Repotting guide

When & how to repot Zantedeschia albomaculata (Zantedeschia albomaculata)

Also called spotted-leaf calla lily, white spot calla.

More about zantedeschia albomaculata

About Zantedeschia albomaculata

Zantedeschia albomaculata · also called spotted-leaf calla lily, white spot calla · flowering

Zantedeschia albomaculata is a variable South African species calla with creamy white to pale yellow spathes marked by a dark purple throat, above narrow green leaves heavily flecked with translucent white spots. A summer-growing deciduous tuber, it blooms in summer then rests dry. Give bright light, moist free-draining soil in growth, and a dry dormancy; it reaches about 60-90 cm.

Mature size: About 60-90 cm tall and 30-40 cm wide.

How to tell zantedeschia albomaculata needs repotting

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

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, zantedeschia albomaculata is lifted and divided once the clump congests and flowering drops off. Deciduous, tuberous perennial forming an upright clump of narrow, white-spotted arrow-shaped leaves with slender stems each carrying one pale spathe..

What size pot to step zantedeschia albomaculata up to

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

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 albomaculata in full growth or flower sets it back badly.

Step-by-step: repotting zantedeschia albomaculata

Wait for dormancy. Let zantedeschia albomaculata 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, free-draining loam-based or multipurpose 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 albomaculata, 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 albomaculata

Zantedeschia albomaculata wants fertile, free-draining loam-based or multipurpose mix. A rich but sharply drained mix, slightly acidic to neutral. This summer-rainfall species needs free drainage and a dry rest; it is more drought- and drainage-tolerant than the bog-loving white arum lily. 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 albomaculata — frequently asked questions

How often should you repot zantedeschia albomaculata?

Lift and divide every 3–4 years once clumps congest for zantedeschia albomaculata. Zantedeschia albomaculata 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, free-draining loam-based or multipurpose mix. Crowding, not pot size, is what reduces flowering over time.

What size pot does zantedeschia albomaculata need?

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

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

You lift and divide it. Zantedeschia albomaculata 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 albomaculata after repotting?

Hold off feeding zantedeschia albomaculata 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.