Not the plant you're looking for? Search over 300,000 plants

Cactus SucculentConservatory GreenhouseAlpine RockeryHouseplants

× Semponium 'Sienna'

A vigorous, rosette-forming evergreen succulent with a central core of green foliage which turns red in the spring, and forms a pyramid shape as the plant matures. The foliage turns an even brighter red when exposed to strong light levels. This variety has the leaves of an aeonium and the shape of a sempervivum

Save to My plants

Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

East–facing or South–facing or West–facing

Exposure

Exposed or Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Crassulaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: A relatively new inter-generic hybrid between Sempervivum and Aeonium, this genus of hardy succulents form rosettes of fleshy leaves in shades of red and green
Name status: Accepted

How to grow

Cultivation

Grow under glass in peat-free, loam-based potting compost with added extra grit. Apply a balanced liquid fertiliser 2 or 3 times a year. Unlike their parent plants, they do not have a period of dormancy

Propagation

Propagate by cuttings of rosettes kept at 18ºC and barely moist until rooted, or by offsets

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Houseplants
Patio and container plants
Rock garden
Conservatory and greenhouse

Pruning

No pruning required but remove any dead foliage

Pests

May be susceptible to aphids and mealybugs under glass

Diseases

Generally disease-free

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.