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How to use rooting powder on compost, not in water

Updated: October 2026

You have a tub on the potting bench and a parent plant that is worth copying. How to use rooting powder is a compost-dip sequence, not a feed and not a trick for a jam jar of water. This page stays with spring and summer softwood and semi-ripe cuttings. The products in the [rooting powder comparison](/hub/fertiliser-soil-and-bark-mulch/rooting-powder) are dips you tap onto a fresh node. The method below follows Doff's 25 mm directions, BBC Gardeners' World, and Love The Garden. We did not time roots in a lab. A qualifying purchase through our links can earn a commission at no extra cost to you.

You have a tub on the potting bench and a parent plant that is worth copying. How to use rooting powder is a compost-dip sequence, not a feed and not a trick for a jam jar of water.

Our top picks

Westland Westland organic rooting powder 100 g

Best overall

Westland Westland organic rooting powder 100 g
9.2/10about £6.32
View offer
Doff Doff natural rooting powder 75 g

Best value

Doff Doff natural rooting powder 75 g
8.8/10about £5.16
View offer
Clonex Clonex rooting gel 50 ml

Alternative

Clonex Clonex rooting gel 50 ml
8.8/10about £8.99
View offer
On this page
  1. 1.Prepare the cutting
  2. 2.Decant, wet, dip, tap
  3. 3.Compost, hole, cover
  4. 4.When it fails

Prepare the cutting

Take the cutting in the morning from a healthy shoot that is not in flower. Softwood in late spring is typically 5–10 cm, cut just below a node, with the lower leaves stripped. Semi-ripe wood later in summer is firmer; the cut is still below a node. Crushed, torn or flowering wood fails before the powder does anything. Use a clean blade. If the parent is dry, water it the evening before. Easy plants often root with no dip. BBC Gardeners' World treats hormone as optional, and too much true hormone can damage the base. Seaweed powders in this set are not that hormone; still use a thin coat, not a clump. Winter hardwood lives on rooting powder for hardwood cuttings.

Decant, wet, dip, tap

Pour a little powder into a saucer or the lid. Do not push a wet stem into the stored tub. Compost and sap cake the rest of the pot. Westland reviewers use the lid as a dibber; that makes the hole, it is not a reason to dip into the store. Wet the basal 10–25 mm. Doff says stand the cutting in water, shake off, dip about 25 mm, tap, and plant at once. Westland says half an hour for soft stems and overnight for hardwood. A quick dip is enough for most houseplant wood. Tap to a light film, not a blob, and plant immediately. Gel follows the same rule: a little on a dish, then the bottle goes back. If you have not chosen a tub, the rooting powder buying guide sorts seaweed powder from gel.
Westland Westland organic rooting powder 100 g

Testsieger

Westland Westland organic rooting powder 100 g
9.2/10about £6.32
View offer

Compost, hole, cover

Powder belongs in a free-draining cuttings mix, not in a glass of water. Use peat-free compost, or a mix with grit or perlite, moist rather than sodden. Make the hole first — a dibber, a pencil, or the Westland lid — then drop the stem in. Pushing it in scrapes the powder off. Cover with a clear bag or a propagator lid, held off the leaves. Bright light, not a sealed bag on a hot south-facing sill. Westland's panel says April to September, bright but not direct sun, under glass or polythene. Open the cover once a day. Easy softwood often moves in two to three weeks; many subjects need six to eight, and Love The Garden's wider band is six to ten. When new growth appears and a light tug meets resistance, pot on and ease the bag off over a few days.

When it fails

Rot at the base is usually water, heat, or dirty wood, not a weak tub. If every stem blacks from the cut upwards, change the mix and the cover before you change the brand. Water washes powder off in a jar. If you want a jar, use a gel that stays on, or no dip and fresh water. That choice is on rooting powder or gel. A caked base still smothers the cut. Tap, and do not pack the hole. If the cultivar is too costly to lose, a professional IBA product and a trained bench are the next step, not a second supermarket tub.

Common questions

Do I wet the cutting first?
Yes, for the powders in this set. Doff says stand in water, shake off, then dip about 25 mm. Westland says half an hour for soft stems. The film needs a damp surface; a bone-dry cut sheds powder. Shake off the drip so you are not pouring water into the tub.
How much powder should I use?
A light coat on 10–25 mm of stem. Tap the extra back into the dish, not into the compost hole. A clump at the base stays wet and rots. We will not quote a strike-rate percentage for a thicker coat.
Can I dip into the stored tub?
No. Decant into a saucer or the lid. A wet stem contaminates the rest of the pot with sap and compost. Throw the leftover in the dish away; do not pour it back.
Does rooting powder work in a glass of water?
Not reliably. Water washes powder off. If you want a jar, use a gel that clings or take easy plants with no dip. Powder is a compost method.
How long until I see roots?
Easy softwood can move in two to three weeks; many summer cuttings need six to eight, and some need up to ten. Hardwood is months, not days — that is a different page. A gentle tug is the check, not daily unpotting.
Why are my cuttings rotting?
Usually the mix is too wet, the bag is too hot, or the wood was flowering or crushed. Clean the blade, make a hole before you insert, and open the cover daily. Changing brand before you change water and heat rarely fixes a rotten tray.
Do easy plants need powder at all?
Often not. Gardeners' World treats hormone as optional on easy subjects. A seaweed powder still gives you a method — wet, dip, tap, plant — but it is not required for every tradescantia or pelargonium.
When do I take the bag off?
When you see new growth and a light tug meets resistance. Ease it off over a few days so the leaves do not scorch. If the bag is dripping and the mix smells sour, ventilate sooner and let the compost dry slightly.

Related pages

Potting soil

Rooting powder

Best rooting powder UK: named tubs and a skip rule

Rooting powder buying guide: what the tub actually is

Rooting powder for hardwood cuttings: trench and wait

Rooting powder vs gel: compost dip or clinging coat

Sources

Public UK sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the eight amazon.co.uk listings captured on 21 October 2026. A seaweed or organic line is the listing's wording, not a MAPP. A hormone line on a box is not a current authorisation unless the HSE record says so. This is not a laboratory test and not a strike-rate trial.

  1. HSE, using pesticides in your garden, home or allotment (retrieved 21 October 2026)
  2. HSE, biostimulants and plant protection products (retrieved 21 October 2026)
  3. HSE garden database, Doff Hormone Rooting Powder MAPP 11986 (retrieved 21 October 2026)
  4. HSE register, Chryzopon Rose 0.1 % MAPP 17566 (retrieved 21 October 2026)
  5. GOV.UK, register as a seller of amateur plant protection products (retrieved 21 October 2026)
  6. BBC Gardeners' World, how to use hormone rooting powder (retrieved 21 October 2026)
  7. RHS, softwood cuttings (retrieved 21 October 2026)
  8. RHS, hardwood cuttings (retrieved 21 October 2026)