Repotting guide

When & how to repot Long-Petalled Lewisia (Lewisia longipetala)

Also called Long-Petalled Lewisia, Truckee Lewisia.

More about long-petalled lewisia

About Long-Petalled Lewisia

Lewisia longipetala · also called Long-Petalled Lewisia, Truckee Lewisia · flowering

Endemic to a small number of high-elevation subalpine sites in the Sierra Nevada of California, mostly near Lake Tahoe, Lewisia longipetala is a rare, deciduous alpine perennial that grows in talus and rocky areas where seasonal snowmelt keeps the soil moist in spring. It produces a basal rosette of thin but fleshy leaves and delicate pale-pink flowers with distinctive resin-tipped petals in late spring to early summer. Bred selections such as 'Little Plum' and 'Little Mango' are the most reliable forms for garden use. The critical care requirement is excellent crown drainage to prevent rot, combined with a cool, semi-shaded position that mimics its high-altitude origin. Lewisia is not listed by the ASPCA; classified as mildly-toxic as a precaution.

Mature size: 8–12 cm tall in flower, 8–15 cm wide

Watch for — Crown and taproot rot: Summer rain or over-irrigation reaching the dormant crown is virtually always fatal. This species is more demanding than L. cotyledon; in wet-summer climates it should be grown exclusively in an alpine house where moisture can be strictly controlled.

How to tell long-petalled lewisia needs repotting

Repotting on a calendar is less reliable than reading the plant. For long-petalled 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 long-petalled lewisia

Every 2–3 years, into bone-dry mix. Long-Petalled Lewisia's growth habit — deciduous, compact rosette-forming perennial growing from a slender taproot; summer-dormant, re-emerging in autumn. — sets the pace. Endemic to a small number of high-elevation subalpine sites in the Sierra Nevada of California, mostly near Lake Tahoe, Lewisia longipetala is a rare, deciduous alpine perennial that grows in talus and rocky areas where seasonal snowmelt keeps the soil moist in spring. It produces a basal rosette of thin but fleshy leaves and delicate pale-pink flowers with distinctive resin-tipped petals in late spring to early summer. Bred selections such as 'Little Plum' and 'Little Mango' are the most reliable forms for garden use. The critical care requirement is excellent crown drainage to prevent rot, combined with a cool, semi-shaded position that mimics its high-altitude origin. Lewisia is not listed by the ASPCA; classified as mildly-toxic as a precaution.

What size pot to step long-petalled lewisia up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Long-Petalled 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 long-petalled lewisia

Spring or summer, while long-petalled 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 long-petalled lewisia

Repot dry. Do not water long-petalled 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 sharply drained, lean, slightly acidic to neutral sandy grit (ph 6.5–7.5) 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 long-petalled 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 long-petalled 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 long-petalled lewisia

Long-Petalled Lewisia wants sharply drained, lean, slightly acidic to neutral sandy grit (ph 6.5–7.5). Plant in a very gritty alpine mix (sharp sand and perlite 1:1:1 with loam) and raise the crown well above surrounding soil. Work fine gravel tightly around the collar. Avoid any organic-rich compost that retains summer moisture around the taproot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting long-petalled lewisia — frequently asked questions

How often should you repot long-petalled lewisia?

Every 2–3 years, into bone-dry mix for long-petalled lewisia. Repot long-petalled lewisia every 2–3 years into a snug pot of sharply drained, lean, slightly acidic to neutral sandy grit (ph 6.5–7.5), 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 long-petalled lewisia need?

When is the best time of year to repot long-petalled lewisia?

Should you water long-petalled lewisia after repotting?

No — not straight away. Repot long-petalled 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 long-petalled lewisia after repotting?

Not immediately. Wait about 3 weeks after repotting long-petalled 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.