October daphne (Hylotelephium sieboldii)

Photo: Digigalos, CC BY-SA 3.0 · source

Perennial · Crassulaceae

October daphne

Hylotelephium sieboldii

In other languages: Vetkruid (Nederlands) · Orpin de Siebold (Français)

This stonecrop, formerly called Sedum sieboldii, comes from Japan and is a small, fleshy perennial. From a compact clump grow arching stems 15–20 cm long, carrying round, blue-grey leaves edged red to pink, arranged in whorls of three. In September and October round pink flower heads appear at the tips, and the foliage turns reddish in autumn. In winter the top growth dies back and the plant re-emerges from the base in spring. It is ideal for pots, hanging baskets, rock gardens and low walls.

  • Light

    Full sun

    warm and bright

  • Moisture

    Dry

    tolerates drought

  • Legal basis

    Sand or loam

    any pH

  • Hardiness

    Fully hardy

    down to -25 °C

  • Size

    0.15 m

    tall, 0.3 m wide

  • Flowering

    September–October

Key facts
Pruning monthsMarch
Height0.15 m
Native to BelgiumNo, planted
Good for bees, butterflies and birdsYes, for bees
Poisonous to people and petsNot known to be poisonous
FloweringSeptember–October

Identify

October daphne: how do you recognise it?

Habit
Low, trailing clump 10–20 cm tall and 25–30 cm wide, with gracefully arching stems.
Leaves
Round to rounded-oval, 1–2 cm, fleshy and blue-grey with a red to pink edge; in whorls of three along the stem.
Flower
Round heads 5–7 cm across of small, star-shaped pink flowers, in September and October.
Autumn colour
The leaves turn reddish in autumn, then the top growth dies back.
Roots
A compact rootstock with fleshy roots; stems root easily where they touch the ground.

Flowering: September–October · Plants: March–May and September · Pruning: March

In your garden

Why grow it?

  • Blue-grey foliage edged with red decorates the plant from spring to autumn.
  • Flowers in September and October, when little else is in bloom, and attracts bees.
  • Compact and trailing: lovely on a low wall, in a pot or in a hanging basket.
  • Drought tolerant, with fleshy leaves that store water: almost no care.
  • Hardy and easy to propagate from cuttings.

October daphne: where does it grow best?

  • Full sun for the best flowering and the finest leaf colour; in shade it grows leggy and pale.
  • Very well-drained, poor soil: sand or loam, acid to chalky. In a pot, use cactus or rock-garden compost.
  • Dry; it will not tolerate wet feet, especially in winter.
  • Put it at the edge of a low wall, in a rock garden or in a pot so the stems can trail. Allow 25–30 cm per plant.
Light
Sun
Soil type
Sand or loam
Acidity
Not fussy
Moisture
Dry
Size
0.15 m tall, 0.3 m wide
Hardiness
Hardy (to -25 °C)

Goes well with

  • Houseleek: The same thrifty, fleshy rosettes for a rock garden or pot.
  • Showy stonecrop: Taller kinds flower at the same time and give height behind it.
  • Ornamental grasses: Fine grass next to the fleshy leaves gives contrast.
  • Maiden pink: A low, flowering carpet plant for the rock garden.
  • Lavender: Drought tolerant and grey, it loves the same sunny spot.

Maintenance

October daphne: when and how to plant it?

Plant in March–May and September.

  1. Plant between March and May or in September, when the soil is neither frozen nor waterlogged.
  2. Dig a hole the size of the pot and mix in coarse sand or fine grit if the soil is heavy.
  3. Set the plant at the same depth as in its pot and lightly firm the soil.
  4. Leave 25–30 cm between plants; in a pot, plant one or three.
  5. Water a little after planting, then let the soil dry out.
  6. Spread a layer of fine grit around the base instead of compost: it keeps the crown dry.

Care

Water
Little. In the ground rain is enough; in a pot water when the compost is dry and let excess water drain away.
Feeding
None or hardly any. A light dose of organic feed or a little compost once in spring is enough.
Mulching
Use grit or pebbles, not compost or bark: they hold too much moisture around the crown.
Repotting
Repot a potted plant every two or three years in spring into cactus compost, in a pot with a drainage hole.
Spent flowers
Leave the dry flower heads until spring or cut them off; it is a matter of taste.

Tip: Plant it in a pot or on a low wall where the stems can trail over the edge. Make sure the drainage is good: too much water is its biggest enemy.

October daphne: when to prune it?

Pruning months: March.

When: In March, before the new shoots appear.

How:

  • Cut last year’s dry, brown stems right back to the base.
  • Cut out weak or rotting parts back to healthy tissue.
  • In autumn you can remove the spent flower heads if they look untidy.
  • Shorten long stems after flowering to keep the plant compact.

Pruning: when and how · Pruning calendar and basic rules

Propagation

Cuttings
From May to August: take 5–8 cm stem pieces, strip the lower leaves, let them dry for a few hours and insert them in sandy cutting compost. They root in 2–4 weeks.
Division
In March–April: lift the clump, divide it into pieces with roots and replant straight away.

October daphne: how does it get through the winter?

Hardy to −25 °C.

  • Hardy to about −25 °C: the stems die back, but the plant re-emerges by itself in spring.
  • The main danger is wet soil in winter. Plant in very well-drained soil and let the water drain away.
  • In a pot: stand it in a sheltered spot, against a wall and under an overhang if possible, so the compost does not get soaked. Wrap the pot in hessian or bubble wrap against frost.

Diseases and pests

  • Root rot: Stems turn soft and brown at the base. This is usually caused by soil that is too wet: plant higher, mix grit into the soil and water less.
  • Vine weevil: Rounded notches in the leaf edges are the adult beetles; the white grubs gnaw the roots in winter. Pick off the beetles in the evening by torchlight or use biological nematodes.
  • Leggy stems: Too little light gives long, floppy stems. Move the plant to a sunny spot.
  • Slugs: Occasional slug damage in spring. Collect them in the evening.

Through the year

  • March: Cut back dry stems. Divide the clump. Plant.
  • April: Plant. Give a little compost or feed.
  • May: Plant. Take cuttings.
  • June: Growth, a sunny spot is ideal. Take cuttings.
  • July: Take cuttings. In pots, water only when the compost is dry.
  • August: Buds form at the stem tips.
  • September: Flowering begins. Plant.
  • October: Full flower, the leaves turn red. Bees visit the flowers.
  • November: Stems die back. Protect pots from frost.

Use

Good for wildlife

Bees
Nectar and pollen for honeybees and wild bees.

You and this species

Did you know?

  • The species is named after Philipp Franz von Siebold, a German physician and naturalist who introduced many Japanese plants to Europe.
  • The thick leaves are water reservoirs: that is how the plant survives dry spells.
  • Many of the taller stonecrops were moved from the genus Sedum to Hylotelephium, which is why you meet both names.

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