Troubleshooting
Crown Prince Squash problems — and how to fix them
Crown Prince Squash (Cucurbita maxima 'Crown Prince') 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.
Short season shortfall
In cool regions fruit may not ripen fully; start early under cover and limit each plant to a few fruits so they mature.
Powdery mildew
Common on the large leaves by late summer; space plants, water at the base, and remove badly affected foliage.
Slug and snail damage
Seedlings and young fruit are vulnerable; protect transplants and lift developing fruit onto tiles or straw.
Poor storage
Uncured fruit rots in store; cure in warmth for about ten days after harvest and keep in a cool, dry, airy place.
Prevent crown prince squash problems before they start
Most crown prince squash issues are care-mismatch, not bad luck. Dial in the basics:
- Common atlantic giant pumpkin problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Crown Prince Squash watering schedule
- Crown Prince Squash light requirements
- Best soil mix for crown prince squash
- Crown Prince Squash temperature & humidity
- Full crown prince squash care guide
Looking for crown prince squash in general rather than its problems? Read the full crown prince squash care guide — light, water, soil and feeding.
Crown Prince Squash problems — FAQ
Why is my crown prince squash short season shortfall?
In cool regions fruit may not ripen fully; start early under cover and limit each plant to a few fruits so they mature.
Why is my crown prince squash powdery mildew?
Common on the large leaves by late summer; space plants, water at the base, and remove badly affected foliage.
Why is my crown prince squash slug and snail damage?
Seedlings and young fruit are vulnerable; protect transplants and lift developing fruit onto tiles or straw.
Why is my crown prince squash poor storage?
Uncured fruit rots in store; cure in warmth for about ten days after harvest and keep in a cool, dry, airy place.