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Plant care

Lycian Sage Phlomis (Lycian phlomis) care

Phlomis lycia

Also called Lycian sage phlomis, Lycian phlomis.

RHS H4USDA 8-11Mildly toxic to petsIndoor 90–150 cm tall and 75–100 cm wide (approximately 3–5 ft × 2.5–3.5 ft).

Watering rhythm

2-3weeks

Low — every 2–3 weeks in the growing season; minimal to none in winter

Light

Direct sun (at least 4-6 hours)

Soil

Sharply drained, poor to moderately fertile sandy or stony soil

Humidity

Low (below 50%)

Temp

-5 to 38°C

Pet safety

Mildly toxic to pets

Mature size

90–150 cm tall and 75–100 cm wide (approximately 3–5 ft × 2.5–3.5 ft).

Care at a glance

Light

Most houseplants will scorch where lycian sage phlomis thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Full sun is essential; in the UK, a south- or west-facing wall provides the warmth and reflected heat this Turkish native prefers. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for low — every 2–3 weeks in the growing season; minimal to none in winter for lycian sage phlomis, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Drought-tolerant once established; water only during prolonged dry periods in summer and keep completely dry in winter to avoid root rot.

Soil and pot

Lycian Sage Phlomis grows best in sharply drained, poor to moderately fertile sandy or stony soil. Tolerates chalky, thin soils well; incorporate horticultural grit at a ratio of 1:1 with compost when planting in heavier garden soils. 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

Lycian Sage Phlomis sits happiest at around Low (below 50%) humidity and -5 to 38°C (23 to 100°F). Native to dry coastal climates; performs poorly in humid, shaded British conditions unless drainage is excellent and air circulation is good. 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 lycian sage phlomis sparingly. A single light application of low-nitrogen fertiliser in spring is sufficient; this species is adapted to nutrient-poor soils and over-fertilising leads to rank, floppy stems. 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 lycian sage phlomis in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root rot in wet wintersThe species is extremely sensitive to waterlogging during cold, wet winters; ensure sharp drainage and consider growing against a sheltered, sunny wall in regions with high winter rainfall.
  • Frost damage to stemsProlonged hard frosts below -5°C can kill stems to the ground; in colder UK regions (USDA zone 8 margins) protect the crown with a dry mulch of grit or straw in late autumn.

Propagation

Semi-ripe cuttings taken in mid-summer root readily in a 50:50 grit/perlite mix; alternatively sow seed in spring at 15–18°C with gentle bottom heat. 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

Lycian Sage Phlomis is mildly toxic to pets. Phlomis lycia is not listed in the ASPCA Toxic and Non-Toxic Plant Database. In the absence of confirmed safety data, it is classified as mildly-toxic; seek veterinary advice promptly if a pet ingests this 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.

Lycian Sage Phlomis care — frequently asked questions

What is the common name for Phlomis lycia?

Phlomis lycia is most commonly called Lycian Sage Phlomis, but it is also known as Lycian sage phlomis, Lycian phlomis. The names refer to the same species, so care instructions for Lycian Sage Phlomis apply identically to anything sold as Lycian phlomis.

How much light does lycian sage phlomis need?

Lycian Sage Phlomis grows best in direct sun (at least 4-6 hours). Full sun is essential; in the UK, a south- or west-facing wall provides the warmth and reflected heat this Turkish native prefers.

How often should I water lycian sage phlomis?

Water lycian sage phlomis low — every 2–3 weeks in the growing season; minimal to none in winter. Drought-tolerant once established; water only during prolonged dry periods in summer and keep completely dry in winter to avoid root rot. 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 lycian sage phlomis toxic to cats and dogs?

Lycian Sage Phlomis is mildly toxic to pets. Phlomis lycia is not listed in the ASPCA Toxic and Non-Toxic Plant Database. In the absence of confirmed safety data, it is classified as mildly-toxic; seek veterinary advice promptly if a pet ingests this plant.

What USDA hardiness zone does lycian sage phlomis grow in?

Lycian Sage Phlomis is rated for USDA zone 8-11 and RHS hardiness H4. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Lycian Sage Phlomis deep-dive guides

Every aspect of lycian sage phlomis care, each with its own calibrated guide:

Featured in these plant shortlists

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

Related guides

Lycian Sage Phlomis is also commonly called Lycian sage phlomis or Lycian phlomis.