Troubleshooting
Solaris Grape problems — and how to fix them
Solaris Grape (Vitis vinifera 'Solaris') 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.
Botrytis and bunch rot
Although mildew-resistant, Solaris ripens early and accumulates high sugars, making clusters prone to botrytis in wet autumns. Thin congested bunches, keep the canopy open, and harvest promptly once ripe.
Early ripening means early pests
Because it ripens ahead of most grapes, Solaris is a magnet for wasps and birds when little other fruit is ready. Net the vines early and remove split or damaged berries quickly.
Over-vigour and dense canopy
Strong growth can shade fruit and trap moisture. Prune hard in dormancy and manage summer growth with leaf removal around the bunches to maintain airflow and sun on the fruit.
Overcropping reducing quality
A reliable cropper, Solaris can set more fruit than it ripens to high quality. Thin bunches to balance the vine so the remaining crop reaches full sugar and flavour.
Prevent solaris grape problems before they start
Most solaris grape issues are care-mismatch, not bad luck. Dial in the basics:
Looking for solaris grape in general rather than its problems? Read the full solaris grape care guide — light, water, soil and feeding.
Solaris Grape problems — FAQ
Why is my solaris grape botrytis and bunch rot?
Although mildew-resistant, Solaris ripens early and accumulates high sugars, making clusters prone to botrytis in wet autumns. Thin congested bunches, keep the canopy open, and harvest promptly once ripe.
Why is my solaris grape early ripening means early pests?
Because it ripens ahead of most grapes, Solaris is a magnet for wasps and birds when little other fruit is ready. Net the vines early and remove split or damaged berries quickly.
Why is my solaris grape over-vigour and dense canopy?
Strong growth can shade fruit and trap moisture. Prune hard in dormancy and manage summer growth with leaf removal around the bunches to maintain airflow and sun on the fruit.
Why is my solaris grape overcropping reducing quality?
A reliable cropper, Solaris can set more fruit than it ripens to high quality. Thin bunches to balance the vine so the remaining crop reaches full sugar and flavour.