Repotting guide

When & how to repot Chrysanthemum Greens (Glebionis coronaria)

Also called chrysanthemum greens, shungiku, edible chrysanthemum, garland chrysanthemum.

More about chrysanthemum greens

About Chrysanthemum Greens

Glebionis coronaria · also called chrysanthemum greens, shungiku · edible

Chrysanthemum greens (Glebionis coronaria, shungiku) are an annual leafy herb in the daisy family grown for their aromatic, slightly bitter young leaves and shoots used in East Asian cooking. Fast and cool-season, they bolt readily in heat into daisy-like yellow flowers. Harvest tender tips young and often; flavour turns strong and resinous once plants begin to flower.

Mature size: 30-90 cm tall if left to flower; harvest leafy shoots at 10-20 cm.

How to tell chrysanthemum greens needs repotting

Repotting on a calendar is less reliable than reading the plant. For chrysanthemum greens, 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 chrysanthemum greens 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 chrysanthemum greens

Pot on seedlings as they grow; not a perennial repot. Chrysanthemum Greensis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Upright, branching annual with deeply lobed, feathery aromatic leaves; produces yellow or yellow-and-white daisy flowers once it bolts..

What size pot to step chrysanthemum greens up to

Pot chrysanthemum greens 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 chrysanthemum greens

Pot chrysanthemum greens 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 chrysanthemum greens

Pot on before it is root-bound. Check chrysanthemum greens 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, ph 6.0-7.0 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 chrysanthemum greens 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 chrysanthemum greens

Chrysanthemum Greens wants fertile, well-drained loam, ph 6.0-7.0. Adaptable but most productive in moisture-retentive soil enriched with compost. Good drainage prevents root rot in cool, wet conditions. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting chrysanthemum greens — frequently asked questions

How often should you repot chrysanthemum greens?

Pot on seedlings as they grow; not a perennial repot for chrysanthemum greens. Chrysanthemum Greens 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, ph 6.0-7.0 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 chrysanthemum greens need?

When is the best time of year to repot chrysanthemum greens?

Can you put chrysanthemum greens straight into a much bigger pot?

No. Even a fast-growing chrysanthemum greens 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 chrysanthemum greens after repotting?

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