Bove's Jerusalem Sage (Bove's phlomis) care

Light

Bove's Jerusalem Sage needs sun on the leaves, not just bright ambient room light. Requires full sun for vigorous growth and good flowering; in marginal climates plant against a south-facing, sheltered wall to maximise warmth. 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 bove's jerusalem sage low — once every 2–3 weeks during active growth; essentially none from late autumn to early spring. 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. Extremely drought-tolerant once the root system is established; supplementary irrigation should be avoided during the cool, wet season to prevent fatal root rot.

Soil and pot

Bove's Jerusalem Sage grows best in sharply drained, poor to average sandy or rocky soil. Best in mineral, low-fertility soils; amend heavy garden soils with coarse grit or crushed gravel at planting and raise the crown slightly above the surrounding soil level. 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

Bove's Jerusalem Sage sits happiest at around Low (below 50%) humidity and -3 to 38°C (27 to 100°F). Adapted to the semi-arid conditions of North Africa; excessive atmospheric humidity in cool temperatures is a risk factor for crown fungal diseases. 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 bove's jerusalem sage sparingly. No regular feeding is needed or beneficial; a very light application of low-nitrogen fertiliser in spring is the maximum advisable in nutrient-poor soils. 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 bove's jerusalem sage in the Growli community. Each is annotated with the most common cause so you know where to start.

• Winter frost and wet damage — Being of North African origin, this species is less cold-hardy than some European phlomis; protect the crown with a deep grit mulch in zones 9 and below, and bring containerised plants under cover during hard frosts.
• Grey mould (Botrytis cinerea) — The dense woolly foliage can trap moisture and harbour Botrytis in cool, wet conditions; improve air circulation by lightly thinning the interior of the plant and avoid wetting foliage during watering.

Propagation

Semi-ripe cuttings taken in late summer root well in a sand/perlite mix; seed germination is improved by soaking seeds for 24 hours before sowing at 18–20°C in spring. 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

Bove's Jerusalem Sage is mildly toxic to pets. Phlomis bovei is not listed in the ASPCA Toxic and Non-Toxic Plant Database. Due to the lack of published safety data for this species, it is classified as mildly-toxic as a precaution; seek veterinary advice if a pet consumes 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.

Bove's Jerusalem Sage deep-dive guides

Every aspect of bove's jerusalem sage care, each with its own calibrated guide:

• Common bove's jerusalem sage problems & fixes
• Bove's Jerusalem Sage watering schedule
• Bove's Jerusalem Sage light requirements
• Best soil mix for bove's jerusalem sage
• Bove's Jerusalem Sage fertilizing guide
• When to repot bove's jerusalem sage
• How to propagate bove's jerusalem sage
• How to prune bove's jerusalem sage
• What's eating my bove's jerusalem sage?
• Bove's Jerusalem Sage growth rate & size
• Bove's Jerusalem Sage cold hardiness
• Bove's Jerusalem Sage temperature & humidity
• Is bove's jerusalem sage toxic to cats & dogs?
• Is bove's jerusalem sage toxic to cats?
• Is bove's jerusalem sage toxic to dogs?
• All 10 Phlomis varieties
• Getting bove's jerusalem sage to bloom

Featured in these plant shortlists

Bove's Jerusalem Sage qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Bove's Jerusalem Sage is also known as Bove's Jerusalem sage, Bove's phlomis, and Moroccan phlomis.

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