Troubleshooting
Green Spleenwort problems — and how to fix them
Green Spleenwort (Asplenium viride) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Crown rot
Caused by waterlogging or poor drainage, especially on heavy clay. Prevent by ensuring at least 5 cm of grit beneath the crown; once crowns blacken they rarely recover.
Slug and snail damage
Young fronds are particularly vulnerable in spring. Use iron-phosphate pellets around the crown or apply a copper ring barrier; avoid slug bait that harms ground beetles.
Prevent green spleenwort problems before they start
Most green spleenwort issues are care-mismatch, not bad luck. Dial in the basics:
Green Spleenwort problems — FAQ
Why is my green spleenwort crown rot?
Caused by waterlogging or poor drainage, especially on heavy clay. Prevent by ensuring at least 5 cm of grit beneath the crown; once crowns blacken they rarely recover.
Why is my green spleenwort slug and snail damage?
Young fronds are particularly vulnerable in spring. Use iron-phosphate pellets around the crown or apply a copper ring barrier; avoid slug bait that harms ground beetles.