Repotting guide

When & how to repot Zantedeschia 'Hot Chocolate' (Zantedeschia 'Hot Chocolate')

Also called Hot Chocolate calla lily, chocolate-maroon calla.

More about zantedeschia 'hot chocolate'

About Zantedeschia 'Hot Chocolate'

Zantedeschia 'Hot Chocolate' · also called Hot Chocolate calla lily, chocolate-maroon calla · flowering

Zantedeschia 'Hot Chocolate' is a hybrid calla lily with rich brown to maroon spathes flushed ruby, set against dark green foliage. This tender tuberous perennial wants warmth, bright light and fertile, moist, free-draining soil. Lift and store the rhizome dry in frost-prone areas. A bold container and border plant reaching roughly 50-75 cm.

Mature size: Roughly 50-75 cm tall with a 30-45 cm spread.

Watch for — Sparse flowering: Low light or high-nitrogen feeding favours leaves. Move to brighter light and use a potassium-rich feed to encourage the chocolate spathes.

How to tell zantedeschia 'hot chocolate' needs repotting

Repotting on a calendar is less reliable than reading the plant. For zantedeschia 'hot chocolate', watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for zantedeschia 'hot chocolate') flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 'hot chocolate'

Only every 2–4 years, when genuinely crowded. Zantedeschia 'Hot Chocolate' is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Tender rhizomatous perennial making an upright clump of lance-shaped leaves with trumpet-shaped spathes on stiff stems; dies back to the rhizome over winter..

What size pot to step zantedeschia 'hot chocolate' up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Zantedeschia 'Hot Chocolate' positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping zantedeschia 'hot chocolate' into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 'hot chocolate'

Early spring, just as new growth restarts, is the ideal window for zantedeschia 'hot chocolate'. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting zantedeschia 'hot chocolate'

Confirm it actually needs it. Slide zantedeschia 'hot chocolate' out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip zantedeschia 'hot chocolate' out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh fertile, moisture-retentive yet free-draining loam or potting mix, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water zantedeschia 'hot chocolate' again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for zantedeschia 'hot chocolate'

Zantedeschia 'Hot Chocolate' wants fertile, moisture-retentive yet free-draining loam or potting mix. Enrich with compost and add grit or perlite for drainage. Plant rhizomes 5-10 cm deep with eyes facing up. A slightly acidic to neutral pH is ideal; avoid heavy clay that holds water. 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 'hot chocolate' — frequently asked questions

How often should you repot zantedeschia 'hot chocolate'?

Only every 2–4 years, when genuinely crowded for zantedeschia 'hot chocolate'. Only repot zantedeschia 'hot chocolate' every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using fertile, moisture-retentive yet free-draining loam or potting mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does zantedeschia 'hot chocolate' need?

When is the best time of year to repot zantedeschia 'hot chocolate'?

Does zantedeschia 'hot chocolate' like to be root-bound?

Yes — zantedeschia 'hot chocolate' genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise zantedeschia 'hot chocolate' after repotting?

Not immediately. Wait about 4 weeks after repotting zantedeschia 'hot chocolate'. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.