Troubleshooting
Redbor Kale problems — and how to fix them
Redbor Kale (Brassica oleracea var. sabellica 'Redbor') 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.
Cabbage caterpillars
Cabbage white and looper larvae shred leaves and hide deep in the curls. Use insect-mesh covers, inspect the frilly leaves closely, and hand-pick or treat with Bt.
Cabbage aphid
Grey waxy aphids colonise the dense curls and growing point, where they are hard to dislodge. Use a strong water jet, insecticidal soap and natural predators; check often.
Wind rock
Tall plants on loose soil rock in wind, loosening roots and stunting growth. Plant firmly and deeply, earth up the stem, and stake exposed plants.
Clubroot and whitefly
Swollen distorted roots in infected soil, plus clouds of brassica whitefly under leaves. Rotate brassicas, lime to near-neutral pH, and disturb whitefly with regular handling.
Prevent redbor kale problems before they start
Most redbor kale issues are care-mismatch, not bad luck. Dial in the basics:
Looking for redbor kale in general rather than its problems? Read the full redbor kale care guide — light, water, soil and feeding.
Redbor Kale problems — FAQ
Why is my redbor kale cabbage caterpillars?
Cabbage white and looper larvae shred leaves and hide deep in the curls. Use insect-mesh covers, inspect the frilly leaves closely, and hand-pick or treat with Bt.
Why is my redbor kale cabbage aphid?
Grey waxy aphids colonise the dense curls and growing point, where they are hard to dislodge. Use a strong water jet, insecticidal soap and natural predators; check often.
Why is my redbor kale wind rock?
Tall plants on loose soil rock in wind, loosening roots and stunting growth. Plant firmly and deeply, earth up the stem, and stake exposed plants.
Why is my redbor kale clubroot and whitefly?
Swollen distorted roots in infected soil, plus clouds of brassica whitefly under leaves. Rotate brassicas, lime to near-neutral pH, and disturb whitefly with regular handling.