Repotting guide

When & how to repot Common Ice Plant (Mesembryanthemum crystallinum)

Also called Common ice plant, Crystalline ice plant, Iceplant.

More about common ice plant

About Common Ice Plant

Mesembryanthemum crystallinum · also called Common ice plant, Crystalline ice plant · edible

Mesembryanthemum crystallinum is an annual or biennial native to the Mediterranean, Middle East, and southern Africa, naturalised along coastal areas worldwide. Its leaves and stems are covered with large glistening vesicles that resemble ice crystals and have a pleasantly salty, succulent taste, making the plant a valued edible green in coastal cuisines. It demands full sun, very free-draining soil, and tolerates salt, drought, and coastal spray, but will rot quickly in waterlogged conditions. The ASPCA does not list it as toxic to cats or dogs; it is considered non-toxic, though very high consumption of the foliage could cause mild digestive upset due to oxalate content.

Mature size: 10–20 cm tall, spreading 30–60 cm wide.

Watch for — Root rot in wet or heavy soils: Plants collapse suddenly when roots sit in waterlogged conditions; grow in raised beds or containers with ample drainage holes and avoid heavy clay soils entirely.

How to tell common ice plant needs repotting

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

Every 2–3 years, into bone-dry mix. Common Ice Plant's growth habit — low-growing, spreading annual or biennial with trailing, branching stems; the succulent glistening foliage is the primary ornamental and edible feature. — sets the pace. Mesembryanthemum crystallinum is an annual or biennial native to the Mediterranean, Middle East, and southern Africa, naturalised along coastal areas worldwide. Its leaves and stems are covered with large glistening vesicles that resemble ice crystals and have a pleasantly salty, succulent taste, making the plant a valued edible green in coastal cuisines. It demands full sun, very free-draining soil, and tolerates salt, drought, and coastal spray, but will rot quickly in waterlogged conditions. The ASPCA does not list it as toxic to cats or dogs; it is considered non-toxic, though very high consumption of the foliage could cause mild digestive upset due to oxalate content.

What size pot to step common 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. Common 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 common ice plant

Spring or summer, while common 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 common ice plant

Repot dry. Do not water common 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, free-draining, tolerates saline and poor soils 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 common 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 common 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 common ice plant

Common Ice Plant wants sandy, free-draining, tolerates saline and poor soils. Grows naturally on coastal dunes and waste ground in lean, sandy, often salty soils; heavy clay or enriched potting compost is unsuitable and leads to collapse. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting common ice plant — frequently asked questions

How often should you repot common ice plant?

Every 2–3 years, into bone-dry mix for common ice plant. Repot common ice plant every 2–3 years into a snug pot of sandy, free-draining, tolerates saline and poor soils, 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 common ice plant need?

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

Should you water common ice plant after repotting?

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

Not immediately. Wait about 3 weeks after repotting common 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.