root rot on Mammillaria Grahamii
Quick answer
If your Mammillaria Grahamii has root rot, the most likely cause is: Mammillaria grahamii forms dense clusters of hooked-spine heads whose tuberous roots sit in damp soil, and like other small-clustering Mammillaria the genus notes a shallow pot is essential to keep root rot from spreading up the stem once cool, wet weather keeps the soil moist for too long.
Start here:
- 1. Keep the plant in a shallow pot, particularly once the cluster has produced multiple offsets, so the root ball dries out faster and never sits in damp soil during cool winter weather.
- 2. Allow the soil to become almost dry between waterings and use a good, porous cactus compost so excess moisture drains away before the tuberous roots begin to break down.
Why Mammillaria Grahamii gets root rot
Mammillaria Grahamii
Mammillaria grahamii forms dense clusters of hooked-spine heads whose tuberous roots sit in damp soil, and like other small-clustering Mammillaria the genus notes a shallow pot is essential to keep root rot from spreading up the stem once cool, wet weather keeps the soil moist for too long.
How to reverse root rot on Mammillaria Grahamii
- 1
Keep the plant in a shallow pot, particularly once the cluster has produced multiple offsets, so the root ball dries out faster and never sits in damp soil during cool winter weather.
- 2
Allow the soil to become almost dry between waterings and use a good, porous cactus compost so excess moisture drains away before the tuberous roots begin to break down.
- 3
If rot is visible on a stem, take a clean, rot-free cutting from a healthy tip with a sterilized tool, allow the wound to callus, and reroot it in fresh, porous cactus compost.
Keep root rot off this Mammillaria Grahamii
Use a porous cactus compost and water only when the soil is nearly dry; provide a dry, cool winter rest without overwatering and avoid deep containers that hold moisture around the roots of clustered Mammillaria grahamii.