Troubleshooting
Rowallane quince problems — and how to fix them
Rowallane quince (Chaenomeles x superba 'Rowallane') 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.
Fireblight (Erwinia amylovora)
Bacterial infection causing shoot tips to wilt and blacken as if burned. Prune well below infected tissue, sterilising blades with 70% isopropyl alcohol between cuts. Burn or bin (do not compost) infected material.
Aphids
Colonies of aphids may cluster on new growth in spring, causing leaf curl and reduced vigour. Encourage natural predators or apply an insecticidal soap spray to affected shoots.
Poor flowering on north walls
Insufficient light reduces flower bud initiation. Relocate container specimens or train to a brighter wall. Hard pruning immediately after flowering to open the structure can also improve the following year's bloom.
Prevent rowallane quince problems before they start
Most rowallane quince issues are care-mismatch, not bad luck. Dial in the basics:
Rowallane quince problems — FAQ
Why is my rowallane quince fireblight (erwinia amylovora)?
Bacterial infection causing shoot tips to wilt and blacken as if burned. Prune well below infected tissue, sterilising blades with 70% isopropyl alcohol between cuts. Burn or bin (do not compost) infected material.
Why is my rowallane quince aphids?
Colonies of aphids may cluster on new growth in spring, causing leaf curl and reduced vigour. Encourage natural predators or apply an insecticidal soap spray to affected shoots.
Why is my rowallane quince poor flowering on north walls?
Insufficient light reduces flower bud initiation. Relocate container specimens or train to a brighter wall. Hard pruning immediately after flowering to open the structure can also improve the following year's bloom.