Moraea polystachya

RHS Plant Profile
Cape blue tulip
Bulbs Conservatory Greenhouse

A cormous perennial producing three to five narrow, upright leaves to 80cm long on branching stems. In summer bears light blue to purple, iris-like flowers, the outer petals bearing a white-edged, yellow mark at the base

Position

Full sun

Soil Types

Loam, Sand

Max Height

0.5-1 metres

Max Spread

0-0.1 metre

Size

Time to Maturity
2–5 years
Max Spread
0-0.1 metre
Max Height
0.5-1 metres

Growing Conditions

Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
West–facing or South–facing
Exposure
Sheltered
Hardiness
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Iridaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling Pets: Harmful if eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Moraea are cormous perennials with linear, sword-shaped or rolled leaves and clusters of short-lived iris-like flowers in late spring or summer
Name Status
Correct
Plant Range
Namibia to S Africa

How to Grow

Cultivation

Grow at the base of a warm, sunny wall in a well-drained, humus-rich, moderately fertile soil in full sun. Protect from excessive winter wet. Under glass grow in a peat-free, loam-based compost with added sharp grit. Water sparingly when growth begins and freely in full growth. Dry off as leaves wither, to ensure a dry dormancy from mid-summer to autumn

Propagation

Propagate by seed sown in containers in a coldframe in spring, or separate offsets when dormant

Suggested planting locations and garden types

  • Patio and container plants
  • Mediterranean climate plants
  • Wall side borders

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free