Repotting guide

When & how to repot Plum Pudding Heuchera (Heuchera 'Plum Pudding')

Also called Plum Pudding coral bells, silvered purple heuchera.

More about plum pudding heuchera

About Plum Pudding Heuchera

Heuchera 'Plum Pudding' · also called Plum Pudding coral bells, silvered purple heuchera · flowering

'Plum Pudding' is a popular coral bells with metallic plum-purple maple-shaped leaves overlaid with a silvery sheen and darker veins, holding colour through the season and into mild winters. A reliable evergreen mound, it sends up slender stems of tiny creamy flowers in early summer. A versatile, well-behaved choice for shade borders, edging, and containers.

Mature size: Around 20-25 cm tall in leaf, 40-50 cm wide (8-10 in tall, 16-20 in wide); flower scapes reach about 50-60 cm.

Watch for — Crown heaving: Winter freeze-thaw pushes the woody crown out of the ground, exposing roots. Mulch in autumn and replant or firm heaved crowns in spring.

How to tell plum pudding heuchera needs repotting

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

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for plum pudding heuchera) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 plum pudding heuchera

Only every 2–4 years, when genuinely crowded. Plum Pudding Heuchera is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Compact, evergreen to semi-evergreen clump-forming perennial making a tidy mound of silvered plum leaves; wiry flower stems rise well above the foliage..

What size pot to step plum pudding heuchera up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Plum Pudding Heuchera positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping plum pudding heuchera into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 plum pudding heuchera

Early spring, just as new growth restarts, is the ideal window for plum pudding heuchera. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting plum pudding heuchera

Confirm it actually needs it. Slide plum pudding heuchera out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip plum pudding heuchera out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh fertile, humus-rich, sharply draining loam, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water plum pudding heuchera again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for plum pudding heuchera

Plum Pudding Heuchera wants fertile, humus-rich, sharply draining loam. Neutral to slightly acidic (pH 6.0-7.0) amended with compost and grit. Heavy wet clay is the main cause of failure in this cultivar. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting plum pudding heuchera — frequently asked questions

How often should you repot plum pudding heuchera?

Only every 2–4 years, when genuinely crowded for plum pudding heuchera. Only repot plum pudding heuchera every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using fertile, humus-rich, sharply draining loam. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does plum pudding heuchera need?

When is the best time of year to repot plum pudding heuchera?

Does plum pudding heuchera like to be root-bound?

Yes — plum pudding heuchera genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise plum pudding heuchera after repotting?

Not immediately. Wait about 4 weeks after repotting plum pudding heuchera. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.