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Plant care

Andorra Compact Juniper (Compact Andorra Juniper) care

Juniperus horizontalis 'Plumosa Compacta'

Also called Andorra Compact Juniper, Compact Andorra Juniper.

RHS H7USDA 3-9Mildly toxic to petsIndoor About 30-45 cm tall and 1.2-1.8 m wide at maturity.

Watering rhythm

7-10days

Every 7-10 days in the first season, then sparingly

Light

Direct sun (at least 4-6 hours)

Soil

Well-drained loam or sandy soil

Humidity

30-60%

Temp

-35 to 35°C

Pet safety

Mildly toxic to pets

Mature size

About 30-45 cm tall and 1.2-1.8 m wide at maturity.

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun, at least 6 hours a day, maintains its dense, even shape and strong winter colour. Shade causes loose, thin growth and washed-out tones. If your only bright window faces south, that's perfect for andorra compact juniper — same window any aroid would fry on.

Watering

Watering andorra compact juniper: every 7-10 days in the first season, then sparingly. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water steadily until established. Thereafter it is drought-tolerant and dislikes saturated soil; allow the top of the soil to dry and avoid standing water around the base.

Soil and pot

Andorra Compact Juniper grows best in well-drained loam or sandy soil. Tolerant of poor, dry and rocky soils across a broad pH range (about 5.5-7.5). Sharp drainage is essential; soggy or compacted clay invites root rot. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Andorra Compact Juniper sits happiest at around 30-60% humidity and -35 to 35°C (-31 to 95°F). An outdoor shrub unaffected by humidity. Good air movement keeps the plumed foliage dry and reduces fungal blight in muggy summers. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed andorra compact juniper sparingly. Low-maintenance. One light feed of balanced slow-release granular fertiliser in spring suffices for young plants; mature shrubs in average soil often need none. Avoid over-fertilising, which loosens the compact form. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on andorra compact juniper in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Tip blightPhomopsis and Kabatina brown the shoot tips in wet weather; remove diseased growth and improve airflow.
  • Root rotHeavy, waterlogged soil rots roots; ensure sharp drainage or plant on a slight mound.
  • Loss of compactnessShade or rich feeding produces loose, sprawling growth; keep in full sun and feed sparingly.
  • Spider mitesHot, dry, dusty conditions cause stippling and bronzing; rinse foliage and treat persistent infestations with horticultural oil.

Propagation

Propagate from semi-hardwood cuttings in late summer or autumn with rooting hormone in a gritty, well-drained mix. Layering of low branches also works. Seed will not reproduce the cultivar's compact, plumose habit, so use vegetative methods. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Andorra Compact Juniper is mildly toxic to pets. Juniperus is not individually listed by the ASPCA, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Foliage and berries hold mildly irritant volatile oils that may cause vomiting or diarrhoea if chewed. Low overall risk, but not confirmed non-toxic. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Andorra Compact Juniper care — frequently asked questions

What is the common name for Juniperus horizontalis 'Plumosa Compacta'?

Juniperus horizontalis 'Plumosa Compacta' is most commonly called Andorra Compact Juniper, but it is also known as Andorra Compact Juniper, Compact Andorra Juniper. The names refer to the same species, so care instructions for Andorra Compact Juniper apply identically to anything sold as Compact Andorra Juniper.

How much light does andorra compact juniper need?

Andorra Compact Juniper grows best in direct sun (at least 4-6 hours). Full sun, at least 6 hours a day, maintains its dense, even shape and strong winter colour. Shade causes loose, thin growth and washed-out tones.

How often should I water andorra compact juniper?

Water andorra compact juniper every 7-10 days in the first season, then sparingly. Water steadily until established. Thereafter it is drought-tolerant and dislikes saturated soil; allow the top of the soil to dry and avoid standing water around the base. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is andorra compact juniper toxic to cats and dogs?

Andorra Compact Juniper is mildly toxic to pets. Juniperus is not individually listed by the ASPCA, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Foliage and berries hold mildly irritant volatile oils that may cause vomiting or diarrhoea if chewed. Low overall risk, but not confirmed non-toxic.

What USDA hardiness zone does andorra compact juniper grow in?

Andorra Compact Juniper is rated for USDA zone 3-9 (very hardy) and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Andorra Compact Juniper deep-dive guides

Every aspect of andorra compact juniper care, each with its own calibrated guide:

Featured in these plant shortlists

Andorra Compact Juniper qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Andorra Compact Juniper is also commonly called Andorra Compact Juniper or Compact Andorra Juniper.