Flying Machine® (Forsythia koreana). Photo by Proven Winners.

A true sign of spring, forsythia is one of the first shrubs to bloom, providing a burst of color when gardeners need it most. The bright yellow flowers often start blooming even when there’s still snow on the ground. This versatile plant can be used in a variety of ways, from a singular focal point to hedging or foundation plantings.

This tough deciduous shrub thrives in a wide range of conditions, and can be grown in most regions. Hardier varieties are recommended in northern climates where flower buds may be damaged from extreme cold or temperature fluctuations. Newer cultivars have been bred for compact stature more suitable to urban lots, as well as unusual foliage and colored stems that lend multi-seasonal interest in the landscape.

On this page: Basics | Planting | Care & Maintenance | Forsythia Pictures | Design Ideas | Forcing Branches to Bloom

FORSYTHIA BASICS

Zones:

3-9

Height/Spread:

Upright arching habit, 1 to 20 feet tall and 3 to 10 feet wide

Exposure:

Full sun to partial shade; blooms most in full sun.

Bloom time:

Early-mid spring

Color and characteristics:

This deciduous shrub is grown primarily for the bright yellow flowers that bloom the length of the branches in early spring before the foliage appears. Leaves are green or variegated, and pointed with a serrated edge. Fall foliage is generally insignificant, though it can take on purple, red, or yellow tinges. Forsythia is tolerant of urban conditions such as air pollution and salt.

Toxicity:

All parts of forsythia are non-toxic to dogs and cats. (See more plants that are safe for pets.)

PLANTING INSTRUCTIONS

When to plant:

Plant during milder months of spring or fall to avoid heat or cold stress.

Where to plant:

Choose a sunny to lightly shaded site with fertile, well-draining soil that will stay evenly moist.

How to plant:

Loosen soil and work in compost. Remove plant from container and gently tease out roots or slice the rootball in several places if potbound. Dig a hole twice as wide as the rootball and deep enough so the top of the rootball is slightly above or level with the surrounding soil surface; avoid planting too deep. Backfill the hole, gently tamp down soil around the base and water well. Spacing depends on the variety; allow for adequate air circulation for healthy plants.

CARE & MAINTENANCE

Pruning:

Forsythias are fast-growing and require regular pruning to retain an attractive appearance. They are best pruned in a way that retains their natural arching shape.

  • Forsythia plants bloom on old wood and should be pruned just after flowering to preserve next year's blooms.
  • Annually: Remove dead branches and shape as needed after flowering.
  • Every 2 to 3 years: Before plants break dormancy in late winter, thin out 1/4 to 1/3 of the oldest stems, cutting back to the ground to open up the plant and improve air circulation.
  • Trimming the stems only part way down will result in new branching just below the cut, causing overly dense foliage, with flowers only occurring at the tips.
  • Pruning or shearing them into a hedge will often result in a loss of flowers and the resulting dense growth habit may also increase the risk of fungal disease.
  • Overgrown plants can be rejuvenated by lopping the entire plant to several inches above the ground.

Soil:

Forsythias prefer well-draining soil amended with rich organic matter, though they are tolerant of a wide range of soil conditions. Ideal pH ranges from 6.8 to 7.7, from neutral to slightly alkaline.

Amendments & fertilizer:

When soil is properly amended and maintained, forsythia needs little to no supplemental fertilizer. If desired, apply a slow-release fertilizer that’s formulated for trees and shrubs in early spring. Spread fertilizer around the root zone according to instructions and water in thoroughly. Mulch with 1 to 2 inches of organic matter to retain moisture and suppress weeds.

Pests and diseases:

When planted in optimal conditions, forsythia exhibits few, if any problems. Possible fungal diseases include phomopsis gall, twig blight, anthracnose, leaf spot and yellow leaves. Pests include aphids, tarnished plant bug, Japanese weevil, and nematodes. To discourage problems, keep areas around plants clean, provide good air circulation, and minimize overhead watering.

Deer resistance:

Deer will leave forsythia alone for the most part, though extreme conditions can result in deer grazing on plants they wouldn’t otherwise. See more deer-resistant plants for your garden.

FORSYTHIA VARIETIES

Swipe to view slides

Photo by: Proven Winners

Show Off® (syn. ‘Mindor’) — Buy now from Proven Winners
Forsythia x intermedia

Zones:

5-8

Height/Spread:

Upright vase-shaped habit, 5-6 feet tall and wide

Exposure:

Full sun to partial shade

Color:

Golden yellow flowers, green foliage

Prolific flowers bloom the entire length of the stems. Branches remain upright rather than arching like many others. Requires minimal pruning and the compact size is ideal for containers, as low hedging, or massed in the landscape.

Photo by: Proven Winners

Show Off® Sugar Baby® (syn. ‘Nimbus’) — Buy now from Proven Winners
Forsythia hybrid

Zones:

5-8

Height/Spread:

Dwarf vase-shaped habit, 18 to 30 inches tall and wide

Exposure:

Full sun to partial shade

Color:

Golden yellow flowers, green foliage

This miniature variety needs little to no pruning and produces a prolific display of blooms. Can be grown in containers, as low hedging along a pathway, or planted at the front of a mixed border. Dark green foliage stays lush all summer.

Photo by Spring Meadow Nursery.

‘Lynwood Gold’ (syn. ‘Lynwood’, ‘Lynwood Variety’)
Forsythia x intermedia

Zones:

6-9

Height/Spread:

Upright spreading habit, 6 to 9 feet tall and wide

Exposure:

Full sun to partial shade

Color:

Yellow flowers, green foliage

An old reliable standby, this larger shrub can be used as a striking focal point in the landscape, as hedging, screening or in mass plantings. Fall color is green tinged with burgundy and purple.

Photo by: mikluha_maklai / Shutterstock

Weeping Forsythia
Forsythia suspensa

Zones:

6-8

Height/Spread:

Upright weeping habit, 6 to 10 feet tall and wide

Exposure:

Full sun to partial shade

Color:

Yellow flowers, green foliage

Flowers are slightly smaller and not as profuse. The graceful, weeping stems can root when they touch the ground. Grow as a specimen plant, as hedging, naturalize in a woodland setting, or site along banks or slopes.

Photo by Spring Meadow Nursery.

Gold Tide® (syn. ‘Courtasol’)
Forsythia hybrid

Zones:

5-9

Height/Spread:

Compact spreading habit, 1 to 2 1/2 feet tall and 3 to 4 feet wide

Exposure:

Full sun to partial shade

Color:

Lemon yellow flowers, light green foliage

This dwarf form, noted for its low spreading habit, can be used as a groundcover along a slope for erosion control. Suitable for small urban yards, containers, or naturalize in a woodland setting.

Photo by: Daniel Fortin / Millette Photomedia.

‘Northern Gold’
Forsythia x intermedia

Zones:

3-9

Height/Spread:

Upright bushy habit, 6 to 8 feet tall and 5 to 7 feet wide

Exposure:

Full sun to partial shade

Color:

Golden yellow flowers, dark green foliage

Exceptionally sturdy in northern climates, exhibiting bud hardiness to -30 degrees F. This medium-sized variety is useful as a focal point, hedging, or screening.

Photo by Spring Meadow Nursery.

‘Kumson’ Korean Greenstem Forsythia
Forsythia viridissima var. koreana 'Kumson'

Zones:

4-8

Height/Spread:

Upright arching habit, 4 to 6 feet tall and 4 to 8 feet wide

Exposure:

Full sun to partial shade

Color:

Golden yellow flowers, green and silver variegated foliage, burgundy stems

Year-round interest makes this a unique standout in the landscape. Buttery yellow flowers in early spring give way to striking dark green foliage with silver veining. After the leaves drop in fall, deep purple stems are revealed to become a winter accent.

Photo by Spring Meadow Nursery.

‘Fiesta’
Forsythia x intermedia

Zones:

5-8

Height/Spread:

Upright compact habit, 3 to 5 feet tall and wide

Exposure:

Full sun to partial shade

Color:

Yellow flowers, green and yellow variegated foliage, red stems

Golden yellow flowers are followed by showy non-serrated leaves with a creamy yellow center and green margins. The red stems become more noticeable after the leaves drop in fall, adding winter interest to the garden. The compact stature is suitable for smaller yards.

DESIGN IDEAS

There are many ways to incorporate forsythia into your landscape. Here’s how:

  • Plant in the middle or back of a mixed border where the neutral green foliage lends a backdrop to plants with flowers or colored foliage.
  • Plant a larger variety as hedging along a property line for privacy.
  • Place a small to medium-sized variety along your home’s foundation in combination with other flowering shrubs such as azalea, abelia and bluebeard that bloom at different times throughout the growing season for continuous color.
  • Naturalize larger specimens in a woodland border that can be seen from inside your home. Add bulbs such as species crocus and narcissus that will bloom at the same time and multiply over time.
  • Mass a groundcover type along a bank or slope for erosion control.
  • Site a variegated form at the end of a pathway for a compelling focal point that will draw your eye through the landscape in all seasons.

HOW TO FORCE FORSYTHIA BRANCHES INTO BLOOM

Photo by Proven Winners.

Forsythia branches can be cut and brought indoors, even in the bud stage. Here’s how to get the most out of your late winter bouquet.

  • Choose branches with plump buds 2 to 4 weeks before normal bloom time.
  • Cut branches at least 12 to 18 inches long at a 45-degree angle to help stems absorb water.
  • Trim off lower flower buds and side shoots that would sit below water level.
  • Place branches indoors in a vase with lukewarm water and set in a bright location near a window.
  • Change water every few days to keep bacteria from forming, which can cause branches to rot.
  • Flowers may take from several days to a couple of weeks to open.

RELATED:
Shrubs 101
Best Flowering Shrubs for All-Season Color

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