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Repotting guide

When & how to repot Sedum (Sedum)

Also called stonecrop, burro’s tail, jelly bean plant.

About Sedum

Sedum · also called stonecrop, burro’s tail · houseplant

Sedum is a large genus of succulents ranging from trailing burro’s tail to upright autumn-flowering border plants. Indoor types want bright light and infrequent watering. Hardy garden types like Sedum spectabile thrive outdoors in temperate climates. Pet-safe by ASPCA standards.

Sedum (stonecrop) are succulents found on rocky outcrops, walls, bluff ledges and lean dry soils across the Northern Hemisphere; the genus gave its name to Crassulacean Acid Metabolism (CAM), the night-time CO2 fixation that lets them survive on minimal water.

RHS advises moderately fertile, well-drained, neutral to alkaline soil in full sun; the genus naturally colonises lean, gritty, fast-draining substrates and dislikes rich, wet ground.

Mature size: 10-60 cm tall depending on species

Watch for — Stretched stems: Insufficient light; trim back and root the cuttings in fresh mix.

Sources: rhs.org.uk, missouribotanicalgarden.org

How to tell sedum needs repotting

Repotting on a calendar is less reliable than reading the plant. For sedum, watch for these signs:

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 sedum

Every 2–3 years, into bone-dry mix. Sedum's growth habit — trailing, mound-forming, or upright depending on species — sets the pace. Sedum is a large genus of succulents ranging from trailing burro’s tail to upright autumn-flowering border plants. Indoor types want bright light and infrequent watering. Hardy garden types like Sedum spectabile thrive outdoors in temperate climates. Pet-safe by ASPCA standards.

What size pot to step sedum up to

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

Spring or summer, while sedum 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 sedum

  1. Repot dry. Do not water sedum for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
  2. Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty gritty, free-draining mix ready.
  3. 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.
  4. Pot into dry mix. Set sedum at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
  5. 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 sedum 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 sedum

Sedum wants gritty, free-draining mix. Cactus mix indoors; any well-drained garden soil outdoors. Wet feet are the fastest way to kill a sedum. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting sedum — frequently asked questions

How often should you repot sedum?

Every 2–3 years, into bone-dry mix for sedum. Repot sedum every 2–3 years into a snug pot of gritty, free-draining 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 sedum need?

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Sedum 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. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot sedum?

Spring or summer, while sedum 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.

Should you water sedum after repotting?

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

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

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