Troubleshooting
Prunus subhirtella 'Autumnalis' problems — and how to fix them
Prunus subhirtella 'Autumnalis' (Prunus subhirtella 'Autumnalis') 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
Causes gummy bark lesions and dieback; prune affected branches in dry summer weather and avoid wounding in winter.
Silver leaf
Fungal infection giving silvered leaves and branch dieback; prune only in summer to minimise spore entry.
Frosted flowers
Winter blooms are damaged by hard frosts, but the staggered flushing means fresh flowers reopen during the next mild spell.
Aphids and blackfly
Curl and distort spring foliage with honeydew; generally controlled by natural predators or a wash-off of heavy colonies.
Prevent prunus subhirtella 'autumnalis' problems before they start
Most prunus subhirtella 'autumnalis' issues are care-mismatch, not bad luck. Dial in the basics:
- What's wrong with my plant? — the diagnosis apps compared
- Prunus subhirtella 'Autumnalis' watering schedule
- Prunus subhirtella 'Autumnalis' light requirements
- Best soil mix for prunus subhirtella 'autumnalis'
- Prunus subhirtella 'Autumnalis' temperature & humidity
- Full prunus subhirtella 'autumnalis' care guide
Looking for prunus subhirtella 'autumnalis' in general rather than its problems? Read the full prunus subhirtella 'autumnalis' care guide — light, water, soil and feeding.
Prunus subhirtella 'Autumnalis' problems — FAQ
Why is my prunus subhirtella 'autumnalis' bacterial canker?
Causes gummy bark lesions and dieback; prune affected branches in dry summer weather and avoid wounding in winter.
Why is my prunus subhirtella 'autumnalis' silver leaf?
Fungal infection giving silvered leaves and branch dieback; prune only in summer to minimise spore entry.
Why is my prunus subhirtella 'autumnalis' frosted flowers?
Winter blooms are damaged by hard frosts, but the staggered flushing means fresh flowers reopen during the next mild spell.
Why is my prunus subhirtella 'autumnalis' aphids and blackfly?
Curl and distort spring foliage with honeydew; generally controlled by natural predators or a wash-off of heavy colonies.