Repotting guide

When & how to repot Crown Prince Squash (Cucurbita maxima 'Crown Prince')

Also called Crown Prince squash, Crown Prince pumpkin.

More about crown prince squash

About Crown Prince Squash

Cucurbita maxima 'Crown Prince' · also called Crown Prince squash, Crown Prince pumpkin · edible

Crown Prince is a prized blue-grey skinned winter squash with dense, sweet, nutty orange flesh and outstanding storage life. A vigorous trailing annual, it needs a long warm season, full sun and very rich soil. Fruits are cured after harvest and keep for months, making it a favourite for autumn and winter cooking.

Mature size: Vines 2-3 m long; fruits typically 3-6 kg, occasionally larger.

How to tell crown prince squash needs repotting

Repotting on a calendar is less reliable than reading the plant. For crown prince squash, watch for these signs:

Roots circling the bottom of the module or pot, or poking out of the drainage holes.
The seedling dries out within a day and growth has visibly stalled.
Roots are white and matted in a tight spiral when you tip the plant out.
It has outgrown its current container for the stage of the season — pot crown prince squash on before it becomes hard root-bound.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot crown prince squash

Pot on seedlings as they grow; not a perennial repot. Crown Prince Squashis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Vigorous long-trailing annual vine that sprawls several metres; can be trained over a sturdy support or left to ramble across open ground..

What size pot to step crown prince squash up to

Pot crown prince squash on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot crown prince squash

Pot crown prince squash on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Step-by-step: repotting crown prince squash

Pot on before it is root-bound. Check crown prince squash regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
Pot into rich mix. Set it into fresh deep, very rich, free-draining loam, ph 6.0-6.8 at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water crown prince squash in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for crown prince squash

Crown Prince Squash wants deep, very rich, free-draining loam, ph 6.0-6.8. Plant on a mound of well-rotted manure or mature compost. As a heavy feeder making large fruit, it rewards the richest soil you can give it. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting crown prince squash — frequently asked questions

How often should you repot crown prince squash?

Pot on seedlings as they grow; not a perennial repot for crown prince squash. Crown Prince Squash is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into deep, very rich, free-draining loam, ph 6.0-6.8 so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.

What size pot does crown prince squash need?

When is the best time of year to repot crown prince squash?

Can you put crown prince squash straight into a much bigger pot?

No. Even a fast-growing crown prince squash should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise crown prince squash after repotting?

Not immediately. Wait about 1 week after repotting crown prince squash. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.