Juniperus glauca
Juniperus glauca · Cupressaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around juniperus glauca and prepare for winter.
ID card
- Foliage
- Evergreen, glaucous blue-gray scales
- Flowering
- Insignificant (discreet flowers, blue-black cones)
- Mature size
- 1.5 m in height, compact and spreading habit
- Growth
- Slow to moderate
- Hardiness
- Very hardy (-20°C and beyond)
- Origin
- Arid regions of Central Asia and the Caucasus
- Soil type
- Well-drained, calcareous accepted, poor tolerated
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Juniperus glauca is very tolerant: the only real requirement is impeccable drainage and full sun for that grey-blue color. In heavy soil, create a mound or bank.
The common mistake
Regularly watering an established juniper: it grows slower, yellows, and can decline.
The pro's trick
Plant it young (small pot) rather than large: it roots faster and needs less maintenance.
Care
Watering
The glaucous juniper is very drought-tolerant once established. Water regularly during the first year to encourage rooting, then gradually reduce watering. In temperate climates, natural rainfall is usually sufficient. Avoid excess moisture, which promotes rot.
Exposure
Plant the juniper in full sun to obtain the best glaucous coloration of its foliage. It tolerates windy and exposed situations. Light partial shade is possible but reduces the intensity of the characteristic blue hue.
Soil and drainage
This conifer prefers well-drained soil, even poor or calcareous. Avoid heavy, compact or permanently damp soils. Adding gravel or sand at planting improves drainage and mimics its natural arid habitat.
Pruning
The glaucous juniper requires only light and occasional pruning to maintain its shape. Remove dead or diseased branches in early spring. Avoid severe pruning, which heals with difficulty; respect its natural compact habit.
Fertilizing
No fertilizer is necessary: this conifer thrives on poor and rocky soils. A light application in early spring of the first year accelerates establishment, but avoid excess fertilizer to prevent excessive growth or less attractive foliage.
Diseases and pests
The glaucous juniper is very resistant. The main risks remain root rot in case of excess moisture and certain fungi (juniper rust). Promote air circulation and maintain good drainage to prevent these problems.
Did you know?
The juniper has a long medicinal and aromatic history: its berries have been used for gin distillation since the Middle Ages. Certain varieties, including the glaucous, have adorned rock gardens since the Victorian era for their remarkable blue-gray color and extreme hardiness.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
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- Coast redwoodSequoia sempervirens
Tips generated and checked by Viridia — adapt them to your local climate.