Can you root geranium cuttings in water? Yes, but it’s the less reliable method. Take 3–4 in (8–10 cm) stem tips, strip the lower leaves, stand them in clean water in bright, indirect light and change the water often. Geranium cuttings in water can turn slimy and rot, so Iowa State and Wisconsin Extension recommend a well-drained rooting medium, where cuttings root in about 6–8 weeks.
Key takeaway: Geranium cuttings in water can root, but expect some losses with these Pelargonium stems. Use short, firm tip cuttings, very clean water and bright light, and move them to a gritty mix as soon as roots appear.
| Factor | Recommendation | Source |
|---|---|---|
| Cutting length | 3–4 in (8–10 cm) stem tips | Iowa State; Wisconsin |
| Leaves | Pinch off the lower leaves | Iowa State; Wisconsin |
| Light | Bright, not direct sun | Iowa State; Wisconsin |
| Rooting time in medium | About 6–8 weeks | Iowa State; Wisconsin |
| Cut end | Let air-dry and callus before sticking in media | Illinois Extension |
| Best timing to overwinter | Late summer softwood cuttings | RHS |
Do Geranium Cuttings Root Well in Water?
They can root, but they’re not the best water-rooting candidate. BBC Gardeners’ World says geranium cuttings do root in water but with a lower success rate than in compost, the water can go slimy and needs regular changing, and you still have to pot them up afterward, so you don’t save time.
Common bedding “geraniums” are Pelargonium, which have fleshy, succulent-like stems. Illinois Extension groups geranium with succulents, cacti and rubber plant as cuttings that shouldn’t go straight into media without letting the cut surface air-dry and heal first, because the callus helps prevent disease. A cut stem sitting in water never gets that chance. Illinois also warns, in general, that roots formed in water are often weak and don’t adapt as easily to potting mix as roots formed in media.
| Method | Pros | Cons |
|---|---|---|
| Geranium cuttings in water | See roots form; no mix needed at first | Rot and slime risk; weaker roots; extra transplant step |
| Rooting medium | Extension-recommended; sturdier roots | Can’t see roots; must manage moisture |
How Do You Root Geranium Cuttings in Water Step by Step?
- Choose healthy, non-flowering stems from a vigorous plant.
- Cut 3–4 in (8–10 cm) tips with a sharp, clean knife, just below a node.
- Pinch off the lower leaves and any flower buds so no foliage sits in water.
- Let the cut end dry for a few hours to start a callus, following Illinois’ advice for geraniums.
- Stand the cuttings in a clean glass with only the bottom 1 in (2.5 cm) or so submerged.
- Place in bright light, not direct sun, at normal room temperature.
- Change the water every few days, or sooner if it clouds.
- Pot up when roots are about 1 in (2.5 cm) long into a well-drained mix.
For more water-rooting options, see our list of plants that grow in water.
How Do You Pot Up Geranium Cuttings in Water Once They Root?
Move them once you see a few roots about 1 in (2.5 cm) long; waiting for a thick mass of water roots only makes the switch harder. BBC Gardeners’ World uses peat-free multipurpose compost mixed with sharp sand for drainage, sets two or three cuttings around the edge of each pot and stands them in a well-lit spot indoors. Keep the mix lightly moist for the first couple of weeks while water roots adjust, then let it dry a little between waterings. Discard any that never root, since Gardeners’ World notes they can harbor disease.
How Long Do Geranium Cuttings Take to Root?
Timing is the biggest unknown with geranium cuttings in water. In a rooting medium, Iowa State says cuttings should root in 6–8 weeks, and Wisconsin Extension says about 6 weeks. There’s no extension timeline specific to geranium cuttings in water, and results vary with temperature, light and stem condition. Expect some cuttings to fail, so take a few more than you need. If a stem turns black, soft or mushy at the base, discard it and keep the water clean for the rest.
What Is the Extension-Recommended Way to Root Geraniums?
Iowa State and Wisconsin both describe rooting in a medium rather than water:
- Take 3–4 in (8–10 cm) tip cuttings and pinch off lower leaves.
- Dip the base in rooting hormone, a step both include; BBC Gardeners’ World calls it optional.
- Stick cuttings in vermiculite, perlite and peat, sand or a commercial rooting mix, in a container with drainage holes.
- Water, let it drain, and keep the medium moist.
- Place in bright light, not direct sun, which Wisconsin says can burn cuttings.
- Pot each rooted cutting into its own container of potting soil.
Iowa State suggests a clear bag or dome to prevent wilting, while BBC Gardeners’ World advises not covering pelargonium pots because it can encourage mildew; if you use a cover, vent it daily. Our perlite and vermiculite guide and humidity dome guide cover both.
Why Do Geranium Cuttings in Water Rot?
- Stale water: bacteria build up fast around a fleshy cut stem; change it often.
- Leaves under water: they decay and foul the glass; strip them.
- Weak or woody stems: Gardeners’ World suggests healthy, squat, fat stems.
- Too warm and dark: slow rooting gives rot more time.
- Fresh, uncallused cuts: Illinois advises letting geranium cuts heal first.
Rot in water often looks like the root problems in our Pythium root rot guide.
When Should You Take Geranium Cuttings?
For overwintering, the RHS recommends taking softwood cuttings in late summer. Once rooted, keep them on a well-lit indoor windowsill, water sparingly in winter, start feeding in late winter, pinch the tips for bushiness and pot up in mid-spring. Wisconsin notes cuttings work especially well if you can’t overwinter large pots. Iowa State says to keep potted rooted cuttings in a sunny window or under artificial lighting until spring.
Can You Grow Geranium Cuttings in Water Long Term?
It isn’t a good long-term plan. The RHS advises watering overwintered pelargonium cuttings sparingly and letting the compost dry out between waterings, the opposite of constant water. Treat water as a short rooting stage, then move rooted cuttings into a gritty, free-draining mix. If you want a true water-culture plant, choose a better fit such as pothos in water.
FAQ About Geranium Cuttings in Water
Can you root geranium cuttings in water?
Yes, but rooting in a medium is more reliable.
How long until geranium cuttings root?
About 6–8 weeks in medium, per Iowa State.
Should I use rooting hormone?
It’s optional; Iowa State and Wisconsin both suggest it.
Why are my geranium cuttings in water turning black?
Usually rot from stale water or a fleshy, uncallused cut.
Do geraniums need a humidity dome?
Iowa State suggests one; vent it to avoid excess humidity.
Sources
- Iowa State University Extension — How Do I Take Geranium Cuttings?
- University of Wisconsin–Madison Extension — Overwintering Tender Geraniums
- University of Illinois Extension — Houseplant Cuttings
- University of Illinois Extension — Houseplant Propagation
- BBC Gardeners’ World — How to Take Geranium Cuttings
- Royal Horticultural Society — How to Grow Pelargoniums
- Photo credits (Wikimedia Commons, edited with titles): Staande geranium Pelargonium zonale wit. 20-06-2025. (actm.) 02 by Agnes Monkelbaan Staande geranium Pelargonium zonale wit. 20-06-2025. (actm.) 03 (CC BY-SA 4.0); Staande geranium Pelargonium zonale wit. 20-06-2025. (actm.) 02 by Agnes Monkelbaan Staande geranium Pelargonium zonale wit. 20-06-2025. (actm.) 03 (CC BY-SA 4.0); Ficus cuttings with roots in a bottle, White background by Biusch (CC BY-SA 3.0); Basilikum (Ocimum basilicum) Stecklinge — Josef Schlaghecken by Schlaghecken Josef (CC BY-SA 4.0); Fleece lined greenhouse potting tray and seed pots – Flickr – peganum by peganum from Small Dole, England (CC BY-SA 2.0)