Water Cuttings: Propagate Ivy, Coleus and Busy Lizzie for Free

In early summer, a look around the garden often reveals the same issue: borders still appear rather bare, while the budget for new plants has almost disappeared. This is where an almost magical technique comes in. Some plants root so readily in ordinary tap water that, with just a few simple steps, you can fill entire beds and window boxes free of charge.

Why now is the ideal time for water cuttings

Many ornamental plants can be propagated from spring through to late summer. June is particularly favourable. Plants are in active growth at this point, their shoots remain soft, and temperatures are generally around 20 to 25 degrees.

“Warm days, young shoots and plenty of sap pressure in the plant tissue help cut surfaces to heal quickly and new roots to form rapidly.”

Depending on the species, cuttings taken now can become well rooted young plants within one to four weeks. They can then be moved straight into pots or beds, filling bare patches without buying more plants from the garden centre.

These three plants root especially well in a glass of water

Not every species is equally suitable for propagation in a glass of water. However, these three favourites produce new plants almost reliably:

• Ivy – perfect for walls, trellises and hanging baskets
• Coleus – striking foliage in countless colours
• Busy Lizzie (Impatiens) – a prolific flowering plant for shady corners

All three root quickly in a glass of water without specialised equipment. Take several shoots from each parent plant and, before long, you will have a whole “mini nursery” on the windowsill.

Basic kit: very little is needed for water cuttings

This approach only requires items found in most homes. Expensive professional tools are unnecessary; cleanliness and light are what matter most.

• Cutting tool: clean, sharp secateurs or a knife
• Containers: small glasses, jam jars or clear cups
• Water: tap water left to stand for a few hours
• Position: bright, but away from direct midday sun

“As long as the water stays clear, the tools are clean and the cuttings receive enough light, the chances of success are surprisingly high.”

Rooting hormone can be useful, but it is generally unnecessary for these three plants. They are easy-going varieties that naturally produce new roots quickly.

General step-by-step method for water cuttings

The basic process is virtually identical for all three plants. The main variations are the shoot length and how often the water needs changing.

1. Choose a healthy shoot – it should have no pests or wilted leaves.
2. Decide on the length – roughly 7 to 15 centimetres, depending on the plant.
3. Make the cut – cut directly below a leaf node, where a leaf or side shoot emerges.
4. Remove the lower leaves – neatly pull off any leaves that would sit under water.
5. Place the cutting in a glass of water – one or two nodes should be submerged.
6. Change the water regularly – every two to five days, before it becomes cloudy.
7. Plant it up – once the roots measure between 2.5 and 5 centimetres long.

For planting, use loose, moist compost in a pot or a container filled with compost and a little sand. Avoid waterlogging, as young roots rot quickly in overly wet conditions.

Ivy in a glass of water: dense greenery within weeks

Ivy is a tireless grower in gardens and on balconies. Water cuttings make it possible to use that vigour deliberately, without immediately allowing it to take over everything.

How to take ivy cuttings

• Shoot length: around 10 to 15 centimetres
• Include several leaf nodes
• Make the cut directly below a node
• Remove the lower leaves from half the shoot length

Place the bare nodes in water. They will usually develop strong roots after two to four weeks. Once the roots are about five centimetres long, the ivy can be planted into a pot.

“Ivy thrives in the loose growing medium of a pot – where it remains easy to shape and does not spread uncontrollably through the garden.”

Containers with a trellis or hanging baskets are ideal. This lets you train ivy decoratively instead of later having to painstakingly remove it from walls or trees.

Coleus: a blaze of colour from one parent pot

Coleus is the quiet star of many window boxes. Its leaves range from lime green to deep purple and are often patterned in several colours. It can be multiplied in a glass of water in very little time.

Coleus cuttings step by step

• Select shoots measuring 8 to 12 centimetres long
• Do not use flowering tips; pinch out flower buds instead
• Leave two or three leaves at the top and remove the rest
• Replace the water every three to five days

In these conditions, coleus often shows its first root tips after only one week. After one to two weeks, the roots usually reach the required length of 2.5 to 5 centimetres.

“With only a few parent plants, you can grow enough young plants in a month to create entire window boxes in one colour scheme.”

To encourage vigorous foliage, it is worth occasionally pinching out the tips of newly planted coleus. This promotes branching and produces bushier plants.

Busy Lizzie: a carpet of flowers for shady spots

Busy Lizzie is ideal for partially shaded and shady positions. It is especially useful because it is among the plants that form roots very quickly in a glass of water.

Using Busy Lizzie to fill spaces quickly

• Take cuttings measuring 7 to 10 centimetres long
• Do not leave buds or flowers on the shoot
• Remove the lower foliage, leaving the top pair of leaves in place
• Renew the water every two to three days

After one to two weeks, the roots are generally 2.5 to 3 centimetres long. That is sufficient for plants to establish well in window boxes and along bed edges. Groups of several colours, propagated from just a few starter plants, look particularly attractive.

“Those who take cuttings and plant now can enjoy dense, flowering cushions on shaded patios and at entrances throughout the summer.”

Common mistakes with water cuttings and how to avoid them

Although the method seems simple, there are a few potential pitfalls. Most problems can be avoided with minor adjustments.

• Water turns slimy: it is changed too infrequently and shoots start to rot. Solution: replace it more often and rinse the jars.
• Leaves sit in the water: they decay and affect the growing environment. Solution: remove every leaf below the waterline.
• A draughty windowsill: cuttings can dry out easily. Solution: choose a bright, sheltered position.
• Direct sunlight: glasses act like magnifying lenses and the water heats up. Solution: provide indirect light only.

Inspect the shoots regularly to spot issues early and act before an entire batch of cuttings is lost.

When is the perfect time to plant them out?

Many amateur gardeners wait too long because the roots look so attractive in their glass of water. Once planted in pots or beds, they then need to adapt again, which slows the plant down.

Plant	Recommended root length	Typical time in water
Ivy	around 5 cm	2 to 4 weeks
Coleus	2.5 to 5 cm	1 to 2 weeks
Busy Lizzie	2.5 to 3 cm	1 to 2 weeks

After planting, keep the compost evenly moist without making it waterlogged. A partially shaded location for the first few days helps prevent stress while the roots branch out into their new growing medium.

Why water cuttings suit a small budget and limited time

Many garden projects fail because everything is bought and planted at once. Propagating in glasses of water spreads the work out. First come the quieter weeks while roots develop, followed by planting sessions in stages.

Anyone who plans part of their spring planting as “parent plants” can save a good deal of money by high summer. This is particularly true for coleus and Busy Lizzie, as there is then no need to carry additional trays home from the garden centre.

Practical ways to use the new plants

These free young plants offer plenty of design possibilities:

• Ivy for green privacy screens on a balcony or to frame wheelie bins
• Coleus as colourful accents among more simply flowering summer plants
• Busy Lizzie as a carpet beneath shrubs where bare soil was previously visible
• Small presents: home-grown young plants in decorative glasses as gifts

People who start experimenting with water cuttings often soon try additional species. Many herbs and ornamental plants also respond well to this method. The three classic plants described here are the ideal introduction because they deliver dependable, quick initial results.