Repotting guide

When & how to repot Zantedeschia elliottiana (Zantedeschia elliottiana)

Also called Golden Calla Lily, Yellow Calla Lily.

More about zantedeschia elliottiana

About Zantedeschia elliottiana

Zantedeschia elliottiana · also called Golden Calla Lily, Yellow Calla Lily · flowering

Zantedeschia elliottiana is the golden calla lily, a summer-flowering tuberous aroid prized for funnel-shaped yellow spathes above silver-spotted, arrow-shaped leaves. Unlike the evergreen Z. aethiopica, it is deciduous, dying back after flowering to a dormant tuber. It thrives in rich, moist soil and bright light, going fully dormant through winter.

Mature size: 60-90 cm tall and 30-45 cm wide in a clump; flower stems reach the upper end of that range.

Watch for — No flowers: Too little light or excess nitrogen yields leaves but few spathes. Give brighter light and switch to a higher-potassium feed during the growing season.

How to tell zantedeschia elliottiana needs repotting

Repotting on a calendar is less reliable than reading the plant. For zantedeschia elliottiana, 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 zantedeschia elliottiana 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 zantedeschia elliottiana

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, zantedeschia elliottiana is lifted and divided once the clump congests and flowering drops off. Clump-forming, deciduous tuberous perennial. Sends up upright, arrow-shaped leaves on long petioles from an underground tuber, with single funnel-shaped spathes held above the foliage in summer, then dies back to dormancy..

What size pot to step zantedeschia elliottiana up to

Pot size matters less than depth and spacing here. When you replant zantedeschia elliottiana, 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 zantedeschia elliottiana

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 zantedeschia elliottiana in full growth or flower sets it back badly.

Step-by-step: repotting zantedeschia elliottiana

Wait for dormancy. Let zantedeschia elliottiana 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 rich, humus-heavy, moisture-retentive but free-draining mix 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 zantedeschia elliottiana, 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 zantedeschia elliottiana

Zantedeschia elliottiana wants rich, humus-heavy, moisture-retentive but free-draining mix. Use a fertile loam-based mix enriched with compost and a little grit for drainage. Plant tubers 5-10 cm deep, eye upward. A pH around 6.0-6.5 suits it; heavy, compacted soil that stays sodden encourages soft rot of the tuber. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting zantedeschia elliottiana — frequently asked questions

How often should you repot zantedeschia elliottiana?

Lift and divide every 3–4 years once clumps congest for zantedeschia elliottiana. Zantedeschia elliottiana 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 rich, humus-heavy, moisture-retentive but free-draining mix. Crowding, not pot size, is what reduces flowering over time.

What size pot does zantedeschia elliottiana need?

When is the best time of year to repot zantedeschia elliottiana?

Do you "repot" zantedeschia elliottiana, or lift and divide it?

You lift and divide it. Zantedeschia elliottiana 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 zantedeschia elliottiana after repotting?

Hold off feeding zantedeschia elliottiana 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.