Repotting guide

When & how to repot Garland Chrysanthemum 'Shungiku' (Glebionis coronaria 'Shungiku')

Also called shungiku, Japanese greens chrysanthemum, spring chrysanthemum.

More about garland chrysanthemum 'shungiku'

About Garland Chrysanthemum 'Shungiku'

Glebionis coronaria 'Shungiku' · also called shungiku, Japanese greens chrysanthemum · edible

'Shungiku' is the classic Japanese culinary selection of garland chrysanthemum (Glebionis coronaria), grown for fragrant, lobed young leaves used in hotpots, stir-fries and ohitashi. A quick cool-season annual in the daisy family, it bolts to yellow daisy flowers in heat. Cut shoots young for a mild, herbal-bitter flavour that strengthens sharply once the plant starts to flower.

Mature size: 30-90 cm tall when flowering; harvest shoots at 10-20 cm.

How to tell garland chrysanthemum 'shungiku' needs repotting

Repotting on a calendar is less reliable than reading the plant. For garland chrysanthemum 'shungiku', 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 garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku'

Pot on seedlings as they grow; not a perennial repot. Garland Chrysanthemum 'Shungiku'is 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 finely lobed, aromatic leaves; flushes yellow daisy flowers once it bolts, after which leaves toughen..

What size pot to step garland chrysanthemum 'shungiku' up to

Pot garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku'

Pot garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku'

Pot on before it is root-bound. Check garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku'

Garland Chrysanthemum 'Shungiku' wants fertile, well-drained loam, ph 6.0-7.0. Tolerant but best in compost-enriched, moisture-retentive soil with free drainage. Avoid heavy, waterlogged ground that rots the shallow roots. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting garland chrysanthemum 'shungiku' — frequently asked questions

How often should you repot garland chrysanthemum 'shungiku'?

Pot on seedlings as they grow; not a perennial repot for garland chrysanthemum 'shungiku'. Garland Chrysanthemum 'Shungiku' 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 garland chrysanthemum 'shungiku' need?

When is the best time of year to repot garland chrysanthemum 'shungiku'?

Can you put garland chrysanthemum 'shungiku' straight into a much bigger pot?

No. Even a fast-growing garland chrysanthemum 'shungiku' 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 garland chrysanthemum 'shungiku' after repotting?

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