Forsythia: Weather Folklore, History, Care, and the Spring Bloom Rule
Forsythia in full bloom are a welcome sight after a long winter. But do those yellow flowers mean snow is on the way? See the history and folklore surrounding these harbingers of spring.
Quick Reference: Forsythia
- What it is: deciduous shrub (Forsythia x intermedia and others) with bright yellow flowers in early spring.
- Weather lore: the 3 snows of forsythia. Folk tradition holds you can expect 3 more snowfalls after forsythia blooms.
- USDA zones: 5 to 8. Hardy through winter to -20 F.
- Best pruning time: immediately after bloom (April to May). Pruning later removes next year’s flower buds.
- Tool: the Almanac’s Best Days calendar for moon-aligned pruning windows.
On this page
Related Almanac guides
Sources cited in this guide
Forsythia is the first burst of bright yellow most North American gardens see each spring, often blooming on bare branches before any other shrub. The plant has folkloric weather-prediction power (the “3 snows of forsythia” tradition holds you can expect 3 more snowfalls after the bloom), centuries of use in traditional Chinese medicine, and is one of the easiest landscape shrubs to grow in USDA zones 5 to 8. This guide is the weather lore, the history, the care guide, and the pruning rule that decides whether your forsythia blooms or sulks the next year.
The 3 Snows of Forsythia (Folk Weather Lore)
Per Almanac folklore records and Appalachian weather-tradition collections, forsythia’s bloom timing has been used as a long-range weather predictor for centuries.
- The rule: after forsythia first blooms in spring, expect 3 more snowfalls before winter is truly done.
- Why it works: forsythia blooms in response to soil-temperature thresholds, not air temperature. Once those thresholds hit, the plant flowers regardless of any remaining late cold fronts.
- Where the lore is strongest: Appalachia, Ohio Valley, mid-Atlantic. Tracks with the region’s typical late-March / early-April bloom date.
- Modern test: meteorologists who have compared forsythia bloom dates to subsequent snow events find rough correlation in zones 6 to 7, weaker correlation elsewhere.
When to Prune Forsythia (the Single Most Important Rule)
Per UMN Extension’s forsythia care research, the most common forsythia failure (no bloom this spring) traces to one cause: pruning at the wrong time.
- Prune within 6 weeks of bloom finishing. Late April to early June in most zones.
- Why: forsythia sets next year’s flower buds on this year’s new wood, mostly in June and July. Pruning in fall or winter removes those buds.
- How much: remove up to 1/3 of the oldest stems at the ground each year, plus shape lightly.
- Rejuvenation pruning: for overgrown old plants, cut all stems to 6 inches in early spring. You will lose 1 to 2 years of bloom but the plant returns vigorous and flowering by year 3.
- Never shear into a hedge. Forsythia hedges fail because the natural arching habit is what shows off the flowers.
Forsythia: Weather Lore, Medicine, Name, Care (Detail)
Below are the original sections on forsythia weather lore, traditional medicine, the plant’s name, growing care, and when to prune.
Forsythia and Weather Lore
Do these sunny yellow blooms mean snow is on the way? One of the most popular bits of folklore surrounding forsythia is the saying, “three snows after the forsythias bloom.” This saying most likely developed because when the forsythias bloom, during the earliest part of spring, the full transition from winter isn’t quite complete. In other words, don’t pack away those shovels when you see those little yellow flowers! Many people swear by this bit of weather lore, especially weather watchers in Ohio.
RELATED: Spring Weather Forecast
In some areas, forsythia is also known as the “Easter Tree,” with this name stemming from the fact that they come into bloom around Easter time.
Forsythia As Medicine
Forsythia is also one of the 50 fundamental herbs in Chinese herbal medicine. Forsythia suspensa, the weeping variety, also referred to as “lian qiao,” is considered a bitter, cold herb, and Chinese medicine associates it with the heart, lung, and gall bladder meridians. Chinese herbalists use it to detoxify the body, and as a remedy for headaches, fevers, and excessive thirst.
Note: Information on fok medicine is purely for educational purposes. The Farmers’ Almanac does not offer medical advice.
Behind the Name
This yellow-flowering shrub is named after William Forsyth (1737, 1804), a Scottish botanist who became the royal head gardener at Kensington Palace and St. James’s Palace in England where he remained until his death.
Forsyth was also a founding member of the Royal Horticultural Society in London. He created one of the world’s first rock gardens at the Chelsea Physic Garden, the oldest botanical garden in London. He had such a huge impact on gardening at the time that forsythias were named in his honor.
Growing Forsythia – A Pollinator Favorite
Forsythias are a deciduous shrub, meaning they’ll drop their leaves in the fall and winter. If you’re looking for a flowering shrub that fills in quickly, these beauties grow fast, up to 24 inches per year and up to 10 feet for larger varieties. Apart from the uncommon weeping forsythia, most of the shrubs have an upright form with long branches. And they’re a pollinator favorite as bees and butterflies love them.
Plant them in loose soil that is moderately moist but not too wet or dry, it should drain well. They’ll grow in full sun to part shade, though the more shade they get, the leggier they will be. Forsythia is cold hardy in USDA zones 5 through 8.
RELATED: Gardening by the Moon Calendar
When To Prune Forsythia
Take care with pruning. Because these shrubs grow so quickly and with such long branches, they can quickly start to look unkempt, which is perfect if you’re cultivating a wild woodland look. However, if you want to keep your forsythia bushes tidy, your best bet is to wait until after their spring flowering before breaking out the clippers. Then prune out about a third of the oldest branches. If need be, you can even cut all of the branches to the ground and let the forsythia re-sprout from scratch. This is an extreme measure that you may not want to take if you want a lot of greenery over the summer.
Forsythia FAQ
Can forsythia really predict the weather?
Folkloric tradition says yes (the 3 snows of forsythia rule), and meteorologists who have studied the correlation find rough agreement in USDA zones 6 to 7. The plant blooms in response to soil temperature reaching about 45 F for several consecutive days, which often precedes the last few late-season cold fronts.
When does forsythia bloom?
Late March to early May in most of North America. Zone 5: late April. Zone 7: early to mid April. Zone 8: late March. Bloom lasts 1 to 3 weeks depending on weather.
Why is my forsythia not blooming?
Three common causes per UMN Extension. First, pruning at the wrong time (fall or winter removes next year’s buds). Second, too much shade (forsythia needs 4+ hours direct sun). Third, late hard frost killing the buds (rare in well-sited plants).
How do you propagate forsythia?
Easiest method: take 6 to 8 inch softwood cuttings in early summer, dip in rooting hormone, stick in a moist sand/perlite mix, keep in indirect light. Roots in 4 to 6 weeks. Alternative: bury a low branch into damp soil and weight with a stone (layering); it roots within a year.
Is forsythia poisonous?
Mildly toxic if eaten in large quantity. Most pets and children ignore it. Per NIH NCCIH research, certain Forsythia species (especially F. suspensa) are used in traditional Chinese medicine but the dose and preparation matter; never self-medicate.
When was forsythia first introduced to North America?
Mid-19th century. The plant was discovered in northern China and Korea by European botanists and shipped to Western horticulture in the 1830s and 1840s, then to North America in the 1850s. The name commemorates William Forsyth, a Scottish royal gardener.
Amber Kanuckel
Amber Kanuckel is a freelance writer from rural Ohio who loves all things outdoors. She specializes in home, garden, environmental, and green living topics.
- Amber Kanuckel
- Amber Kanuckel
- Amber Kanuckel
- Amber Kanuckel
This is a Great Article 👍, Our Daffodils bloomed late February. Then we had Huge Winter Storm here in Nor. Cal, USA. The Daffodils just hung their heads, but, popped back up as soon as the storm passed.
We won’t start to see buds for weeks yet.
Light winter but no signs on bushes yet.
In the South the most common name is “Yellow Bell” bush. Those long branches make great little switches too. Lol they work.