Troubleshooting
Hatchet Cactus problems — and how to fix them
Hatchet Cactus (Pelecyphora aselliformis) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot
The most common problem; caused by overwatering or poorly draining soil. Act quickly if the base softens — remove from the pot, trim rotten roots, dust with sulphur, and repot dry.
Mealybugs in the comb-spine areoles
The pectinate spines create excellent hiding spots. Inspect closely and treat with isopropyl alcohol applied with a fine brush.
Loss of characteristic tubercle shape under low light
Inadequate light causes the normally flat hatchet-shaped tubercles to elongate. Increase sun exposure.
Collar rot at the soil line
Moisture sitting against the stem at soil level can cause rot here. A top-dressing of coarse mineral grit helps keep the base dry.
Very slow growth rate
Entirely normal for this species. Growth is measured in millimetres per year; flowering may not occur for several years after purchase.
Prevent hatchet cactus problems before they start
Most hatchet cactus issues are care-mismatch, not bad luck. Dial in the basics:
Hatchet Cactus problems — FAQ
Why is my hatchet cactus root rot?
The most common problem; caused by overwatering or poorly draining soil. Act quickly if the base softens — remove from the pot, trim rotten roots, dust with sulphur, and repot dry.
Why is my hatchet cactus mealybugs in the comb-spine areoles?
The pectinate spines create excellent hiding spots. Inspect closely and treat with isopropyl alcohol applied with a fine brush.
Why is my hatchet cactus loss of characteristic tubercle shape under low light?
Inadequate light causes the normally flat hatchet-shaped tubercles to elongate. Increase sun exposure.
Why is my hatchet cactus collar rot at the soil line?
Moisture sitting against the stem at soil level can cause rot here. A top-dressing of coarse mineral grit helps keep the base dry.
Why is my hatchet cactus very slow growth rate?
Entirely normal for this species. Growth is measured in millimetres per year; flowering may not occur for several years after purchase.