Repotting guide

When & how to repot Crocosmia × crocosmiiflora 'Jackanapes' (Crocosmia × crocosmiiflora 'Jackanapes')

Also called Jackanapes crocosmia, bicolour crocosmia.

More about crocosmia × crocosmiiflora 'jackanapes'

About Crocosmia × crocosmiiflora 'Jackanapes'

Crocosmia × crocosmiiflora 'Jackanapes' · also called Jackanapes crocosmia, bicolour crocosmia · flowering

A striking cormous perennial grown for its bicoloured, upward-facing flowers in bold orange-red and yellow, carried on wiry, arching sprays above sword-shaped, pleated foliage in mid to late summer. It forms spreading clumps from corms, brings hot late-season colour and pollinators to borders, and tolerates a wide range of soils given decent drainage.

Mature size: 50-70 cm tall, spreading 20-40 cm and bulking up into wider clumps over years.

Watch for — Poor flowering: Caused by congestion, deep shade, or overcrowded corms. Divide tight clumps, move into more sun, and feed with potash before bloom.

How to tell crocosmia × crocosmiiflora 'jackanapes' needs repotting

Repotting on a calendar is less reliable than reading the plant. For crocosmia × crocosmiiflora 'jackanapes', watch for these signs:

Flowering has tailed off year on year and the clump has become congested and overcrowded.
Lots of leaf and few flowers — a classic sign that crocosmia × crocosmiiflora 'jackanapes' bulbs or tubers need lifting and dividing.
Bulbs visibly bursting the pot or pushing each other to the surface.
It is the natural dormancy window (foliage yellowed and died back) — the only safe time to lift and split.

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 crocosmia × crocosmiiflora 'jackanapes'

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, crocosmia × crocosmiiflora 'jackanapes' is lifted and divided once the clump congests and flowering drops off. Clump-forming cormous perennial spreading by stoloniferous corm chains; erect fans of sword-shaped leaves with arching, branched flower sprays held above the foliage..

What size pot to step crocosmia × crocosmiiflora 'jackanapes' up to

Pot size matters less than depth and spacing here. When you replant crocosmia × crocosmiiflora 'jackanapes', set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one.

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 crocosmia × crocosmiiflora 'jackanapes'

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing crocosmia × crocosmiiflora 'jackanapes' in full growth or flower sets it back badly.

Step-by-step: repotting crocosmia × crocosmiiflora 'jackanapes'

Wait for dormancy. Let crocosmia × crocosmiiflora 'jackanapes' foliage yellow and die back completely. Lifting while it is in growth wastes the energy it is storing for next year.
Lift carefully. Loosen the soil well away from the bulbs/tubers with a fork and ease the whole clump out without spearing them.
Separate the offsets. Gently pull the clump apart into individual bulbs or tubers. Keep only firm, healthy, blemish-free ones.
Replant at the right depth. Reset them in fresh fertile, moist but well-drained loam, neutral to slightly acidic at the correct depth and spacing — not touching — so each has room to bulk up.
Water in and rest. Water once to settle them, then keep on the dry side until growth resumes. Do not feed until leaves are actively growing.

Aftercare

After replanting crocosmia × crocosmiiflora 'jackanapes', keep the soil barely moist — not wet — until shoots appear; bulbs and tubers rot in cold, saturated soil. Once leaves are growing strongly, resume normal watering. Hold off feeding until the plant is in active growth again.

The right soil mix for crocosmia × crocosmiiflora 'jackanapes'

Crocosmia × crocosmiiflora 'Jackanapes' wants fertile, moist but well-drained loam, neutral to slightly acidic. Adaptable to most soils with reasonable drainage. Add organic matter on light soils to hold moisture; sharp winter drainage helps the corms survive cold, wet ground. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting crocosmia × crocosmiiflora 'jackanapes' — frequently asked questions

How often should you repot crocosmia × crocosmiiflora 'jackanapes'?

Lift and divide every 3–4 years once clumps congest for crocosmia × crocosmiiflora 'jackanapes'. Crocosmia × crocosmiiflora 'Jackanapes' is lifted and divided, not "repotted". Every 3–4 years, once the foliage has died back and it is dormant, lift the clump, separate the offsets, and replant at the correct depth in fertile, moist but well-drained loam, neutral to slightly acidic. Crowding, not pot size, is what reduces flowering over time.

What size pot does crocosmia × crocosmiiflora 'jackanapes' need?

When is the best time of year to repot crocosmia × crocosmiiflora 'jackanapes'?

Do you "repot" crocosmia × crocosmiiflora 'jackanapes', or lift and divide it?

You lift and divide it. Crocosmia × crocosmiiflora 'Jackanapes' grows from bulbs or tubers, so instead of repotting you wait for dormancy, lift the congested clump, separate the healthy offsets, and replant them at the right depth and spacing. Doing this every 3–4 years restores flowering.

Should you fertilise crocosmia × crocosmiiflora 'jackanapes' after repotting?

Hold off feeding crocosmia × crocosmiiflora 'jackanapes' until it is in active growth again. Fresh soil already carries enough nutrients to get it re-established, and feeding disturbed roots too soon does more harm than good.