Troubleshooting
Jonkheer van Tets Redcurrant problems — and how to fix them
Jonkheer van Tets Redcurrant (Ribes rubrum 'Jonkheer van Tets') 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.
Currant blister aphid
Causes red or yellow puckered blisters on leaves in spring. Largely cosmetic and rarely harms cropping; squash colonies on leaf undersides or tolerate minor damage.
Coral spot and dieback
Orange-pink pustules on dead wood spreading into the permanent framework. Prune out dead and diseased wood promptly with clean cuts and remove prunings.
Birds and sawfly
Birds strip ripe strigs and gooseberry sawfly larvae can defoliate the bush. Net fruit as it colours and pick off or treat sawfly caterpillars early.
American gooseberry mildew
White powdery growth on shoots and fruit, worse with soft nitrogen-rich growth. Prune for an open centre, feed with potash not excess nitrogen, and ensure airflow.
Prevent jonkheer van tets redcurrant problems before they start
Most jonkheer van tets redcurrant issues are care-mismatch, not bad luck. Dial in the basics:
- Common red currant problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Jonkheer van Tets Redcurrant watering schedule
- Jonkheer van Tets Redcurrant light requirements
- Best soil mix for jonkheer van tets redcurrant
- Jonkheer van Tets Redcurrant temperature & humidity
- Full jonkheer van tets redcurrant care guide
Looking for jonkheer van tets redcurrant in general rather than its problems? Read the full jonkheer van tets redcurrant care guide — light, water, soil and feeding.
Jonkheer van Tets Redcurrant problems — FAQ
Why is my jonkheer van tets redcurrant currant blister aphid?
Causes red or yellow puckered blisters on leaves in spring. Largely cosmetic and rarely harms cropping; squash colonies on leaf undersides or tolerate minor damage.
Why is my jonkheer van tets redcurrant coral spot and dieback?
Orange-pink pustules on dead wood spreading into the permanent framework. Prune out dead and diseased wood promptly with clean cuts and remove prunings.
Why is my jonkheer van tets redcurrant birds and sawfly?
Birds strip ripe strigs and gooseberry sawfly larvae can defoliate the bush. Net fruit as it colours and pick off or treat sawfly caterpillars early.
Why is my jonkheer van tets redcurrant american gooseberry mildew?
White powdery growth on shoots and fruit, worse with soft nitrogen-rich growth. Prune for an open centre, feed with potash not excess nitrogen, and ensure airflow.