Orange stonecrop

Phedimus kamtschaticus. Family Crassulaceae. Groundcover.

Also called Kamchatka stonecrop, Russian stonecrop, Sedum kamtschaticum.

Orange stonecrop (Phedimus kamtschaticus) is a low-growing, succulent perennial that forms spreading patches of fleshy green leaves. Gardeners grow it for its yellow summer flowers, often followed by orange-red seedheads, and its ability to cover sunny, dry ground with little attention.

Hardiness

USDA zones 3a to 9b

UK hardiness: H7 (very hardy, below -20°C)

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Grows outdoors in the shaded zones. Select a zone to see what else grows there.

Orange stonecrop
Photo: an iNaturalist member
Orange stonecrop
Photo: Tina Ellegaard Poulsen
Orange stonecrop
Photo: Andrew Sebastian

At a glance

Sun
Full sun to light partial shade; flowering and compact growth are best in full sun.
Water
Water regularly while establishing, allowing the soil to dry between waterings. Established plants usually need extra water only during prolonged drought.
Soil
Well-drained sandy, gravelly or rocky soil; tolerates poor soil but dislikes waterlogged ground, especially in winter.
Height
0.3-0.5 ft (0.1-0.15 m)
Spread
1-1.5 ft (0.3-0.45 m), gradually wider where stems root
Flowers
Early to midsummer; clusters of small, star-shaped yellow flowers, followed by orange-red seedheads.
Foliage
Fleshy, spoon-shaped green leaves with teeth mainly toward their tips; foliage may develop bronze or reddish autumn colour. Usually deciduous in cold winters, sometimes partly evergreen in mild climates.
Growth
Moderate
Care needed
Low

The year at a glance

  • Pollinators
  • Drought tolerant
  • Cold hardy
  • Heat tolerant
  • Low allergen
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Flowers
Fruit
Plant

Northern hemisphere months. In Australia, shift them by six.

Difficulty
Easy
Toughness
Very tough

Will it suit your garden?

Pick your zone, country, light and whether you have pets.

Full sun is 6 or more hours of direct sun a day, part shade 3 to 6 hours, shade under 3.

How it grows

  1. Planting day

    0.1 ft (0.03 m)

  2. After 1 year

    0.2 ft (0.07 m)

  3. After 2 years

    0.3 ft (0.11 m)

  4. After 3 years

    0.4 ft (0.13 m)

    full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Good to know

Cats and dogs
Safe
Growth rate
Moderate

Care

Jobs through the year

WaterApr–May, Sep, every 21 days
Water established patches only in prolonged drought; water new plants when soil dries.
WaterJun–Aug, every 14 days
Water only during prolonged drought and only when the root zone is dry.
PruneFeb–Mar
Remove dead stems before new growth emerges.
PruneSep–Oct
Trim stems spreading beyond the intended patch.
DivideMar–May
Lift and divide crowded or thinning patches into healthy rooted sections.
ProtectJan–Feb, Oct–Dec
Clear wet leaves and keep thick organic mulch away from crowns.
  • Water new plants when the root zone dries; reduce watering once they are established.
  • Avoid rich compost and routine feeding, which can encourage loose, floppy growth.
  • Keep the crown clear of wet leaves and thick organic mulch; use a light gravel mulch if needed.
  • Lift and divide crowded or thinning patches in spring.
  • Trim back stems that spread beyond the space you want them to fill.

Pruning. Remove dead stems in late winter or early spring before new growth develops. After flowering, clip off spent flower stems if you prefer a tidier patch, or leave the coloured seedheads in place.

Through the year

Late winter
Remove dead stems and clear wet leaves from around the crowns.
Spring
Plant or divide clumps in freely draining soil; water until new roots establish.
Early summer
Check young plants during dry spells and water deeply only when the soil has dried.
Midsummer
Leave developing orange-red seedheads for colour, or clip off spent flower stems.
Autumn
Trim unwanted spread and remove fallen leaves that could trap moisture over the plants.

In the garden

  • Plant in rock gardens with small alpine plants for a low carpet of foliage and summer flowers.
  • Use along sunny gravel paths with creeping thyme, keeping it away from regular foot traffic.
  • Let it spill over low retaining walls or the edges of raised beds.
  • Grow in shallow containers with other hardy succulents, using a gritty, freely draining mix.

Garden styles it suits: Dry gravel garden, Alpine rock garden, Desert / xeriscape, Low-maintenance, Pollinator garden and Small-space.

Plant it with: Creeping thyme, Houseleeks, Blue fescue, Moss phlox, Candytuft and Maiden pink.

Wildlife: The open flowers provide nectar and pollen for bees and other visiting insects.

Problems to watch for

  • Root or crown rot in wet soil: improve drainage, reduce watering and replant healthy pieces above the surrounding soil level.
  • Slugs and snails eating tender spring growth: remove hiding places, hand-pick pests and use labelled iron-phosphate bait if needed.
  • Vine weevil larvae damaging roots, especially in containers: inspect failing plants and treat with suitable beneficial nematodes according to their temperature requirements.
  • Loose growth and poor flowering in shade or rich soil: move to a sunnier position and stop feeding.

Safety

Not known to be toxic to people, cats, dogs or horses. It is not a culinary plant; eating substantial amounts of the leaves or stems may cause stomach upset.

Easily confused with

  • Two-row stonecrop (Phedimus spurius)

    Usually has opposite pairs of rounded leaves and pink, red or white flowers; orange stonecrop has mostly alternate leaves and yellow flowers.

  • Goldmoss stonecrop (Sedum acre)

    Forms a much finer, tighter mat with tiny, pointed leaves rather than broad, toothed, spoon-shaped leaves.

  • Aizoon stonecrop (Phedimus aizoon)

    Usually grows taller and more upright, with longer, narrower leaves; orange stonecrop stays lower and spreads into patches.

The name

The species name kamtschaticus refers to Kamchatka in the Russian Far East, part of the plant's native range.

Propagation. Divide rooted patches in spring, or take short, non-flowering stem cuttings in late spring or summer. Root cuttings in a gritty mix kept barely moist; stems touching suitable soil may also root naturally.

Checked against open data

Accepted botanical name
Phedimus kamtschaticus
Native range
Amur, China North-Central, Inner Mongolia, Japan, Kamchatka, Khabarovsk, Korea, Kuril Is., Magadan, Manchuria, Primorye and Sakhalin.

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.

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