Leggy Kalanchoe: Fix Low Light, Cut Back and Re-Root

Florist kalanchoe (Kalanchoe blossfeldiana) should be a compact plant. NC State Extension’s kalanchoe profile describes an upright, multi-branched plant 15–45 cm (6–18 in) tall. If yours has become a few floppy stems with leaves at the ends, light is the first thing to check. Clemson Extension’s kalanchoe factsheet notes plants tend to get spindly in low light.

Signs it is short of light

• Wide gaps between leaf pairs. The University of Maine’s Bulletin 2612 describes etiolation as long, weak stems with large spaces between leaves. It calls this a common sign of too little light in succulents grown indoors.
• Pale, thin new growth. Iowa State University Extension’s succulent problems guide says tall, spindly new growth that is pale signals light that is too low.
• Stems leaning to the window.
• Few or no flowers. NC State says the plant needs 6 to 8 hours of bright light a day to bloom.

Rule out feeding too. Iowa State’s environmental guide says too much fertilizer promotes spindly growth. Clemson suggests feeding actively growing kalanchoe once a month.

Step 1: Give it more light

NC State recommends bright, indirect light or partial shade, with afternoon shade because prolonged direct sun can scorch the leaves. Clemson says kalanchoe tolerates bright indoor light well.

Iowa State says succulents indoors need abundant bright, indirect light, ideally ten or more hours a day. Where no window is bright enough:

• Use full-spectrum LED or high-output fluorescent grow lights.
• Set the plant within 30 cm (12 in) of the light.
• Run the lights 12 to 16 hours a day on a timer.

Raise light in steps. Iowa State warns that succulents moved suddenly from low light into bright sun scald, and the burned patches never recover. UMaine gives the same warning about sudden increases.

Mind the reblooming season. NC State says the plant needs 14 hours of total darkness a day for at least six weeks in fall and winter to set buds. Give that darkness at night only, and keep days bright. Our kalanchoe dormancy guide covers the timing.

Step 2: Cut back the stretched stems

Better light improves new growth only. Iowa State notes the old growth will always look spindly, and some succulents need pruning to remove lanky growth.

Clemson’s advice after flowering is to cut back tall growth and old flower stems. That is the natural time to reshape a leggy plant.

1. Remove spent flower stems first.
2. Shorten the most stretched stems, cutting just above a leaf pair. Our houseplant pruning guide shows where the node sits.
3. Keep the leafy tips you remove for cuttings.

Step 3: Root the tips

Clemson gives a precise method:

• Use vegetative shoots, not flowering ones, which root less well.
• Take tip cuttings 5–7.5 cm (2–3 in) long with two pairs of leaves.
• Remove the bottom leaves. No rooting hormone is needed.
• Let the cutting callus for several days before inserting it.
• Spring or early summer is the best time.

Root them in a well-drained cactus or succulent mix, which NC State recommends for potted kalanchoe. Several rooted tips in one pot make a fuller plant than one stretched stem.

Water to match the light

A kalanchoe in dim light uses water slowly. Clemson warns that overwatering damages kalanchoe and says to let the soil dry slightly between waterings. NC State says to let it dry out, then water deeply. Soft, collapsing stems in wet mix point to rot; see kalanchoe overwatering.

The ASPCA lists kalanchoe as toxic to dogs and cats, so keep trimmings away from pets. For other species, see our kalanchoe varieties guide, the kalanchoe hub and the propagation guide.

References

• Clemson Cooperative Extension, HGIC: Kalanchoe
• NC State Extension Gardener Plant Toolbox: Kalanchoe blossfeldiana
• Iowa State University Extension and Outreach: Common Problems and Issues of Succulents
• Iowa State University Extension and Outreach: Diagnosing Houseplant Problems from Improper Environmental Conditions
• University of Maine Cooperative Extension: Bulletin #2612, Dealing with Houseplant Problems
• ASPCA: Kalanchoe