Repotting guide

When & how to repot Hardy Ice Plant (Delosperma cooperi)

Also called Hardy Ice Plant, Cooper's Ice Plant, Purple Ice Plant, Trailing Ice Plant.

More about hardy ice plant

About Hardy Ice Plant

Delosperma cooperi · also called Hardy Ice Plant, Cooper's Ice Plant · flowering

The most cold-hardy of the ice plants, this prostrate South African succulent smothers itself in vivid neon purple-pink daisy-like flowers all summer and into autumn. A fast-spreading mat-former at just 7–10 cm tall, it is excellent for rockeries, wall crevices, and sunny slopes. More frost-tolerant than other Delosperma, surviving to USDA Zone 6 with good drainage.

Mature size: 7–10 cm tall; 30–60 cm wide

How to tell hardy ice plant needs repotting

Repotting on a calendar is less reliable than reading the plant. For hardy ice plant, 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 hardy ice plant

Every 2–3 years, into bone-dry mix. Hardy Ice Plant's growth habit — prostrate, mat-forming evergreen succulent groundcover — sets the pace. The most cold-hardy of the ice plants, this prostrate South African succulent smothers itself in vivid neon purple-pink daisy-like flowers all summer and into autumn. A fast-spreading mat-former at just 7–10 cm tall, it is excellent for rockeries, wall crevices, and sunny slopes. More frost-tolerant than other Delosperma, surviving to USDA Zone 6 with good drainage.

What size pot to step hardy ice plant up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Hardy Ice Plant 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 hardy ice plant

Spring or summer, while hardy ice plant 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 hardy ice plant

Repot dry. Do not water hardy ice plant 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, gravelly, or rocky sharply drained soil 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 hardy ice plant 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 hardy ice plant 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 hardy ice plant

Hardy Ice Plant wants sandy, gravelly, or rocky sharply drained soil. Thrives in sandy, rocky, or shallow soils with exceptional drainage. Missouri Botanical Garden notes it 'will grow poorly or die in any soil that is not well-drained.' A gritty, lean mix (cactus compost with 30–50% coarse grit or perlite) is ideal. Neutral to alkaline pH is tolerated. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting hardy ice plant — frequently asked questions

How often should you repot hardy ice plant?

Every 2–3 years, into bone-dry mix for hardy ice plant. Repot hardy ice plant every 2–3 years into a snug pot of sandy, gravelly, or rocky sharply drained soil, 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 hardy ice plant need?

When is the best time of year to repot hardy ice plant?

Should you water hardy ice plant after repotting?

No — not straight away. Repot hardy ice plant 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 hardy ice plant after repotting?

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