Repotting guide

When & how to repot 'Castelfranco' Radicchio (Cichorium intybus var. foliosum 'Castelfranco')

Also called Castelfranco radicchio, Variegated chicory.

More about 'castelfranco' radicchio

About 'Castelfranco' Radicchio

Cichorium intybus var. foliosum 'Castelfranco' · also called Castelfranco radicchio, Variegated chicory · edible

'Castelfranco' is an Italian heirloom radicchio forming a loose, rose-like head of cream and pale-green leaves speckled with wine-red flecks. A cool-season chicory, it develops its prized colour and mild, gently bitter sweetness as autumn temperatures drop, sometimes after blanching. It matures in about 80-90 days in fertile, moisture-retentive soil and full sun to part shade.

Mature size: Heads 15-25cm (6-10in) across; 20-30cm (8-12in) tall

How to tell 'castelfranco' radicchio needs repotting

Repotting on a calendar is less reliable than reading the plant. For 'castelfranco' radicchio, 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 'castelfranco' radicchio 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 'castelfranco' radicchio

Pot on seedlings as they grow; not a perennial repot. 'Castelfranco' Radicchiois grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Rosette-forming leafy chicory that opens into a loose, open, rose-shaped head rather than a tight ball. Outer leaves can be tied up or covered to blanch the heart, deepening the cream colour and softening the bitterness as it matures into cool weather..

What size pot to step 'castelfranco' radicchio up to

Pot 'castelfranco' radicchio 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 'castelfranco' radicchio

Pot 'castelfranco' radicchio 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 'castelfranco' radicchio

Pot on before it is root-bound. Check 'castelfranco' radicchio 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 fertile, well-drained loam high in organic matter, 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 'castelfranco' radicchio 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 'castelfranco' radicchio

'Castelfranco' Radicchio wants fertile, well-drained loam high in organic matter, ph 6.0-6.8. Prefers rich, free-draining soil enriched with compost. Loose, fertile ground supports leafy growth and good heading; heavy, compacted or waterlogged soils invite rot and patchy hearts. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting 'castelfranco' radicchio — frequently asked questions

How often should you repot 'castelfranco' radicchio?

Pot on seedlings as they grow; not a perennial repot for 'castelfranco' radicchio. 'Castelfranco' Radicchio is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into fertile, well-drained loam high in organic matter, 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 'castelfranco' radicchio need?

When is the best time of year to repot 'castelfranco' radicchio?

Can you put 'castelfranco' radicchio straight into a much bigger pot?

No. Even a fast-growing 'castelfranco' radicchio 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 'castelfranco' radicchio after repotting?

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