Overwatering / root rot
Check trapped water, drainage and the condition of the base. Wet mix alone does not identify a pathogen, but soft, collapsing tissue or a bad smell needs prompt attention. Do not keep watering a saturated pot.
Inspect gently rather than squeezing healthy tissue. Retain firm roots and rhizome tissue; remove clearly decaying areas with clean tools if needed. Colour alone is not a reason to cut. Repot viable sections in fresh, freely draining mix and a pot suited to the remaining roots. Extensive decay needs specialist advice; drying the pot cannot restore tissue already rotted.
Low light
Weak new growth in a dim position is a reason to review light, but flopping does not prove a light problem. Inspect the leaf base first.
Increase indirect light gradually if needed. Existing creases may remain; judge the strength of later growth. Do not move straight from deep shade into hot sun.
Natural weight (not actually a problem)
A tall, firm leaf may lean because of its shape, weight or an old crease. Compare with the cultivar's normal habit and inspect for damage. If it is stable and otherwise healthy, a loose support is optional; do not tie it tightly or cut it merely to make every leaf vertical.
Underwatering
If the root ball is dry and the plant has been left without water for a prolonged period, water thoroughly and allow it to drain. Check that the centre is wetted, not just the gap around the edge of the pot.
Wait for the mix to dry appropriately before the next watering. If leaves remain limp in wet mix, investigate roots rather than soaking again. Old damage or lost leaves may not recover.
Root-bound
Check how full the container is, whether it is being distorted and whether the mix can still be watered evenly. A root emerging from a drainage hole is not, by itself, the explanation for falling or leaning foliage.
If crowding is substantial, repot into a modestly larger draining container. Do not use a very large pot to avoid future repotting; it can retain water around a small root system.
Keep a short care record
Photograph the whole plant and any damage, and note moisture checks and recent changes. Compare later growth rather than expecting an old scar to disappear. Continuing collapse, expanding lesions or extensive decay deserves specialist help.
Reference material
Reference material consulted for this independently written guide. The publishers listed have not reviewed or endorsed it.
- NC State Extension — snake plant
- University of Maryland — watering
- University of Maryland — symptom checks
- University of Maryland — root rots