Troubleshooting
Grape 'Reliance' problems — and how to fix them
Grape 'Reliance' (Vitis labrusca 'Reliance') 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.
Berry cracking and splitting
'Reliance' has tender skin and tends to crack after rain near harvest. Maintain even moisture and pick promptly as berries ripen.
Powdery and downy mildew
Common in humid conditions on leaves and fruit. Prune for airflow, site in full sun, and apply preventive fungicide where pressure is high.
Black rot
Leaf spots and shrivelled mummified berries. Sanitise by removing mummies and fallen debris and treat early in wet springs.
Birds and wasps
Sweet seedless berries are a magnet for birds and wasps. Net clusters as they colour and remove damaged fruit.
Prevent grape 'reliance' problems before they start
Most grape 'reliance' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for grape 'reliance' in general rather than its problems? Read the full grape 'reliance' care guide — light, water, soil and feeding.
Grape 'Reliance' problems — FAQ
Why is my grape 'reliance' berry cracking and splitting?
'Reliance' has tender skin and tends to crack after rain near harvest. Maintain even moisture and pick promptly as berries ripen.
Why is my grape 'reliance' powdery and downy mildew?
Common in humid conditions on leaves and fruit. Prune for airflow, site in full sun, and apply preventive fungicide where pressure is high.
Why is my grape 'reliance' black rot?
Leaf spots and shrivelled mummified berries. Sanitise by removing mummies and fallen debris and treat early in wet springs.
Why is my grape 'reliance' birds and wasps?
Sweet seedless berries are a magnet for birds and wasps. Net clusters as they colour and remove damaged fruit.