Hydrangea Care: So They Don't Wilt Within Hours
Hydrangeas are floristry's workhorses — but fragile if you don't know the few tricks.
Hydrangeas are the most popular volume in modern bouquets — and at the same time the plant that dies from the most care mistakes. The main mistake is always the same: not enough water uptake.
What makes hydrangeas unique: an extremely woody stem that takes up little water, combined with giant blooms that transpire enormously. The ratio is physiologically nearly always in deficit. When the blooms wilt, the plant isn't 'not thirsty' but 'can't drink fast enough'.
Most important trick: score the stem crosswise with a knife, or roughen the bottom centimetre. This triples to quintuples the water uptake surface.
Water depth: deep. Hydrangeas are one of the few cut flowers that want lots of water — at least 10 cm of stem submerged. Unlike tulips, which want little.
Water change: daily at warm room temperature, every 2 days in a cool room. Hydrangea water clouds fast because the woody stems release organic matter.
Location: cool and shaded. Direct sun kills hydrangea blooms within a day — heads dry out, droop, and can't be revived.
If the hydrangea is limp: lay the whole bouquet in a bucket of cold water overnight — including the heads (not just stems). Hydrangea blooms absorb water through their surface. By morning they're usually upright again.
In bridal bouquets: caution. Bridal bouquets often go 4–8 hours without water. Hydrangeas can't handle that in summer heat — we deliver bridal bouquets with hydrangeas always with water tubes at the stem, or compose last-minute before the ceremony.
Late summer and autumn: hydrangeas start to 'antique' — heads slowly dry and take on rosé-green, copper tones. This phase is ideal for drying. See the 'Drying hydrangeas' guide.
Potted hydrangeas (in a pot rather than cut) need entirely different care: much more water, nearly daily in summer, kept in shade. Colour changes with soil pH (acid = blue, alkaline = pink).
Frequently asked
- Why is my hydrangea drooping?
- Almost always water shortage. Score the stem crosswise, place in deep cold water, for severe wilt dunk the head in water for 30–60 minutes.
- How long do hydrangeas last in a vase?
- With good care 7–14 days. In heat and dryness often only 3–5 days. In late summer ('antique' phase) they discolour and stay dried for months.
- Can I combine hydrangeas with tulips?
- Tricky — hydrangeas want lots of water, tulips want little. Better hydrangeas in their own deep vase, tulips next to them in a shallow one.