Troubleshooting
Polka Raspberry problems — and how to fix them
Polka Raspberry (Rubus idaeus 'Polka') 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.
Pruning as a summer raspberry
It fruits on the current year's canes. Cut all canes to ground level in late winter; leaving old canes ruins the crop and timing.
Grey mould (botrytis) on heavy trusses
Dense late-season fruit rots in damp weather. Keep the row open for airflow and harvest the abundant berries promptly.
Dry soil during fruiting
The long autumn crop shrinks and hardens if the soil dries. Water steadily and mulch, particularly in containers and hot spells.
Vigorous suckering
Strong suckers spread beyond the intended row. Remove strays or use a root barrier to contain the clump.
Prevent polka raspberry problems before they start
Most polka raspberry issues are care-mismatch, not bad luck. Dial in the basics:
Looking for polka raspberry in general rather than its problems? Read the full polka raspberry care guide — light, water, soil and feeding.
Polka Raspberry problems — FAQ
Why is my polka raspberry pruning as a summer raspberry?
It fruits on the current year's canes. Cut all canes to ground level in late winter; leaving old canes ruins the crop and timing.
Why is my polka raspberry grey mould (botrytis) on heavy trusses?
Dense late-season fruit rots in damp weather. Keep the row open for airflow and harvest the abundant berries promptly.
Why is my polka raspberry dry soil during fruiting?
The long autumn crop shrinks and hardens if the soil dries. Water steadily and mulch, particularly in containers and hot spells.
Why is my polka raspberry vigorous suckering?
Strong suckers spread beyond the intended row. Remove strays or use a root barrier to contain the clump.