Strawberry globe amaranth (haage globe amaranth) care

Light

Strawberry globe amaranth needs sun on the leaves, not just bright ambient room light. Requires full sun — 6–8+ hours of direct sunlight daily. Strong light produces the most intense flower colour. In partial shade, stems elongate and flower colour is diminished. Avoid planting near taller shade-casting plants. 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 strawberry globe amaranth every 7–14 days once established; moderate during establishment. 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. Highly drought-tolerant once roots are established. Water deeply but infrequently. Excess moisture, especially in heavy soils, causes root and crown rot. Allow the top 3–5 cm of soil to dry out between waterings during hot weather.

Soil and pot

Strawberry globe amaranth grows best in well-drained, sandy to loamy, low fertility. Best in sandy loam or loam with excellent drainage. Tolerates poor, infertile soils; rich soils promote foliage over flowers. pH 5.5–7.0. Heavy clay must be amended with grit or raised beds used; standing water is fatal. 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

Strawberry globe amaranth sits happiest at around Low to moderate (30–65% RH) humidity and 18–40°C (64–104°F). Exceptionally heat- and humidity-tolerant; one of the most reliable annuals in hot, humid climates. Maintains flower production where other annuals fail. Adequate spacing ensures airflow in particularly wet summers. If you keep the room above 18–40°C 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 strawberry globe amaranth sparingly. Minimal feeding required. A balanced slow-release fertiliser (e.g., 10-10-10) incorporated at planting provides adequate nutrition for the season. Avoid high-nitrogen feeds. In very poor soils, a single mid-season liquid feed with low-nitrogen formula may extend blooming. 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 strawberry globe amaranth in the Growli community. Each is annotated with the most common cause so you know where to start.

• Failure to thrive in cool or wet summers — Unlike many annuals, G. haageana genuinely needs heat to perform. In cool, cloudy UK summers it may produce few flowers. Maximise warmth by growing against a south-facing wall, using black-plastic mulch to warm the soil, or treating as a greenhouse/conservatory subject in the UK.
• Crown and root rot — Phytophthora and Pythium cause collapse at the crown in poorly drained or overwatered soils. Ensure sharp drainage; raised beds or gritty compost mixes are advisable. Do not overwater during cool spells.
• Whitefly — Greenhouse whitefly (Trialeurodes vaporariorum) may infest plants grown under cover. Yellow sticky traps, Encarsia formosa biological control, or insecticidal soap sprays manage populations. Outdoor plants are less commonly affected.

Propagation

Start seed indoors 6–8 weeks before the last frost date at 22–25°C; soak seeds for 24 hours to soften the seed coat and improve germination (7–14 days). Transplant outdoors only after all frost risk has passed and soil has warmed above 18°C. Space 30–40 cm apart. Can be direct-sown in warm climates. In zones 9–11, overwinters and may be divided or grown as a short-lived perennial. 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

Strawberry globe amaranth is pet-safe. Gomphrena haageana (Amaranthaceae) belongs to the same genus as G. globosa, which ASPCA lists as non-toxic to dogs and cats. No toxic compounds have been documented in G. haageana. Considered safe around pets and children, though G. haageana is not individually listed by ASPCA. 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.

Strawberry globe amaranth deep-dive guides

Every aspect of strawberry globe amaranth care, each with its own calibrated guide:

• Strawberry globe amaranth watering schedule
• Strawberry globe amaranth light requirements
• Best soil mix for strawberry globe amaranth
• Strawberry globe amaranth fertilizing guide
• When to repot strawberry globe amaranth
• How to propagate strawberry globe amaranth
• Strawberry globe amaranth growth rate & size
• Strawberry globe amaranth cold hardiness
• Strawberry globe amaranth temperature & humidity
• Is strawberry globe amaranth toxic to cats & dogs?
• Is strawberry globe amaranth toxic to cats?
• Is strawberry globe amaranth toxic to dogs?
• Getting strawberry globe amaranth to bloom

Featured in these plant shortlists

Strawberry globe amaranth qualifies for 9 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants 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 houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe low-maintenance plants — Non-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
• Best pet-safe flowering plants — Flowering 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 light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• 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 cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants 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

Strawberry globe amaranth is also known as Strawberry globe amaranth, haage globe amaranth, and orange globe amaranth.

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