Repotting guide

When & how to repot Rosette Rock Jasmine (Androsace sempervivoides)

Also called Rosette Rock Jasmine, Sempervivum-leaved Rock Jasmine.

More about rosette rock jasmine

About Rosette Rock Jasmine

Androsace sempervivoides · also called Rosette Rock Jasmine, Sempervivum-leaved Rock Jasmine · flowering

A compact Himalayan alpine forming dense cushions of small, tight rosettes studded with pink to mauve umbels in spring. Thrives in sharply drained, gritty scree or rock crevices. Keep roots evenly moist but never waterlogged, and water from below to protect rosettes from rot. Perfect for alpine troughs or raised beds.

Mature size: 5–10 cm tall, spreading to 20–30 cm wide

Watch for — Aphid infestation: Particularly common when grown under glass or in sheltered spots. Check undersides of leaves regularly and treat early with insecticidal soap or neem oil. Open-air growing dramatically reduces aphid pressure.

How to tell rosette rock jasmine needs repotting

Repotting on a calendar is less reliable than reading the plant. For rosette rock jasmine, 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 rosette rock jasmine

Every 2–3 years, into bone-dry mix. Rosette Rock Jasmine's growth habit — mat-forming, cushion-forming perennial with stoloniferous offsets producing compact rosettes at ground level — sets the pace. A compact Himalayan alpine forming dense cushions of small, tight rosettes studded with pink to mauve umbels in spring. Thrives in sharply drained, gritty scree or rock crevices. Keep roots evenly moist but never waterlogged, and water from below to protect rosettes from rot. Perfect for alpine troughs or raised beds.

What size pot to step rosette rock jasmine up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Rosette Rock Jasmine 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 rosette rock jasmine

Spring or summer, while rosette rock jasmine 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 rosette rock jasmine

Repot dry. Do not water rosette rock jasmine 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, gritty alpine mix 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 rosette rock jasmine 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 rosette rock jasmine 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 rosette rock jasmine

Rosette Rock Jasmine wants sharply drained, gritty alpine mix. Use a 50:50 blend of loam and coarse horticultural grit or pea gravel. Soil must be free-draining and lean — fertile, moisture-retentive mixes cause crown rot. In containers, add perlite for extra drainage. A top-dressing of grit around the rosettes helps prevent collar rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting rosette rock jasmine — frequently asked questions

How often should you repot rosette rock jasmine?

Every 2–3 years, into bone-dry mix for rosette rock jasmine. Repot rosette rock jasmine every 2–3 years into a snug pot of sharply drained, gritty alpine mix, 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 rosette rock jasmine need?

When is the best time of year to repot rosette rock jasmine?

Should you water rosette rock jasmine after repotting?

No — not straight away. Repot rosette rock jasmine 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 rosette rock jasmine after repotting?

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