Repotting guide

When & how to repot Colocasia 'Coffee Cups' (Colocasia esculenta 'Coffee Cups')

Also called Coffee Cups taro, cup-shaped taro.

More about colocasia 'coffee cups'

About Colocasia 'Coffee Cups'

Colocasia esculenta 'Coffee Cups' · also called Coffee Cups taro, cup-shaped taro · tropical

A vigorous taro cultivar whose cupped, upward-curling dark leaves catch rainwater and tip it out when full, on near-black stems. A fast, thirsty bog-margin aroid, it makes a dramatic patio or pondside feature in summer and overwinters as a stored corm where frost is a risk.

Mature size: Around 90-120 cm tall and 60-90 cm wide in a season.

How to tell colocasia 'coffee cups' needs repotting

Repotting on a calendar is less reliable than reading the plant. For colocasia 'coffee cups', 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 colocasia 'coffee cups' 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 colocasia 'coffee cups'

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, colocasia 'coffee cups' is lifted and divided once the clump congests and flowering drops off. Clumping, fast-growing tuberous/cormous tropical perennial; upright dark stems carry distinctive cup-shaped leaves, dying back to a corm in cold winters..

What size pot to step colocasia 'coffee cups' up to

Pot size matters less than depth and spacing here. When you replant colocasia 'coffee cups', 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 colocasia 'coffee cups'

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 colocasia 'coffee cups' in full growth or flower sets it back badly.

Step-by-step: repotting colocasia 'coffee cups'

Wait for dormancy. Let colocasia 'coffee cups' 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 heavy, rich, moisture-retentive soil 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 colocasia 'coffee cups', 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 colocasia 'coffee cups'

Colocasia 'Coffee Cups' wants heavy, rich, moisture-retentive soil. Loves fertile, humus-rich loam that holds water; tolerates clay and waterlogged margins. A heavy potting mix with added compost suits container culture; ordinary free-draining mixes dry out too fast. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting colocasia 'coffee cups' — frequently asked questions

How often should you repot colocasia 'coffee cups'?

Lift and divide every 3–4 years once clumps congest for colocasia 'coffee cups'. Colocasia 'Coffee Cups' 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 heavy, rich, moisture-retentive soil. Crowding, not pot size, is what reduces flowering over time.

What size pot does colocasia 'coffee cups' need?

When is the best time of year to repot colocasia 'coffee cups'?

Do you "repot" colocasia 'coffee cups', or lift and divide it?

You lift and divide it. Colocasia 'Coffee Cups' 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 colocasia 'coffee cups' after repotting?

Hold off feeding colocasia 'coffee cups' 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.