Greenstem Forsythia (Forsythia Viridissima ‘Bronxensis’)

Plant: Table of Contents

All About Greenstem Forsythia (Forsythia viridissima ‘Bronxensis’)

In this comprehensive guide, we will delve into the fascinating world of Forsythia viridissima ‘Bronxensis’ or more commonly known as Greenstem Forsythia. This beautiful plant is a beloved addition to many gardens and landscapes, and for good reason. With its vibrant flowers and easy-care nature, the Greenstem Forsythia has become a staple in many horticultural settings. Whether you are a seasoned gardener or just starting out, this guide will provide you with all the essential information you need to cultivate and nurture this remarkable plant.

What is Greenstem Forsythia (Forsythia viridissima ‘Bronxensis’)?

Forsythia viridissima ‘Bronxensis’ is a cultivated variety of Forsythia, a genus of flowering plants in the olive family Oleaceae. It is a deciduous shrub that is primarily grown for its stunning display of bright yellow flowers in early spring. The ‘Bronxensis’ cultivar is known for its distinctive green stems, which provide visual interest even when the plant is not in bloom.

With a moderate growth rate, this shrub typically reaches a height and spread of 4 to 6 feet, creating an appealing presence in the landscape. Its arching, spreading form makes it an excellent choice for borders, hedges, or standalone ornamental plantings.

Key Takeaways – Forsythia viridissima ‘Bronxensis’

Before we delve deeper into the specific aspects of caring for Greenstem Forsythia, let’s take a moment to highlight the key takeaways of this remarkable plant:

  • Flowering: Known for its prolific display of yellow flowers in early spring, the Greenstem Forsythia adds a burst of color to the garden.
  • Green Stems: The ‘Bronxensis’ variety is characterized by its unique green stems, providing year-round visual appeal.
  • Easy Care: With minimal maintenance requirements, this shrub is an excellent choice for both beginner and experienced gardeners.
  • Versatile: Suitable for various landscaping applications, including borders, hedges, mixed shrub borders, and container gardening.

Now, let’s embark on a detailed exploration of the cultivation, care, uses, and benefits of growing Forsythia viridissima ‘Bronxensis’.



  • Ornamental: The Greenstem Forsythia is primarily cultivated for its ornamental value, adding beauty and charm to gardens, parks, and landscapes.
  • Wildlife Habitat: The dense growth habit of Forsythia provides valuable cover and nesting sites for small birds and other wildlife, making it a beneficial addition to wildlife-friendly gardens.


Proper watering is essential for the health and vitality of Greenstem Forsythia. While it is relatively drought tolerant once established, regular watering is crucial during periods of extended dryness, especially in the first few years after planting.

  • Establishment: Newly planted Greenstem Forsythia should be watered deeply and consistently to encourage healthy root establishment.
  • Mature Plants: Once established, moderate watering is generally sufficient, and the plant can tolerate short periods of drought.


Greenstem Forsythia thrives in full sun to partial shade conditions. A minimum of 6 hours of direct sunlight is recommended for optimal flower production and overall plant vigor. However, it can also tolerate partial shade, particularly in regions with hot summers.


Applying a balanced fertilizer in early spring can promote healthy growth and abundant flowering. A general-purpose, slow-release fertilizer can be used, following the manufacturer’s recommendations for application rates and methods.

  • Avoid Over-fertilization: Excessive fertilization can lead to lush foliage growth at the expense of flower production, so it is important to use fertilizers judiciously.


Greenstem Forsythia is adaptable to a range of soil types but thrives in well-draining, slightly acidic to neutral soils. It can tolerate clay, loam, or sandy soils, provided they are not excessively wet or compacted. Prior to planting, amending the soil with organic matter can improve its overall texture and fertility, enhancing the conditions for healthy growth.


Pruning is an essential aspect of Greenstem Forsythia care, serving to maintain a pleasing shape, promote flowering, and manage overall plant size. The best time to prune Forsythia is soon after it has finished flowering, typically in late spring or early summer.

  • Flower Production: Pruning immediately after flowering allows the plant to set buds for the following year, maximizing the next year’s floral display.
  • Thinning and Shaping: Regular pruning can help to remove dead or damaged wood, thin out crowded growth, and shape the plant to maintain its natural form.


Greenstem Forsythia can be propagated through several methods, including:

  1. Softwood Cuttings: Softwood cuttings taken in early summer can root relatively quickly under optimal conditions, producing new plants that retain the desirable traits of the parent.
  2. Division: Division of established plants can be a simple and effective way to propagate Forsythia, particularly during the dormant season.


While Greenstem Forsythia is commonly grown in the ground, it can also thrive in containers under the right conditions. When choosing a container for Forsythia, opt for a large pot with adequate drainage holes to prevent waterlogging. Using a well-draining potting mix and placing the container in a sunny location can help ensure the plant’s success in a containerized environment.


The Greenstem Forsythia, with its vibrant flowers and distinctive green stems, has maintained enduring popularity among gardeners and landscapers. Its reliable performance, ease of cultivation, and versatility in various settings have contributed to its widespread appeal.

Common Diseases

Greenstem Forsythia is generally resistant to most pests and diseases when provided with suitable growing conditions. However, there are a few issues to be mindful of, including:

  • Leaf Spot: Fungal leaf spot diseases can occur in overly wet or humid conditions, leading to the development of dark spots on the foliage.
  • Powdery Mildew: Under certain environmental conditions, Forsythia may be susceptible to powdery mildew, characterized by a white, powdery growth on the leaves and stems.

Disease Diagnosis

Diagnosing diseases in Greenstem Forsythia involves careful observation of the plant’s symptoms, including leaf discoloration, spots, or unusual growths. If disease is suspected, it is recommended to seek guidance from local extension services or professional horticulturists to accurately identify the issue and determine appropriate management strategies.

Common Pests

While relatively resistant to pests, Greenstem Forsythia may encounter occasional pest pressures, including:

  • Aphids: These small insects can cluster on new growth and tender shoot tips, causing distortion and potential damage to the plant.
  • Scale Insects: Scale insects can infest Forsythia, feeding on plant sap and causing yellowing of the foliage.

Botanist’s Tips

To ensure the best possible performance and longevity of Greenstem Forsythia in your garden or landscape, consider the following tips from plant experts and botanists:

  • Prune Wisely: Proper pruning practices can enhance the plant’s health and form, so take care to prune at the correct time and in a manner that promotes natural growth.
  • Monitor for Pests and Diseases: Regular monitoring and timely intervention can help prevent pest and disease issues from escalating, preserving the plant’s vitality.

Fun Facts

  • The genus name Forsythia pays homage to William Forsyth, a distinguished Scottish botanist.
  • Greenstem Forsythia is often one of the first plants to bloom in early spring, heralding the arrival of the season with its vibrant yellow flowers.

Links to External Resources

For additional information on Greenstem Forsythia care, propagation, and landscaping uses, consider exploring the following resources:

  1. The American Forsythia Society
  2. Royal Horticultural Society – Forsythia Care
  3. University of Illinois Extension – Forsythia Maintenance

In conclusion, Forsythia viridissima ‘Bronxensis’ or Greenstem Forsythia is a treasured addition to any garden or landscape, offering vibrant color, distinctive green stems, and ease of care. By understanding and applying the best practices for cultivation and maintenance, you can enjoy the beauty and benefits of this remarkable shrub in your outdoor spaces. Whether used as a focal point, hedge, or border plant, the Greenstem Forsythia is sure to make a lasting impression with its early spring display and year-round visual appeal.

Remember, a little care and attention can go a long way in nurturing this exceptional plant, and the rewards of its breathtaking blooms and graceful presence are well worth the effort.

Picture of Peter Taylors

Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.