Repotting guide

When & how to repot Siskiyou Lewisia (Lewisia cotyledon)

Also called Siskiyou Lewisia, Cliff Maids, Broadleaf Lewisia.

More about siskiyou lewisia

About Siskiyou Lewisia

Lewisia cotyledon · also called Siskiyou Lewisia, Cliff Maids · flowering

Native to rocky cliffs and outcrops in the Siskiyou and Klamath mountains of northern California and southern Oregon, Lewisia cotyledon is an evergreen rosette perennial prized for its spectacular sprays of funnel-shaped flowers in shades from white and pale pink through to vivid orange, yellow, and magenta. It demands sharply drained, humus-rich, acidic to neutral gritty soil and resents winter wet around its crown above all else; planting on its side in a wall crevice or in a raised alpine trough dramatically improves survival. It holds the RHS Award of Garden Merit. Lewisia is not documented by the ASPCA as toxic; it is considered mildly-toxic as a precaution since definitive non-toxic listing is absent.

Mature size: 10–30 cm tall in flower, 20–40 cm wide

How to tell siskiyou lewisia needs repotting

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

Every 2–3 years, into bone-dry mix. Siskiyou Lewisia's growth habit — evergreen, rosette-forming perennial with thick, spoon-shaped fleshy leaves radiating from a central caudex. — sets the pace. Native to rocky cliffs and outcrops in the Siskiyou and Klamath mountains of northern California and southern Oregon, Lewisia cotyledon is an evergreen rosette perennial prized for its spectacular sprays of funnel-shaped flowers in shades from white and pale pink through to vivid orange, yellow, and magenta. It demands sharply drained, humus-rich, acidic to neutral gritty soil and resents winter wet around its crown above all else; planting on its side in a wall crevice or in a raised alpine trough dramatically improves survival. It holds the RHS Award of Garden Merit. Lewisia is not documented by the ASPCA as toxic; it is considered mildly-toxic as a precaution since definitive non-toxic listing is absent.

What size pot to step siskiyou lewisia up to

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

Spring or summer, while siskiyou 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 siskiyou lewisia

Repot dry. Do not water siskiyou 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 well-drained, humus-rich, gritty, acidic to neutral (ph 5.5–7.0) 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 siskiyou 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 siskiyou 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 siskiyou lewisia

Siskiyou Lewisia wants very well-drained, humus-rich, gritty, acidic to neutral (ph 5.5–7.0). Use a 50:50 mix of loam-based compost and horticultural grit, or a proprietary alpine mix. Avoid lime-rich soils. A coarse-grit or gravel collar around the crown and planting at a slight angle (as in a wall crevice) keeps moisture away from the vulnerable collar. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting siskiyou lewisia — frequently asked questions

How often should you repot siskiyou lewisia?

Every 2–3 years, into bone-dry mix for siskiyou lewisia. Repot siskiyou lewisia every 2–3 years into a snug pot of very well-drained, humus-rich, gritty, acidic to neutral (ph 5.5–7.0), 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 siskiyou lewisia need?

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

Should you water siskiyou lewisia after repotting?

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

Not immediately. Wait about 3 weeks after repotting siskiyou 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.