Repotting guide

When & how to repot Colocasia Colocasia Gigantea Thailand Giant (Colocasia gigantea 'Thailand Giant')

Also called Thailand Giant elephant ear, Thailand Giant taro.

More about colocasia colocasia gigantea thailand giant

About Colocasia Colocasia Gigantea Thailand Giant

Colocasia gigantea 'Thailand Giant' · also called Thailand Giant elephant ear, Thailand Giant taro · tropical

Colocasia gigantea 'Thailand Giant' is one of the largest elephant ears, producing immense, soft blue-green leaves on towering stems that can dwarf a person. A water-loving bog plant, it craves heat, full sun to part shade, rich constantly moist soil and high humidity, and heavy feeding. Cold, dry conditions stall its spectacular growth.

Mature size: Up to 2.5-3 m tall and as wide; individual leaves can exceed 1.5 m long.

Watch for — Wind damage to large leaves: The enormous soft leaves shred in strong wind. Site it in a sheltered spot to keep the dramatic foliage intact.

How to tell colocasia colocasia gigantea thailand giant needs repotting

Repotting on a calendar is less reliable than reading the plant. For colocasia colocasia gigantea thailand giant, 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 colocasia gigantea thailand giant 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 colocasia gigantea thailand giant

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, colocasia colocasia gigantea thailand giant is lifted and divided once the clump congests and flowering drops off. Massive clumping tuberous perennial forming an upright clump of giant leaves on tall petioles; bulks up a large central tuber and offsets at the base..

What size pot to step colocasia colocasia gigantea thailand giant up to

Pot size matters less than depth and spacing here. When you replant colocasia colocasia gigantea thailand giant, 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 colocasia gigantea thailand giant

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 colocasia gigantea thailand giant in full growth or flower sets it back badly.

Step-by-step: repotting colocasia colocasia gigantea thailand giant

Wait for dormancy. Let colocasia colocasia gigantea thailand giant 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 very rich, heavy, water-retentive loam 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 colocasia gigantea thailand giant, 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 colocasia gigantea thailand giant

Colocasia Colocasia Gigantea Thailand Giant wants very rich, heavy, water-retentive loam. Use a deep, fertile, humus-rich mix with plenty of compost or rotted manure; it tolerates clay and waterlogging and grows happily in shallow pond margins. Lean, dry soil severely limits its size. 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 colocasia gigantea thailand giant — frequently asked questions

How often should you repot colocasia colocasia gigantea thailand giant?

Lift and divide every 3–4 years once clumps congest for colocasia colocasia gigantea thailand giant. Colocasia Colocasia Gigantea Thailand Giant 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 very rich, heavy, water-retentive loam. Crowding, not pot size, is what reduces flowering over time.

What size pot does colocasia colocasia gigantea thailand giant need?

When is the best time of year to repot colocasia colocasia gigantea thailand giant?

Do you "repot" colocasia colocasia gigantea thailand giant, or lift and divide it?

You lift and divide it. Colocasia Colocasia Gigantea Thailand Giant 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 colocasia gigantea thailand giant after repotting?

Hold off feeding colocasia colocasia gigantea thailand giant 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.