Repotting guide

When & how to repot Impala Lily (Adenium multiflorum)

Also called Impala Lily, Sabi Star, Desert Rose, Mock Azalea.

More about impala lily

About Impala Lily

Adenium multiflorum · also called Impala Lily, Sabi Star · tropical

Impala Lily is a spectacular deciduous succulent from southern Africa that bears masses of boldly bicoloured white and red trumpet flowers on bare branches during its long winter dormancy. Prized as a garden specimen in USDA zones 10–11 and as a container plant elsewhere, it demands excellent drainage, full sun, and a dry, cool dormancy period. All parts are toxic, with traditional use as fish and arrow poison.

Mature size: 50 cm–3 m (1.6–10 ft) tall depending on conditions; typically 60–90 cm (2–3 ft) in containers

Watch for — Root rot during dormancy: The most common cause of death in cultivation. During the obligatory autumn-winter dormancy, the plant is leafless and any soil moisture leads to rapid caudex rot. Keep the plant completely dry from leaf fall until new growth emerges in late winter. If soft, dark tissue appears on the caudex, cut it out immediately, dust with sulphur, and allow to dry.

How to tell impala lily needs repotting

Repotting on a calendar is less reliable than reading the plant. For impala lily, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 impala lily

Every 2–3 years, into bone-dry mix. Impala Lily's growth habit — deciduous succulent shrub or small tree with swollen caudex — sets the pace. Impala Lily is a spectacular deciduous succulent from southern Africa that bears masses of boldly bicoloured white and red trumpet flowers on bare branches during its long winter dormancy. Prized as a garden specimen in USDA zones 10–11 and as a container plant elsewhere, it demands excellent drainage, full sun, and a dry, cool dormancy period. All parts are toxic, with traditional use as fish and arrow poison.

What size pot to step impala lily up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Impala Lily stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 impala lily

Spring or summer, while impala lily is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting impala lily

Repot dry. Do not water impala lily for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty sandy, fast-draining cactus or succulent mix ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set impala lily at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep impala lily completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for impala lily

Impala Lily wants sandy, fast-draining cactus or succulent mix. Plant in a sandy, very well-draining mix such as equal parts potting soil, coarse sand, and perlite. The natural habitat is sandy, rocky, well-drained soils in full sun. A slightly acidic to neutral pH (6.0–7.0) is ideal. Always use pots with drainage holes; terracotta pots help excess moisture evaporate. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting impala lily — frequently asked questions

How often should you repot impala lily?

Every 2–3 years, into bone-dry mix for impala lily. Repot impala lily every 2–3 years into a snug pot of sandy, fast-draining cactus or succulent mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does impala lily need?

When is the best time of year to repot impala lily?

Should you water impala lily after repotting?

No — not straight away. Repot impala lily into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise impala lily after repotting?

Not immediately. Wait about 3 weeks after repotting impala lily. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.