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Plant care

Orache-Leaved Sun Rose (White-Leaved Sun Rose) care

Halimium atriplicifolium

Also called Orache-Leaved Sun Rose, White-Leaved Sun Rose.

RHS H3USDA 9-10Mildly toxic to petsIndoor 1–1.5 m tall and 1–1.5 m wide (3–5 ft × 3–5 ft)

Watering rhythm

3-4weeks

Very low — once every 3–4 weeks in summer; rely on rainfall in other seasons

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Light

Direct sun (at least 4-6 hours)

Soil

Very well-drained, sandy or rocky, low-fertility, neutral to slightly alkaline

Humidity

Low (20–45% RH)

Temp

-5 to 40 °C

Pet safety

Mildly toxic to pets

Mature size

1–1.5 m tall and 1–1.5 m wide (3–5 ft × 3–5 ft)

Care at a glance

Light

Orache-Leaved Sun Rose needs sun on the leaves, not just bright ambient room light. Must receive full, direct sun throughout the day; this species is particularly intolerant of shade or cool, overcast conditions that promote soft, fungus-prone growth. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water orache-leaved sun rose very low — once every 3–4 weeks in summer; rely on rainfall in other seasons. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water minimally; established plants are drought-tolerant and excess moisture in the root zone — especially in winter — causes rapid root and crown rot. In a typical UK garden, rainfall is sufficient for established plants.

Soil and pot

Orache-Leaved Sun Rose grows best in very well-drained, sandy or rocky, low-fertility, neutral to slightly alkaline. Naturally found on dry, rocky hillsides and sandy coastal scrub; amend heavy soils generously with horticultural grit and position in a raised or sloping bed to ensure water drains away from the crown instantly. 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

Orache-Leaved Sun Rose sits happiest at around Low (20–45% RH) humidity and -5 to 40 °C (23 to 104 °F). Adapted to low-humidity, high-heat Mediterranean conditions; the dense woolly leaf coating helps reduce moisture loss but also traps damp air — good air circulation is vital in humid climates. 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 orache-leaved sun rose sparingly. Do not fertilise; this species has adapted to mineral-poor soils and feeding produces excessively lush, cold-tender growth that increases risk of winter die-back. 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 orache-leaved sun rose in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Frost and cold-wind damage — This is one of the more frost-tender Halimium species; temperatures below -5 °C (23 °F) or cold, drying winds can kill stems back significantly. In marginal climates grow against a warm, sheltered south-facing wall and mulch the root zone before winter.
  • Botrytis (grey mould) in humid conditions — The dense woolly leaf surface can trap moisture in humid weather, creating conditions for Botrytis cinerea. Improve airflow, avoid wetting foliage, and remove any dead or dying stems promptly to reduce infection risk.

Propagation

Take semi-ripe cuttings 6–8 cm long in mid-to-late summer and root in a gritty, free-draining mix with mild bottom heat. Division is not practical; seeds can be sown in spring after scarification, though germination can be slow and uneven. 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

Orache-Leaved Sun Rose is mildly toxic to pets. Halimium atriplicifolium is not listed in the ASPCA Toxic and Non-Toxic Plant database and no specific safety data for cats or dogs has been published. Given the absence of confirmed safety data, it is conservatively rated mildly-toxic; contact a vet if pets are suspected to have ingested any part of the plant. 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.

Orache-Leaved Sun Rose care — frequently asked questions

What is the common name for Halimium atriplicifolium?

Halimium atriplicifolium is most commonly called Orache-Leaved Sun Rose, but it is also known as Orache-Leaved Sun Rose, White-Leaved Sun Rose. The names refer to the same species, so care instructions for Orache-Leaved Sun Rose apply identically to anything sold as White-Leaved Sun Rose.

How much light does orache-leaved sun rose need?

Orache-Leaved Sun Rose grows best in direct sun (at least 4-6 hours). Must receive full, direct sun throughout the day; this species is particularly intolerant of shade or cool, overcast conditions that promote soft, fungus-prone growth.

How often should I water orache-leaved sun rose?

Water orache-leaved sun rose very low — once every 3–4 weeks in summer; rely on rainfall in other seasons. Water minimally; established plants are drought-tolerant and excess moisture in the root zone — especially in winter — causes rapid root and crown rot. In a typical UK garden, rainfall is sufficient for established plants. 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 orache-leaved sun rose toxic to cats and dogs?

Orache-Leaved Sun Rose is mildly toxic to pets. Halimium atriplicifolium is not listed in the ASPCA Toxic and Non-Toxic Plant database and no specific safety data for cats or dogs has been published. Given the absence of confirmed safety data, it is conservatively rated mildly-toxic; contact a vet if pets are suspected to have ingested any part of the plant.

What USDA hardiness zone does orache-leaved sun rose grow in?

Orache-Leaved Sun Rose is rated for USDA zone 9-10 and RHS hardiness H3. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Orache-Leaved Sun Rose deep-dive guides

Every aspect of orache-leaved sun rose care, each with its own calibrated guide:

Featured in these plant shortlists

Orache-Leaved Sun Rose 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

Orache-Leaved Sun Rose is also commonly called Orache-Leaved Sun Rose or White-Leaved Sun Rose.