Troubleshooting
Cobaea scandens problems — and how to fix them
Cobaea scandens (Cobaea scandens) 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.
All leaves, few flowers
Too much nitrogen or too little sun drives lush foliage with sparse bloom. Grow in full sun, keep feeding lean, and switch to a high-potash fertiliser.
Frost kills the plant
It is tender and dies at the first frost. Sow under glass in spring, plant out only after frosts, and treat it as an annual in cool climates.
Slow, erratic germination
The flat seeds can rot if sown too wet. Sow on edge in spring under warmth, keep barely moist, and be patient as germination is uneven.
Aphids and slugs
Aphids attack soft tips and slugs graze young plants. Protect seedlings from slugs and control aphids early by hosing off or encouraging predators.
Prevent cobaea scandens problems before they start
Most cobaea scandens issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cobaea scandens in general rather than its problems? Read the full cobaea scandens care guide — light, water, soil and feeding.
Cobaea scandens problems — FAQ
Why is my cobaea scandens all leaves, few flowers?
Too much nitrogen or too little sun drives lush foliage with sparse bloom. Grow in full sun, keep feeding lean, and switch to a high-potash fertiliser.
Why is my cobaea scandens frost kills the plant?
It is tender and dies at the first frost. Sow under glass in spring, plant out only after frosts, and treat it as an annual in cool climates.
Why is my cobaea scandens slow, erratic germination?
The flat seeds can rot if sown too wet. Sow on edge in spring under warmth, keep barely moist, and be patient as germination is uneven.
Why is my cobaea scandens aphids and slugs?
Aphids attack soft tips and slugs graze young plants. Protect seedlings from slugs and control aphids early by hosing off or encouraging predators.