Repotting guide

When & how to repot Bitterroot (Lewisia rediviva)

Also called Bitterroot, Resurrection Plant, Tobacco Root.

More about bitterroot

About Bitterroot

Lewisia rediviva · also called Bitterroot, Resurrection Plant · flowering

The state flower of Montana, Lewisia rediviva is a striking deciduous alpine wildflower bearing large, showy pink to white flowers in late spring on bare ground, long after the narrow, succulent winter leaves have withered. Completely summer-dormant, it requires desert-dry conditions after bloom and is exceptionally cold-hardy but intolerant of summer moisture.

Mature size: 5–8 cm tall in flower, rosette 5–10 cm wide in winter/spring

Watch for — Summer rot: Any moisture reaching the dormant root crown in summer causes rapid rot. In continental climates, the dry summer solves this naturally. In the UK or Pacific Northwest, dry storage or alpine house culture is necessary.

How to tell bitterroot needs repotting

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

Every 2–3 years, into bone-dry mix. Bitterroot's growth habit — deciduous, rosette-forming perennial with a large fleshy taproot; fully summer-dormant — sets the pace. The state flower of Montana, Lewisia rediviva is a striking deciduous alpine wildflower bearing large, showy pink to white flowers in late spring on bare ground, long after the narrow, succulent winter leaves have withered. Completely summer-dormant, it requires desert-dry conditions after bloom and is exceptionally cold-hardy but intolerant of summer moisture.

What size pot to step bitterroot up to

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

Spring or summer, while bitterroot 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 bitterroot

Repot dry. Do not water bitterroot 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 rocky, gravelly, sharply drained, nutrient-poor alkaline to neutral 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 bitterroot 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 bitterroot 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 bitterroot

Bitterroot wants rocky, gravelly, sharply drained, nutrient-poor alkaline to neutral soil. Native to dry, rocky or gravelly open plains and foothills. Requires extremely well-drained, gritty substrate (pH 6.5–8.0). A deep, sandy-gravelly mix mimicking desert scree is ideal. Heavy, moisture-retentive soils are unsuitable. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bitterroot — frequently asked questions

How often should you repot bitterroot?

Every 2–3 years, into bone-dry mix for bitterroot. Repot bitterroot every 2–3 years into a snug pot of rocky, gravelly, sharply drained, nutrient-poor alkaline to neutral 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 bitterroot need?

When is the best time of year to repot bitterroot?

Should you water bitterroot after repotting?

No — not straight away. Repot bitterroot 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 bitterroot after repotting?

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