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Halimium calycinum

Calyx-Like Rock Rose

Low Maintenance Hardiness H3

Bright yellow saucer-shaped flowers cover the low grey-green foliage of Halimium calycinum in late spring and summer. This Mediterranean evergreen shrub suits sunny gravel gardens, coastal planting and raised beds but requires sharp drainage and protection from severe frost and winter saturation.

SKU: HALI-4-Y

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Plant Details

Size

Max Height
0.1 m — 0.5 m
Max Spread
0.1 m — 0.5 m
Growth Habit
Densely branched plant with compact, leafy, rounded overall shape., Widely extends outward with many lateral branches from center.

Planting Position

Sunlight Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.
Full Sun
Aspect Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.
South West
Exposure Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.
Sheltered
Hardiness Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.
Hardiness H3 (−5 to +1 °C) Half-hardy

Ideal Soil Conditions

Soil Type Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.
Chalk Clay Loam Sand
Soil Moisture Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.
Free draining
Soil pH Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.
Acid Alkaline Neutral

Plant Uses & Merits

Uses
  • Patios / Courtyards
  • Coastal Areas
  • Flower Borders
Merits
  • Drought Resistant
  • Generally disease-free
  • Generally pest-free
  • Low Maintenance

Halimium calycinum Description

Halimium calycinum is a low, spreading evergreen shrub related to cistus, with narrow aromatic grey-green leaves and numerous clear yellow flowers. Each bloom lasts briefly, but fresh buds continue opening over several weeks from late spring into summer. Mature plants generally reach around 40 to 60cm high and can spread 1 metre or more, making them useful for banks, gravel borders and positions where growth can soften a wall or raised bed. Grow in full sun in poor to moderately fertile soil with excellent drainage. It tolerates drought, wind and coastal air once established but may be damaged by severe frost or prolonged wet ground. In Ireland, a warm sheltered site is advisable. Prune lightly after flowering without cutting deeply into old bare wood.