Troubleshooting
Morello Cherry problems — and how to fix them
Morello Cherry (Prunus cerasus 'Morello') 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.
Bacterial canker
Gummy, sunken bark lesions and leaf shot-holes can girdle and kill branches, a key sour-cherry problem. Prune in dry summer weather, cut out infected wood and keep trees healthy.
Brown rot
Fruit develops brown patches with buff spore rings, worse in shaded, humid wall positions. Remove infected and mummified fruit and thin for airflow.
Bird damage
Even sour cherries are taken by birds as they ripen. Net trees as the fruit colours to protect the crop.
Poor cropping from wrong pruning
Morello fruits on the previous year's growth, so hard spur-pruning removes the crop. Renewal-prune after harvest, cutting back fruited wood to encourage new shoots.
Prevent morello cherry problems before they start
Most morello cherry issues are care-mismatch, not bad luck. Dial in the basics:
Looking for morello cherry in general rather than its problems? Read the full morello cherry care guide — light, water, soil and feeding.
Morello Cherry problems — FAQ
Why is my morello cherry bacterial canker?
Gummy, sunken bark lesions and leaf shot-holes can girdle and kill branches, a key sour-cherry problem. Prune in dry summer weather, cut out infected wood and keep trees healthy.
Why is my morello cherry brown rot?
Fruit develops brown patches with buff spore rings, worse in shaded, humid wall positions. Remove infected and mummified fruit and thin for airflow.
Why is my morello cherry bird damage?
Even sour cherries are taken by birds as they ripen. Net trees as the fruit colours to protect the crop.
Why is my morello cherry poor cropping from wrong pruning?
Morello fruits on the previous year's growth, so hard spur-pruning removes the crop. Renewal-prune after harvest, cutting back fruited wood to encourage new shoots.