Growli

Plant care

Red Vygie (Royal Dewflower) care

Drosanthemum speciosum

Also called Red Vygie, Royal Dewflower, Scarlet Dewflower.

RHS H2USDA 9b-11Pet-safeIndoor 60–80 cm tall

Watering rhythm

3-4weeks

Every 3–4 weeks established; more frequent in first season

Light

Direct sun (at least 4-6 hours)

Soil

Sandy or loamy, very well-drained soil

Humidity

Low (30–50% RH)

Temp

-3.9 to 35°C

Pet safety

Pet-safe

Mature size

60–80 cm tall

Care at a glance

Light

Red Vygie needs sun on the leaves, not just bright ambient room light. Demands full, unobstructed sun for at least 6 hours daily. Flower buds only open fully in direct sunlight and close by late afternoon. Partial shade results in sparse blooming and leggy growth. Ideal for south- or west-facing outdoor beds; south-facing glazing indoors. 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 red vygie every 3–4 weeks established; more frequent in first season. 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. Deeply drought-tolerant once established. Water moderately in winter (the native rainfall season) and keep relatively dry in summer. Established garden plants typically survive on rainfall alone in mild, Mediterranean-type climates. In containers, water every 3–4 weeks and allow soil to dry fully. Overwatering causes root rot and reduces flowering.

Soil and pot

Red Vygie grows best in sandy or loamy, very well-drained soil. Thrives in poor, lean soils of low fertility — rich or moisture-retentive soils promote soft growth and rot. In containers, use a cactus/succulent compost blended with 40% coarse sand or grit. Tolerates slightly alkaline to neutral pH. Good drainage is the single most critical requirement. 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

Red Vygie sits happiest at around Low (30–50% RH) humidity and -3.9 to 35°C (25 to 95°F). Naturally adapted to low-humidity Mediterranean and semi-arid climates. Tolerates coastal humidity when drainage is excellent. Avoid sheltered, damp corners — good air circulation reduces fungal issues. 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 red vygie sparingly. Feed with a single application of low-nitrogen, high-potassium fertiliser (such as a tomato feed) at the start of the growing season in early spring. Do not feed in summer or autumn — excess nitrogen reduces flower intensity. 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 red vygie in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Woody, non-flowering older plantsPlants become increasingly woody and flower less freely after 3–4 years. Replace with rooted cuttings to maintain vigorous flowering displays; alternatively, cut back hard after flowering to encourage fresh basal shoots.
  • Root rot in wet or clay soilStanding water or poorly drained soil causes rapid root and stem rot. Always plant in sharply draining soil and, in garden settings, raise beds or add coarse grit to improve drainage. Container plants must have drainage holes.
  • AphidsSoft new growth in spring can attract aphid colonies. Dislodge with a strong jet of water or treat with insecticidal soap. Avoid high-nitrogen feeding which produces the lush new growth aphids favour.

Propagation

Stem cuttings root readily: take 8–10 cm tip cuttings in midsummer to autumn after flowering, allow to callous for 2–3 days, then plant in sandy, barely moist compost. Rooting occurs in 3–5 weeks. Seed is also viable — sow on moist river sand in autumn, cover lightly with sand, and germinate at 15–20°C. 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

Red Vygie is pet-safe. Drosanthemum is not individually listed by the ASPCA. The Aizoaceae family, including the ASPCA-confirmed non-toxic Lampranthus (ice plant) and Lithops, has no reported toxic principles for cats, dogs, or horses. 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.

Red Vygie care — frequently asked questions

What is the common name for Drosanthemum speciosum?

Drosanthemum speciosum is most commonly called Red Vygie, but it is also known as Red Vygie, Royal Dewflower, Scarlet Dewflower. The names refer to the same species, so care instructions for Red Vygie apply identically to anything sold as Royal Dewflower.

How much light does red vygie need?

Red Vygie grows best in direct sun (at least 4-6 hours). Demands full, unobstructed sun for at least 6 hours daily. Flower buds only open fully in direct sunlight and close by late afternoon. Partial shade results in sparse blooming and leggy growth. Ideal for south- or west-facing outdoor beds; south-facing glazing indoors.

How often should I water red vygie?

Water red vygie every 3–4 weeks established; more frequent in first season. Deeply drought-tolerant once established. Water moderately in winter (the native rainfall season) and keep relatively dry in summer. Established garden plants typically survive on rainfall alone in mild, Mediterranean-type climates. In containers, water every 3–4 weeks and allow soil to dry fully. Overwatering causes root rot and reduces flowering. 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 red vygie toxic to cats and dogs?

Red Vygie is pet-safe. Drosanthemum is not individually listed by the ASPCA. The Aizoaceae family, including the ASPCA-confirmed non-toxic Lampranthus (ice plant) and Lithops, has no reported toxic principles for cats, dogs, or horses.

What USDA hardiness zone does red vygie grow in?

Red Vygie is rated for USDA zone 9b-11 and RHS hardiness H2. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Red Vygie deep-dive guides

Every aspect of red vygie care, each with its own calibrated guide:

Featured in these plant shortlists

Red Vygie qualifies for 13 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

  • Best pet-safe houseplantsHouseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
  • Best drought-tolerant houseplantsHouseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
  • Best flowering houseplantsIndoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
  • Best pet-safe low-maintenance plantsNon-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
  • Best pet-safe flowering plantsFlowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
  • Best pet-safe plants for bright lightNon-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
  • Best succulents for beginnersThe easiest succulents and cacti to keep alive — selected by documented growth habit, each with the light and watering it actually wants.
  • Best pet-safe succulentsSucculents the ASPCA lists as non-toxic to cats and dogs — low-water greenery that is also safe around a curious pet.
  • Best houseplants for full sunHouseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
  • Best houseplants for a cool roomHouseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
  • Best fast-growing houseplantsHouseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
  • Best cat-safe plantsHouseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
  • Best dog-safe plantsHouseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
  • Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Red Vygie is also known as Red Vygie, Royal Dewflower, and Scarlet Dewflower.