Hydrangea

Flower care guide

Hydrangea

Big, generous heads made up of dozens of small florets. One stem fills a vase on its own, which makes hydrangea the most efficient flower in the shop and one of the most temperamental.

In season

Year round, at their best from May through September.

Also known as

Hortensia

Caring for your hydrangeas

Hydrangea stems are woody, and a woody stem struggles to pull water up through a clean flat cut. Split the bottom inch of the stem vertically with a sharp knife, or crush it lightly, so water can get in. Then cut at a steep angle and put it straight into deep water.

Unusually, hydrangeas absorb water through their petals as well as their stems. Mist the head lightly every day and it will hold far better.

If a head wilts, it is almost always dehydration rather than the end. Fill a sink or bowl with cool water and submerge the entire flower head for twenty to thirty minutes, then recut the stem and return it to the vase. Most hydrangeas revive completely.

Keep them out of direct sun and away from heat. They are thirsty, so check the water level daily rather than every other day, and top it up.

At the end of their vase life you can let a hydrangea dry in place. Stop topping up the water and let it evaporate slowly; the head keeps its shape.

Hydrangea flowers change colour with soil chemistry: acidic ground turns them blue, alkaline ground turns the same plant pink.