root rot on Mammillaria Elongata
Quick answer
If your Mammillaria Elongata has root rot, the most likely cause is: Soggy compost allows rot to begin at the roots of cacti such as Mammillaria elongata and spread rapidly up through the plant body, only becoming apparent to the casual eye once it is too late to remedy, so even brief overwatering during the cool rest period can be fatal to the whole cluster.
Start here:
- 1. Unpot the Mammillaria elongata, shake off all wet compost and cut away every soft, blackened root or stem base, then let the cut surfaces dry and callus in a warm, airy place for a full day before repotting into a fresh, fast-draining cactus mix.
- 2. After repotting, withhold water until the new compost is fully dry, then resume a cycle of a thorough soak followed by a complete dry-down, because Mammillaria elongata recovers from drought far better than from continually damp roots.
Why Mammillaria Elongata gets root rot
Mammillaria Elongata
Soggy compost allows rot to begin at the roots of cacti such as Mammillaria elongata and spread rapidly up through the plant body, only becoming apparent to the casual eye once it is too late to remedy, so even brief overwatering during the cool rest period can be fatal to the whole cluster.
How to reverse root rot on Mammillaria Elongata
- 1
Unpot the Mammillaria elongata, shake off all wet compost and cut away every soft, blackened root or stem base, then let the cut surfaces dry and callus in a warm, airy place for a full day before repotting into a fresh, fast-draining cactus mix.
- 2
After repotting, withhold water until the new compost is fully dry, then resume a cycle of a thorough soak followed by a complete dry-down, because Mammillaria elongata recovers from drought far better than from continually damp roots.
Keep root rot off this Mammillaria Elongata
Pot Mammillaria elongata only in a gritty, free-draining cactus mix with a deep layer of crocks at the base, water only when the compost has dried all the way through, and keep the plant almost dry during the cool winter rest so it never sits in soggy compost.