Repotting guide

When & how to repot Common Iceplant (Mesembryanthemum crystallinum)

Also called Common Iceplant, Crystalline Iceplant, Ice Plant.

More about common iceplant

About Common Iceplant

Mesembryanthemum crystallinum · also called Common Iceplant, Crystalline Iceplant · edible

Common Iceplant is a sprawling annual succulent native to coastal South Africa and the Mediterranean, covered in glistening water vesicles that give it a frosty appearance. The succulent leaves have a crisp, mildly salty-sour flavour and are eaten raw in salads or lightly cooked like spinach. Grow in full sun, sandy soil, and minimal water once established.

Mature size: 10–15 cm tall; spreading 30–60 cm wide

Watch for — Root rot in poorly drained soil: Even brief waterlogging quickly causes basal rot in this succulent annual. Always grow in free-draining media and avoid overhead watering in cool, overcast conditions.

How to tell common iceplant needs repotting

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

Every 2–3 years, into bone-dry mix. Common Iceplant's growth habit — prostrate, mat-forming annual or short-lived perennial succulent — sets the pace. Common Iceplant is a sprawling annual succulent native to coastal South Africa and the Mediterranean, covered in glistening water vesicles that give it a frosty appearance. The succulent leaves have a crisp, mildly salty-sour flavour and are eaten raw in salads or lightly cooked like spinach. Grow in full sun, sandy soil, and minimal water once established.

What size pot to step common iceplant up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Common Iceplant 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 iceplant

Spring or summer, while common iceplant 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 iceplant

Repot dry. Do not water common iceplant 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, low-fertility 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 common iceplant 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 iceplant 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 iceplant

Common Iceplant wants sandy, free-draining, low-fertility soil. Naturally grows in sandy, saline coastal soils. Tolerates a wide range from sandy loam to heavier soils, but excellent drainage is essential. Can perform well in hydroponic systems with a saline nutrient solution, which enhances the characteristic salty flavour. 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 iceplant — frequently asked questions

How often should you repot common iceplant?

Every 2–3 years, into bone-dry mix for common iceplant. Repot common iceplant every 2–3 years into a snug pot of sandy, free-draining, low-fertility 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 common iceplant need?

When is the best time of year to repot common iceplant?

Should you water common iceplant after repotting?

No — not straight away. Repot common iceplant 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 iceplant after repotting?

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