The two toughest houseplants you can buy have one weakness, and it's the watering can. If your snake plant has leaves that are soft, mushy or toppling at the base, or your ZZ plant has yellowing stems and a wobbly, soft base, the cause is almost certainly rot from compost that stayed wet too long. Winter makes it worse: the plant barely uses water, and cold, damp compost stays wet for weeks. The rotten parts can't be saved, but healthy pieces often can.
01At a glance
- Soft, mushy, collapsing: rot from overwatering. Wrinkled or puckered leaves can mean thirst, but in wet compost assume rot.
- Winter watering: the RHS says snake plants barely need any water in winter unless they're somewhere particularly warm. North Carolina State Extension suggests every one to two months for snake plants and about once a month for ZZ.
- Check the base first: a wobbling rosette or whole plant leaning over is the RHS's sign to look for root rot.
- Rescue: cut away anything soft, keep the firm parts, and repot into dry, gritty compost.
02Why it happens
Both plants store water. Snake plants hold it in their thick leaves. ZZ plants hold it in fat, potato-like underground rhizomes. University of Connecticut's ZZ plant guide says overwatering is the main thing that kills it, with yellow leaves and rotting rhizomes as the signs. North Carolina State says of snake plants: do not overwater, as the roots will rot. Oklahoma State notes the ZZ rhizome is the part prone to rotting.
The RHS adds that compost which stays damp after watering encourages root rot, and that leaving pots standing in water is the main cause of poor health. In a cool room in winter, that damp can last for weeks. Low temperatures add to it: the RHS warns that warm-loving plants kept too cold can collapse and rot. Keep snake plants above 10°C, as the RHS advises, and ZZ plants above 12°C, the minimum on our profile.
03Check the damage
- Stop watering.
- Ease the plant out of its pot and shake off the compost.
- Squeeze each leaf base, stem base and rhizome. Healthy tissue is firm. Rot is soft, dark, often translucent, and may smell.
- Look at the roots. Firm, pale roots are alive. Brown, mushy ones are not.
If the whole base is soft, the plant is unlikely to recover. Move straight to saving any firm leaves. If only part of the clump is affected, you can save the rest.
04Save the healthy parts
Divide off the healthy part. For snake plants, the RHS method is to split the clump into pieces, each with one or more leaves attached to roots, discard damaged or dead sections, and repot only healthy ones. Do the same with a ZZ, keeping only firm rhizomes with firm stems. The RHS gives spring (March to May) as the time to propagate, but a rotting plant can't wait.
Repot into fresh, free-draining compost. The RHS suggests peat-free cactus compost, or two parts peat-free loam-based compost to one part horticultural grit. Use a pot only slightly bigger than the roots, with drainage holes. Never reuse the old, wet compost.
Take leaf cuttings as insurance.
- Snake plant: the RHS method is to cut a healthy, mature leaf at the base, slice it widthways into 5cm sections, and keep track of which end was the bottom. Leave them a day or two to callus, then push them halfway, bottom down, into damp peat-free cuttings compost or a 50:50 mix of compost and grit. They want warmth: about 18°C. Cuttings from yellow-edged varieties usually come back plain green. Division keeps the markings.
- ZZ: University of Connecticut says to take a whole leaf, let the cut callus for a few hours, push the stalk into moist potting medium and give it indirect light. Be patient: indoors, a new rhizome can take up to nine months to form.
05Is it rot or thirst?
- Soft, mushy, translucent, wet compost: rot.
- Yellowing ZZ stems with a soft base: rot.
- Whole snake plant leaning or wobbling: check for rot. The RHS also notes vine weevil grubs eating the roots can make leaves collapse.
- Wrinkled leaves in bone-dry compost after months without water: thirst. Water thoroughly and let it drain.
Wear gloves when cutting either plant, and before handling or placing them where children or pets can reach, check the safety flags on our snake plant and ZZ plant profiles.
How we checked this
Every care and safety claim on this page is verified against horticultural and veterinary sources.
Sources: RHS — How to grow sansevierias · RHS — Sansevieria · RHS — How to grow houseplants · NC State Extension — Dracaena trifasciata · NC State Extension — Zamioculcas zamiifolia · UConn Home & Garden Education Center — ZZ plant · Oklahoma State University — ZZ plant
Checked 8 October 2026. If our advice ever conflicts with the RHS, believe them and tell us.