Troubleshooting
Crataegus laevigata 'Paul's Scarlet' problems — and how to fix them
Crataegus laevigata 'Paul's Scarlet' (Crataegus laevigata 'Paul's Scarlet') 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.
Hawthorn leaf spot / scab
Fungal leaf spot and scab (Diplocarpon, Venturia) can blotch foliage and cause early leaf drop in wet summers. Rake up fallen leaves and improve airflow; rarely threatens an established tree.
Fireblight
Susceptible to fireblight (Erwinia amylovora), which blackens shoots and flower trusses as if scorched. Prune out infected wood well into healthy tissue and disinfect tools between cuts.
Powdery mildew
Grey-white coating on leaves and shoots in dry, still conditions. Usually cosmetic; improve air movement and avoid drought stress to reduce recurrence.
Sharp thorns
The stout thorns can injure people and pets and make pruning awkward. Site away from paths and play areas, and wear thick gloves when working on the tree.
Prevent crataegus laevigata 'paul's scarlet' problems before they start
Most crataegus laevigata 'paul's scarlet' issues are care-mismatch, not bad luck. Dial in the basics:
- What's wrong with my plant? — the diagnosis apps compared
- Crataegus laevigata 'Paul's Scarlet' watering schedule
- Crataegus laevigata 'Paul's Scarlet' light requirements
- Best soil mix for crataegus laevigata 'paul's scarlet'
- Crataegus laevigata 'Paul's Scarlet' temperature & humidity
- Full crataegus laevigata 'paul's scarlet' care guide
Looking for crataegus laevigata 'paul's scarlet' in general rather than its problems? Read the full crataegus laevigata 'paul's scarlet' care guide — light, water, soil and feeding.
Crataegus laevigata 'Paul's Scarlet' problems — FAQ
Why is my crataegus laevigata 'paul's scarlet' hawthorn leaf spot / scab?
Fungal leaf spot and scab (Diplocarpon, Venturia) can blotch foliage and cause early leaf drop in wet summers. Rake up fallen leaves and improve airflow; rarely threatens an established tree.
Why is my crataegus laevigata 'paul's scarlet' fireblight?
Susceptible to fireblight (Erwinia amylovora), which blackens shoots and flower trusses as if scorched. Prune out infected wood well into healthy tissue and disinfect tools between cuts.
Why is my crataegus laevigata 'paul's scarlet' powdery mildew?
Grey-white coating on leaves and shoots in dry, still conditions. Usually cosmetic; improve air movement and avoid drought stress to reduce recurrence.
Why is my crataegus laevigata 'paul's scarlet' sharp thorns?
The stout thorns can injure people and pets and make pruning awkward. Site away from paths and play areas, and wear thick gloves when working on the tree.