Repotting guide

When & how to repot Hylotelephium 'Autumn Joy' (Hylotelephium 'Autumn Joy')

Also called Autumn Joy sedum, stonecrop.

More about hylotelephium 'autumn joy'

About Hylotelephium 'Autumn Joy'

Hylotelephium 'Autumn Joy' · also called Autumn Joy sedum, stonecrop · flowering

'Autumn Joy' is a clump-forming hardy sedum prized for fleshy grey-green leaves and broad flower heads that open pink in late summer, deepen to coppery-red, then fade to rust over winter. This drought-tolerant, sun-loving perennial is a magnet for bees and butterflies and needs almost no care once established in lean, free-draining soil.

Mature size: 45-60 cm tall and 45-60 cm wide (18-24 in) at flowering.

Watch for — Crown and root rot: Waterlogged or heavy clay soil rots the crown over winter. Improve drainage with grit and never let the plant sit in standing water.

How to tell hylotelephium 'autumn joy' needs repotting

Repotting on a calendar is less reliable than reading the plant. For hylotelephium 'autumn joy', 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 hylotelephium 'autumn joy'

Every 2–3 years, into bone-dry mix. Hylotelephium 'Autumn Joy''s growth habit — upright clump-forming herbaceous perennial; succulent stems rise from a basal crown and are topped by flat, plate-like flower heads. dies back in winter and reshoots from the base each spring. — sets the pace. 'Autumn Joy' is a clump-forming hardy sedum prized for fleshy grey-green leaves and broad flower heads that open pink in late summer, deepen to coppery-red, then fade to rust over winter. This drought-tolerant, sun-loving perennial is a magnet for bees and butterflies and needs almost no care once established in lean, free-draining soil.

What size pot to step hylotelephium 'autumn joy' up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Hylotelephium 'Autumn Joy' 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 hylotelephium 'autumn joy'

Spring or summer, while hylotelephium 'autumn joy' 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 hylotelephium 'autumn joy'

Repot dry. Do not water hylotelephium 'autumn joy' 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 lean, gritty, free-draining loam or sandy 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 hylotelephium 'autumn joy' 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 hylotelephium 'autumn joy' 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 hylotelephium 'autumn joy'

Hylotelephium 'Autumn Joy' wants lean, gritty, free-draining loam or sandy soil. Tolerates poor soils and a near-neutral pH. Avoid rich, moisture-retentive or heavily fed ground, which produces lush floppy growth. Add grit on heavy clay to sharpen drainage. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting hylotelephium 'autumn joy' — frequently asked questions

How often should you repot hylotelephium 'autumn joy'?

Every 2–3 years, into bone-dry mix for hylotelephium 'autumn joy'. Repot hylotelephium 'autumn joy' every 2–3 years into a snug pot of lean, gritty, free-draining loam or sandy 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 hylotelephium 'autumn joy' need?

When is the best time of year to repot hylotelephium 'autumn joy'?

Should you water hylotelephium 'autumn joy' after repotting?

No — not straight away. Repot hylotelephium 'autumn joy' 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 hylotelephium 'autumn joy' after repotting?

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