Snake Plant (Sansevieria) Yellow Leaf Edges: Causes and Correct Winter Care

Is Your Mother-in-Law's Tongue Sick?

Your 11½-year-old sansevieria, a cherished memorial plant, shows yellowing leaf edges after repotting. You found "grayish wormy bugs" on the old pot (likely fungus gnat larvae or springtails—harmless). The plant sits in medium light at 66–67°F with weekly watering. The diagnosis: overwatering, especially for winter.

Why Yellow Edges Appear

• Normal aging: Older leaves naturally yellow at tips/edges.
• Overwatering: Sansevieria stores water in thick rhizomes and leaves. Winter watering every 7 days in cool, low-light conditions causes root suffocation and nutrient uptake issues.
• Cold + wet = root stress: At 66°F, the plant is semi-dormant and needs minimal moisture.

Correct Winter Care Regimen

1. Water only when soil is completely dry—every 3–4 weeks in winter.
2. Use a moisture meter or wooden chopstick test: insert deep; if it comes out clean, water.
3. Provide bright indirect light—east or west window ideal.
4. Keep above 50°F; avoid cold drafts.
5. No fertilizer November–March.

Repotting Notes

Your repotting was well-timed (pot-bound plants decline). Use a cactus/succulent mix with added perlite. Ensure the new pot has drainage holes and isn't excessively large—sansevieria prefers snug quarters.

Recovery Outlook

Existing yellowed edges won't revert, but new growth will be healthy if you correct watering. Trim unsightly tips at an angle with sterilized scissors. Your plant can live decades more with proper care.

Resources: Desert Tropicals, Flowers.org.uk, Wikipedia Sansevieria entries