Troubleshooting
New Zealand Gentian problems — and how to fix them
New Zealand Gentian (Gentiana saxosa) 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 and root rot
The principal killer; caused by excessive soil moisture and poor air circulation, especially in humid UK summers. Grow in an alpine house or very sheltered raised bed with a grit mulch around the collar to prevent moisture accumulating at the crown.
Slug and snail damage
The fleshy rosette leaves are particularly attractive to slugs and snails; apply wildlife-safe iron phosphate pellets or use copper tape around containers, and inspect plants at night during damp weather.
Prevent new zealand gentian problems before they start
Most new zealand gentian issues are care-mismatch, not bad luck. Dial in the basics:
New Zealand Gentian problems — FAQ
Why is my new zealand gentian crown and root rot?
The principal killer; caused by excessive soil moisture and poor air circulation, especially in humid UK summers. Grow in an alpine house or very sheltered raised bed with a grit mulch around the collar to prevent moisture accumulating at the crown.
Why is my new zealand gentian slug and snail damage?
The fleshy rosette leaves are particularly attractive to slugs and snails; apply wildlife-safe iron phosphate pellets or use copper tape around containers, and inspect plants at night during damp weather.