How to Take Hydrangea Cuttings That Actually Root

Hydrangeas are among the easiest of all garden shrubs to multiply — generous rooters that forgive imperfect technique. A single healthy bush can supply a whole hedge, gifts for half the street, and insurance copies of a plant you love, all for the price of a bag of compost. And the timing works out beautifully: late summer, right now, is one of the two ideal windows for taking cuttings, using the season's semi-ripe shoots.

When to take hydrangea cuttings

There are two prime windows, defined by the state of the wood rather than the date. Softwood cuttings are taken in late spring to early summer, from soft, flexible new shoots — they root fastest, in as little as two to three weeks, but wilt quickly and need close attention. Semi-ripe cuttings are taken from mid to late summer, when this year's shoots have begun to firm up at the base while the tip is still green and soft. They root a little more slowly — four to six weeks — but they're far more resilient along the way, which makes late August a forgiving moment for a first attempt. Whichever window you use, cut in the morning while the shoots are full of water, and go for shoots that have not flowered: a stem that has spent its energy on a bloom roots reluctantly, so hunt for the leafy, flowerless shoots lower down or inside the bush.

What you'll need

• A healthy, well-watered hydrangea (water it deeply the evening before)
• Clean, sharp secateurs or a knife
• Small pots with drainage holes, or a seed tray
• A free-draining rooting mix: half multi-purpose compost, half perlite or coarse sand
• Rooting hormone powder or gel (optional — hydrangeas root well without it, but it speeds things up and evens out success)
• A clear plastic bag, bottle-half or propagator lid for humidity

Step by step

• 1. Cut a 10–15 cm length from a non-flowering shoot, making the bottom cut just below a leaf node — the joint where leaves meet the stem. That node is where most of the new roots will form.
• 2. Strip the leaves from the lower half of the cutting, leaving just the top pair. Hydrangea leaves are big, so cut each remaining leaf in half crosswise. It looks brutal, but it halves the water the cutting loses while it has no roots, and that's what keeps it alive.
• 3. Dip the base in rooting hormone if you're using it, tapping off the excess.
• 4. Insert the bottom third of the cutting into moist rooting mix, firming gently. Several cuttings can share a pot — space them around the rim so their leaves don't touch.
• 5. Water lightly, then cover with the clear bag or propagator lid to lock in humidity. Keep the plastic from resting on the leaves — a couple of sticks make a fine tent frame.
• 6. Stand the pot somewhere bright but out of direct sun. A north-facing windowsill, a shaded cold frame or a spot under a garden bench all work.

Aftercare: the waiting game

Check the cuttings every few days: air the cover for a few minutes, keep the mix just moist — never wet — and remove any cutting that turns brown or mouldy before it infects its neighbours. Resist the urge to tug too early. After three to four weeks (softwood) or five to six (semi-ripe), a gentle pull that meets resistance means roots; white roots peeking from the drainage holes settle the question. Once rooted, uncover the cuttings gradually over a week to reaccustom them to normal room air, then pot each one into its own small pot of regular compost.

Getting young plants through their first winter

A cutting rooted in late summer is not ready for an open border with winter coming. Grow the young plants on somewhere bright and frost-free — an unheated greenhouse, cold frame, or a cool, bright windowsill — and keep them barely moist through the cold months while they're semi-dormant. Their small root balls freeze much faster in pots than they would in the ground, so in cold regions bubble-wrap the pots or plunge them rim-deep in a sheltered garden corner. Plant them out in spring after the last frost, into soil improved with compost, and water well through their first summer. Most will produce their first proper flowerheads in their second year.

Tip: label every pot with the parent plant and date. Hydrangea cuttings all look identical for months, and by the time they flower you will not remember which came from the gorgeous deep-blue mophead and which from the neighbour's pink one.

Warning: never leave a covered pot of cuttings in direct sunlight — under clear plastic, temperatures soar in minutes and the cuttings cook before they wilt. Bright shade is the rule for the whole rooting period.

Will the new plant's flowers match the parent?

Genetically, yes — a cutting is a clone. But if you're propagating a bigleaf hydrangea (Hydrangea macrophylla), the flower colour is famously negotiable: blue in acidic soil where aluminium is available to the roots, pink in alkaline soil where it isn't. So a cutting of a blue hydrangea planted into limey soil will bloom pink — same plant, different chemistry. White-flowered varieties stay white regardless. If you're not sure which hydrangea species you're propagating — mophead, lacecap, panicle and oakleaf all take cuttings slightly differently in vigour — snap a photo in PlantMe: the app identifies 35,000+ plant classes with 93% top-3 accuracy and gives species-specific care advice in 28 languages.