Repotting guide

When & how to repot Dwarf Lewisia (Lewisia pygmaea)

Also called Dwarf Lewisia, Pygmy Lewisia, Alpine Lewisia.

More about dwarf lewisia

About Dwarf Lewisia

Lewisia pygmaea · also called Dwarf Lewisia, Pygmy Lewisia · flowering

A tiny, high-altitude alpine perennial native to rocky scree and tundra from Alaska to New Mexico, bearing small pink to deep rose flowers in early summer. One of the hardiest lewisias, it is fully deciduous and enters a completely dry summer dormancy. Best suited to alpine troughs, scree beds, or an alpine house where its precise needs for summer drought can be met.

Mature size: 3–6 cm tall in flower, rosette 3–5 cm wide

Watch for — Summer dormancy rot: Any moisture during summer dormancy will rot the small taproot. This is the main reason Dwarf Lewisia fails in cultivation outside its native range. Grow in an alpine house or under glass from July to September.

How to tell dwarf lewisia needs repotting

Repotting on a calendar is less reliable than reading the plant. For dwarf lewisia, 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 dwarf lewisia

Every 2–3 years, into bone-dry mix. Dwarf Lewisia's growth habit — miniature, deciduous, rosette-forming perennial with a slender taproot; fully summer-dormant — sets the pace. A tiny, high-altitude alpine perennial native to rocky scree and tundra from Alaska to New Mexico, bearing small pink to deep rose flowers in early summer. One of the hardiest lewisias, it is fully deciduous and enters a completely dry summer dormancy. Best suited to alpine troughs, scree beds, or an alpine house where its precise needs for summer drought can be met.

What size pot to step dwarf lewisia up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Dwarf Lewisia 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 dwarf lewisia

Spring or summer, while dwarf lewisia 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 dwarf lewisia

Repot dry. Do not water dwarf lewisia 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 very sharply drained, gritty alpine scree; poor to humus-light, slightly acidic to neutral 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 dwarf lewisia 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 dwarf lewisia 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 dwarf lewisia

Dwarf Lewisia wants very sharply drained, gritty alpine scree; poor to humus-light, slightly acidic to neutral. Best in a mix of three parts coarse grit to one part loam with a little leaf mould, pH 5.5–7.0. In its native habitat it grows in rocky scree, gravel bars, and gravelly alpine meadows with excellent drainage and low nutrient levels. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting dwarf lewisia — frequently asked questions

How often should you repot dwarf lewisia?

Every 2–3 years, into bone-dry mix for dwarf lewisia. Repot dwarf lewisia every 2–3 years into a snug pot of very sharply drained, gritty alpine scree; poor to humus-light, slightly acidic to neutral, 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 dwarf lewisia need?

When is the best time of year to repot dwarf lewisia?

Should you water dwarf lewisia after repotting?

No — not straight away. Repot dwarf lewisia 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 dwarf lewisia after repotting?

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