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The Botanical Diary/Encyclopedia/Forsythia × intermedia
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Shrubs

Forsythia × intermedia

Forsythia × intermedia
Also known asforsythia, golden bells

Flowers every spring on the previous year's shoots—do not prune in summer.

Regions
all regions
Colour
Яскраво-жовтий
Forsythia × intermedia (forsythia, golden bells)
🌸
Bloom
March–April
☀️
Light
Full sun / напівтінь
💧
Watering
Moderate
📏
Height
1,5–3 m
❄️
Hardiness
Zone 5b

Forsythia × intermedia is one of spring's first harbingers in the garden, captivating gardeners with a golden wave of flowers before leaves even appear. This hybrid, created by crossing European and Chinese forsythia species, proved to be the most adaptable to temperate climates. Its popularity is well-deserved: the plant is undemanding in growing conditions, produces abundant blooms year after year, and fits into compositions of any style—from formal gardens to natural corners.

This shrub's structure is highly decorative: long, flexible branches in March–April become covered with small bright yellow flowers, which bloom on previous year's shoots before the plant leafs out. In time, linear dark green leaves appear and maintain their ornamental appeal until autumn. Plant breeders have developed numerous cultivars with varying flower shades—from pale yellow to brilliant gold, and some varieties even produce double flowers.

In the garden, forsythia works wonderfully as a specimen plant, but truly shines in group plantings—particularly alongside lilac, spirea, or early-flowering trees. It requires no special care: moderate watering, sunny or semi-shaded location, any soil type. The key is remembering to prune: remove one-third of old branches immediately after flowering to achieve a denser and fuller shrub the following year.

Anyone who has ever seen forsythia in full bloom cannot do without it in their garden. It is a symbol of that miraculous moment when nature awakens from winter's sleep, and this moment is worth celebrating every year right at your doorstep.

Location & soil

Forsythia × intermedia — planting & location

LightFull sun / напівтінь
Soil typeany, рН 6–8
Planting timeOctober або April
Plant spacing1,5–2,5 m
Planting depthAt root collar level

First shrub to flower in spring—still without foliage.

Water needs

How to water Forsythia × intermedia

IntensityModerate
FrequencyEvery 2 weeks
Volume15–20
MethodAt the base

Moderate watering.

Annual care

Fertilizing and pruning: Forsythia × intermedia

Spring fertilizingNitrogen (April).
Summer fertilizingPhosphorus-potassium (July).
Autumn fertilizingDo not fertilise.
Pruning timeОдразу після цвітіння (no later)
Pruning typeShaping + санітарна

Remove one-third of old stems at ground level.

Cold hardiness

Forsythia × intermedia — winter hardiness & care

Hardiness zoneZone 5b
Winter coverHorticultural fleece (young plants).
Cover timingNovember
Plant protection

Diseases and pests of Forsythia × intermedia

Diseases
Brown rotBacterial canker
Pests
Rarely
Garden design

What grows well with Forsythia × intermedia?

Lilac, Spirea, дерен