Camassia 'Blue Heaven'

RHS Plant Profile

camas 'Blue Heaven'

RHS

Synonyms

Camassia leichtlinii 'Blue Heavens'

Bulbs

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A bulbous, clump-forming perennial, to 75cm tall, with linear green leaves. Long spikes of pale blue, star-shaped flowers with yellow anthers and green centres appear from spring into early summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or West–facing or East–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): H4

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asparagaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming, Columnar upright
Potentially harmful: Ornamental bulbs - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Ornamental bulbs - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Camassia are bulbous perennials with narrow, channelled leaves and erect racemes of star-shaped violet-blue or creamy-white flowers in early summer
Name Status: Accepted

How to Grow

Cultivation

Grow in moist but well-drained fertile, humus-rich soil, in sun or part shade, providing a winter mulch. Do not allow soil to become waterlogged. Plant bulbs 10cm deep in autumn. May have the potential to become a nuisance due to prolific self-seeding if not managed well This plant was part of the RHS Camassia (quamash) trial 2024-2026 https://www.rhs.org.uk/plants/trials-awards/ongoing-plant-trials/camassia

Propagation

Propagate by seed in containers in a cold frame as soon as ripe or remove offsets when dormant in summer - see bulb propagation

Suggested planting locations and garden types

Prairie planting
Wildflower meadow
Cottage and informal garden
Flower borders and beds

Pruning

Cut back old or damaged growth

Pests

Generally pest-free

Diseases

Generally disease-free