Troubleshooting
Crabapple 'John Downie' problems — and how to fix them
Crabapple 'John Downie' (Malus 'John Downie') 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.
Apple scab
'John Downie' is fairly susceptible; expect leaf and fruit spotting in wet years and clear fallen leaves to reduce overwintering spores.
Fireblight
Blackened, wilted shoot tips signal this bacterial disease; prune out well below the infection and sterilise tools to stop spread.
Premature fruit drop
Drought stress during fruit swell can cause early drop; water deeply in dry summers to hold the crop.
Aphids on new growth
Spring aphids curl young leaves and leave honeydew; usually controlled by predators, so avoid spraying unless infestation is heavy.
Prevent crabapple 'john downie' problems before they start
Most crabapple 'john downie' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for crabapple 'john downie' in general rather than its problems? Read the full crabapple 'john downie' care guide — light, water, soil and feeding.
Crabapple 'John Downie' problems — FAQ
Why is my crabapple 'john downie' apple scab?
'John Downie' is fairly susceptible; expect leaf and fruit spotting in wet years and clear fallen leaves to reduce overwintering spores.
Why is my crabapple 'john downie' fireblight?
Blackened, wilted shoot tips signal this bacterial disease; prune out well below the infection and sterilise tools to stop spread.
Why is my crabapple 'john downie' premature fruit drop?
Drought stress during fruit swell can cause early drop; water deeply in dry summers to hold the crop.
Why is my crabapple 'john downie' aphids on new growth?
Spring aphids curl young leaves and leave honeydew; usually controlled by predators, so avoid spraying unless infestation is heavy.