Troubleshooting
Yellow Whitlowgrass problems — and how to fix them
Yellow Whitlowgrass (Draba aizoides) 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.
Crown rot in wet winters
Prolonged winter wet is the primary killer. The tight cushion traps moisture at the collar. Grow in well-drained, sloping positions or in an alpine house during wet winters; always use a grit top-dressing.
Cushion dying back centrally
Old cushions can die back in the centre while the edges remain healthy. Carefully divide and replant the vigorous outer portions in fresh gritty compost every 3–4 years to rejuvenate the plant.
Aphids on flower stems
Colonies of aphids sometimes attack the soft flower stems and buds in early spring. Remove by hand or with a gentle jet of water. Avoid chemical sprays on the tight cushion, which retains moisture.
Prevent yellow whitlowgrass problems before they start
Most yellow whitlowgrass issues are care-mismatch, not bad luck. Dial in the basics:
Yellow Whitlowgrass problems — FAQ
Why is my yellow whitlowgrass crown rot in wet winters?
Prolonged winter wet is the primary killer. The tight cushion traps moisture at the collar. Grow in well-drained, sloping positions or in an alpine house during wet winters; always use a grit top-dressing.
Why is my yellow whitlowgrass cushion dying back centrally?
Old cushions can die back in the centre while the edges remain healthy. Carefully divide and replant the vigorous outer portions in fresh gritty compost every 3–4 years to rejuvenate the plant.
Why is my yellow whitlowgrass aphids on flower stems?
Colonies of aphids sometimes attack the soft flower stems and buds in early spring. Remove by hand or with a gentle jet of water. Avoid chemical sprays on the tight cushion, which retains moisture.