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Posted 02/28/2023 in Shrub

Forsythia x intermedia

Forsythia x intermedia: A Burst of Springtime Sunshine

When winter's icy grip begins to loosen and the landscape awakens with the promise of spring, few sights herald the season's arrival quite like the vibrant blooms of Forsythia x intermedia. This deciduous shrub, commonly known as Border Forsythia, is a stalwart symbol of spring, its cheerful yellow blossoms painting the garden with an exuberant burst of color.

Description of Forsythia x Intermedia

Forsythia x intermedia is a hybrid cross between Forsythia suspensa and Forsythia viridissima, resulting in a plant that combines the best traits of both parents. It typically grows to a height and spread of 6 to 10 feet, forming an arching, vase-shaped habit. The branches are adorned with pairs of opposite, lance-shaped leaves that emerge after the flowers. 

But it's the flowers that truly steal the show. Forsythia x intermedia produces an abundance of bright yellow blooms in early spring before the foliage emerges, creating a striking contrast against the dull backdrop of late winter. Each flower consists of four slender petals arranged in pairs along the stem, forming a profusion of blossoms that cascade along the branches like golden waterfalls.

Forsythia x Intermedia Value in the Landscape

Forsythia x intermedia holds immense value in the landscape for several reasons. Firstly, its early bloom time makes it a valuable addition to gardens craving color after the dreary months of winter. As one of the first shrubs to flower in spring, it serves as a beacon of hope and renewal, lifting spirits and signaling the imminent arrival of warmer days.

Additionally, Forsythia x intermedia is incredibly versatile and easy to grow, thriving in a wide range of soil types and tolerating both full sun and partial shade. Its vigorous growth habit makes it ideal for hedging, screening, or as a stand-alone specimen in borders or woodland gardens. Pruning can be employed to maintain its shape and encourage denser flowering.

Beyond its ornamental value, Forsythia x intermedia also offers ecological benefits. Its early flowers provide a vital source of nectar for pollinators such as bees and butterflies, supporting their populations as they emerge from winter dormancy.

Interesting Facts About Forsythia x Intermedia

  • Forsythia is named after William Forsyth, a Scottish botanist who served as the royal head gardener to King George III.
  • The genus Forsythia belongs to the olive family (Oleaceae), which also includes plants like lilacs and olive trees.
  • Forsythia x intermedia is known for its toughness and resilience, tolerating urban pollution and drought once established.
  • In traditional Chinese medicine, the dried fruit of Forsythia suspensa (one of the parent species) is used to treat various ailments, including fever and inflammation.

Forsythia x intermedia stands as a shining testament to the beauty and resilience of nature. Its bright yellow blossoms herald the arrival of spring, bringing joy and hope to all who behold them. Whether planted as a solitary specimen or massed in a hedge, this delightful shrub is sure to brighten any landscape with its radiant charm.

Other Plants You May Be Interested In:

Spirea japonica 'Anthony Waterer'

Nepeta racemosa

About RightPlantz - RightPlantz is your go-to source for all things gardening. RightPlantz grows better gardeners.

Post Details

Latin Name
Forsythia x intermedia
Common Name
Border Forsythia
Planting Zone
Zone 5 Zone 6 Zone 7 Zone 8
Light Condition
Full Sun
Leaf Type
Deciduous
Special Interest
Deer Resistant
Bloom Season
Spring
Flower Color
Yellow
Height
8-10 ft
Spread
10-12 ft
Suggested Uses
Grouping Hedge Shrub Borders Mass
Potential Pests
Although Forsythia x intermedia is fairly pest free, the following insects and diseases could cause problems under the right conditions: Aphids, Scale insects, Spider mites, Leaf spot, Powdery mildew, Rust Twig blight, Crown gall, Verticillium wilt, Phytophthora root rot.

Plant Story

Forsythia x intermedia: A Burst of Springtime Sunshine

When winter's icy grip begins to loosen and the landscape awakens with the promise of spring, few sights herald the season's arrival quite like the vibrant blooms of Forsythia x intermedia. This deciduous shrub, commonly known as Border Forsythia, is a stalwart symbol of spring, its cheerful yellow blossoms painting the garden with an exuberant burst of color.

Description of Forsythia x Intermedia

Forsythia x intermedia is a hybrid cross between Forsythia suspensa and Forsythia viridissima, resulting in a plant that combines the best traits of both parents. It typically grows to a height and spread of 6 to 10 feet, forming an arching, vase-shaped habit. The branches are adorned with pairs of opposite, lance-shaped leaves that emerge after the flowers. 

But it's the flowers that truly steal the show. Forsythia x intermedia produces an abundance of bright yellow blooms in early spring before the foliage emerges, creating a striking contrast against the dull backdrop of late winter. Each flower consists of four slender petals arranged in pairs along the stem, forming a profusion of blossoms that cascade along the branches like golden waterfalls.

Forsythia x Intermedia Value in the Landscape

Forsythia x intermedia holds immense value in the landscape for several reasons. Firstly, its early bloom time makes it a valuable addition to gardens craving color after the dreary months of winter. As one of the first shrubs to flower in spring, it serves as a beacon of hope and renewal, lifting spirits and signaling the imminent arrival of warmer days.

Additionally, Forsythia x intermedia is incredibly versatile and easy to grow, thriving in a wide range of soil types and tolerating both full sun and partial shade. Its vigorous growth habit makes it ideal for hedging, screening, or as a stand-alone specimen in borders or woodland gardens. Pruning can be employed to maintain its shape and encourage denser flowering.

Beyond its ornamental value, Forsythia x intermedia also offers ecological benefits. Its early flowers provide a vital source of nectar for pollinators such as bees and butterflies, supporting their populations as they emerge from winter dormancy.

Interesting Facts About Forsythia x Intermedia

  • Forsythia is named after William Forsyth, a Scottish botanist who served as the royal head gardener to King George III.
  • The genus Forsythia belongs to the olive family (Oleaceae), which also includes plants like lilacs and olive trees.
  • Forsythia x intermedia is known for its toughness and resilience, tolerating urban pollution and drought once established.
  • In traditional Chinese medicine, the dried fruit of Forsythia suspensa (one of the parent species) is used to treat various ailments, including fever and inflammation.

Forsythia x intermedia stands as a shining testament to the beauty and resilience of nature. Its bright yellow blossoms herald the arrival of spring, bringing joy and hope to all who behold them. Whether planted as a solitary specimen or massed in a hedge, this delightful shrub is sure to brighten any landscape with its radiant charm.

Other Plants You May Be Interested In:

Spirea japonica 'Anthony Waterer'

Nepeta racemosa

About RightPlantz - RightPlantz is your go-to source for all things gardening. RightPlantz grows better gardeners.

Special Care Instructions

Special Care Instructions for Forsythia x intermedia

While Forsythia x intermedia is generally low-maintenance and hardy, providing the right care ensures it thrives and produces an abundance of vibrant blooms each spring. Here are some special care instructions to help you cultivate a healthy and beautiful Forsythia x intermedia:

Planting Location: Choose a location that receives full sun to partial shade. Forsythia x intermedia prefers well-draining soil but can tolerate a wide range of soil types, including clay and sandy soils.

Watering: Water newly planted Forsythia x intermedia regularly to establish a strong root system. Once established, it is somewhat drought-tolerant but benefits from occasional watering during prolonged dry spells, especially in hot climates.

Pruning: Prune Forsythia x intermedia immediately after flowering to shape the shrub and promote new growth for the following year's blooms. Remove any dead, damaged, or crossing branches, and thin out crowded growth to improve air circulation.

Fertilizing: Apply a balanced fertilizer in early spring before new growth emerges to provide nutrients for vigorous growth and flowering. Follow the manufacturer's recommendations for dosage and application method.

Mulching: Apply a layer of organic mulch, such as wood chips or compost, around the base of the shrub to help retain moisture, suppress weeds, and regulate soil temperature. Mulching also contributes organic matter to the soil as it decomposes.

Pest and Disease Management: Keep an eye out for common pests such as aphids, scale insects, and spider mites, especially during the growing season. Use insecticidal soap or horticultural oil to control infestations as needed. Additionally, monitor for signs of fungal diseases like powdery mildew and rust, and promptly remove affected plant material to prevent the spread of infection.

Winter Protection: Forsythia x intermedia is generally hardy in USDA hardiness zones 5 to 8, but extreme cold or fluctuating temperatures can damage flower buds. Consider providing winter protection in colder regions by covering the shrub with burlap or a frost blanket during periods of severe cold or frost.

Propagation: Forsythia x intermedia can be propagated from semi-hardwood cuttings taken in late spring or early summer. Prepare the cuttings by removing the lower leaves, dip the cut end in rooting hormone, and plant them in a well-draining rooting medium. Keep the cuttings moist and provide bottom heat to encourage root formation.

By following these special care instructions, you can enjoy the beauty and resilience of Forsythia x intermedia in your garden for years to come. With proper care, this charming shrub will continue to brighten your landscape with its golden blossoms each spring.

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