Red Maple or Autumn Blaze Maple, which can be managed through pruning and grow at moderate heights under 60 feet. Their adaptable soil preferences and moderate canopy sizes suit limited spaces.

These maples provide excellent shade without overwhelming confined areas and tolerate urban stressors such as pollution.

Prioritize species labeled for urban tolerance and avoid trees with aggressive roots that might disrupt pavement or underground lines.

Enhancing Your Outdoor Space with Ideal Shade Trees

Choosing the right shade tree variety transforms a simple yard into a cool, tranquil oasis. This selection not only brings natural cooling but also boosts curb appeal and lowers energy bills, making a noticeable difference in your garden’s atmosphere. Whether it’s a fast-growing Hybrid Willow or a stately Nuttall Oak, the right tree becomes a long-term asset for your landscape.

Gardeners seeking fast shade will benefit from Hybrid Willows and American Sycamores, while those who prefer evergreen beauty should consider the D. D. Blanchard Magnolia. Maples like Autumn Blaze are perfect for vivid autumn colors, and Ginkgo Biloba suits dry climates with its unique foliage. Each type matches specific needs and aesthetic goals.

Ensuring proper maintenance is crucial—regular watering and roomy planting sites support healthy growth. Be cautious about overcrowding, which can hinder canopy development. Matching the tree to your yard’s size and climate sets the stage for a flourishing and charming shade solution.

Last update on 2026-05-13 / Affiliate links / Images from Amazon Product Advertising API