Repotting guide

When & how to repot Cascade Purple Aubrieta (Aubrieta 'Cascade Purple')

Also called Cascade Purple Aubrieta, Purple Rock Cress.

More about cascade purple aubrieta

About Cascade Purple Aubrieta

Aubrieta 'Cascade Purple' · also called Cascade Purple Aubrieta, Purple Rock Cress · flowering

A vigorous, mat-forming perennial that smothers itself in rich purple flowers each spring. Ideal for walls, rockeries, and slopes, it cascades attractively over edges and thrives in alkaline, sharply drained soil in full sun. Trim back hard after flowering to keep it compact and encourage a possible second flush.

Mature size: 10–15 cm tall, 30–60 cm wide

Watch for — Becoming straggly: Without annual trimming, plants become woody and open. Shear back by half to two-thirds immediately after flowering to maintain a dense, compact mat and promote fresh foliage.

How to tell cascade purple aubrieta needs repotting

Repotting on a calendar is less reliable than reading the plant. For cascade purple aubrieta, 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 cascade purple aubrieta

Every 2–3 years, into bone-dry mix. Cascade Purple Aubrieta's growth habit — prostrate, mat-forming perennial; spreading and cascading — sets the pace. A vigorous, mat-forming perennial that smothers itself in rich purple flowers each spring. Ideal for walls, rockeries, and slopes, it cascades attractively over edges and thrives in alkaline, sharply drained soil in full sun. Trim back hard after flowering to keep it compact and encourage a possible second flush.

What size pot to step cascade purple aubrieta up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Cascade Purple Aubrieta 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 cascade purple aubrieta

Spring or summer, while cascade purple aubrieta 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 cascade purple aubrieta

Repot dry. Do not water cascade purple aubrieta 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 alkaline, sharply drained, gritty or sandy loam 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 cascade purple aubrieta 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 cascade purple aubrieta 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 cascade purple aubrieta

Cascade Purple Aubrieta wants alkaline, sharply drained, gritty or sandy loam. Thrives in poor to moderately fertile, alkaline to neutral soil (pH 7.0–8.0). Amend heavy clay with coarse grit. Excellent drainage is essential — standing moisture, especially in winter, causes root and crown 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 cascade purple aubrieta — frequently asked questions

How often should you repot cascade purple aubrieta?

Every 2–3 years, into bone-dry mix for cascade purple aubrieta. Repot cascade purple aubrieta every 2–3 years into a snug pot of alkaline, sharply drained, gritty or sandy loam, 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 cascade purple aubrieta need?

When is the best time of year to repot cascade purple aubrieta?

Should you water cascade purple aubrieta after repotting?

No — not straight away. Repot cascade purple aubrieta 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 cascade purple aubrieta after repotting?

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