Repotting guide

When & how to repot Autumn Catchfly (Silene schafta)

Also called Autumn Catchfly, Schafta Campion.

More about autumn catchfly

About Autumn Catchfly

Silene schafta · also called Autumn Catchfly, Schafta Campion · flowering

Autumn Catchfly is a compact, clump-forming perennial from the Caucasus, prized for producing its vivid magenta-pink flowers from late summer well into autumn when most alpines have finished. It forms low tufts of hairy, mid-green leaves and is excellent for rock gardens, front-of-border positions, and alpine troughs where late-season colour is valuable.

Mature size: 15–20 cm tall, 25–35 cm wide

How to tell autumn catchfly needs repotting

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

Every 2–3 years, into bone-dry mix. Autumn Catchfly's growth habit — clump-forming, semi-evergreen perennial with erect to semi-prostrate branching stems — sets the pace. Autumn Catchfly is a compact, clump-forming perennial from the Caucasus, prized for producing its vivid magenta-pink flowers from late summer well into autumn when most alpines have finished. It forms low tufts of hairy, mid-green leaves and is excellent for rock gardens, front-of-border positions, and alpine troughs where late-season colour is valuable.

What size pot to step autumn catchfly up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Autumn Catchfly 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 autumn catchfly

Spring or summer, while autumn catchfly 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 autumn catchfly

Repot dry. Do not water autumn catchfly 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 well-drained, moderately fertile, gritty 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 autumn catchfly 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 autumn catchfly 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 autumn catchfly

Autumn Catchfly wants well-drained, moderately fertile, gritty loam. Accepts a wider range of soils than many alpines, including ordinary garden soil amended with grit. pH 6.0–7.5. Avoid waterlogged or very heavy clay soils. In containers, use an alpine mix of loam, grit, and leaf mould in equal parts. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting autumn catchfly — frequently asked questions

How often should you repot autumn catchfly?

Every 2–3 years, into bone-dry mix for autumn catchfly. Repot autumn catchfly every 2–3 years into a snug pot of well-drained, moderately fertile, gritty 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 autumn catchfly need?

When is the best time of year to repot autumn catchfly?

Should you water autumn catchfly after repotting?

No — not straight away. Repot autumn catchfly 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 autumn catchfly after repotting?

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