Growli

Plant care

Blunt Greenhood (Short Greenhood) care

Pterostylis curta

Also called Blunt Greenhood Orchid, Short Greenhood.

RHS H3USDA 8-10Pet-safeIndoor 10-20 cm tall when in flower

Watering rhythm

5-7days

Keep lightly moist during active growth (autumn–spring), roughly every 5-7 days

Light

Medium indirect light (a couple of metres from a window)

Soil

Free-draining sandy loam with added leaf mould

Humidity

50-70%

Temp

5-22°C

Pet safety

Pet-safe

Mature size

10-20 cm tall when in flower

Care at a glance

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Prefers dappled or filtered indirect light, reflecting its native habitat under eucalyptus and tea-tree woodland. Avoid direct sun, particularly in warmer months. A north-facing window (in the southern hemisphere) or a shaded east-facing window indoors provides appropriate conditions. If you can't decide, a free phone lux-meter app aimed at the leaf at noon should read between 800 and 1,500 lux.

Watering

Watering blunt greenhood: keep lightly moist during active growth (autumn–spring), roughly every 5-7 days. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water regularly but not excessively during the growing season (autumn to spring in the southern hemisphere, or autumn to late spring indoors). Reduce to almost no watering during summer dormancy when the tuber rests in the dry soil.

Soil and pot

Blunt Greenhood grows best in free-draining sandy loam with added leaf mould. A gritty, well-draining mix replicating Australian woodland soils is best — coarse sand or fine grit mixed with leaf mould or coco coir. Avoid rich composts or peat-heavy mixes. Shallow pots match the shallow root system. 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

Blunt Greenhood sits happiest at around 50-70% humidity and 5-22°C (41-72°F). Moderate humidity is adequate, reflecting temperate Australian woodland habitats. Avoid extremely dry centrally heated rooms. Cool, fresh air movement is more important than high humidity for this species. If you keep the room above 5 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 blunt greenhood sparingly. Feed sparingly — a very dilute balanced fertiliser at quarter strength once per month during the autumn-to-spring growing season is sufficient. Excess nutrients cause lush but weak growth and may damage the fine roots. 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 blunt greenhood in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Tuber rot in summerWatering during summer dormancy quickly rots the tuber. Keep completely dry from late spring until new growth appears in autumn.
  • Slug and snail damageTender emerging leaves in autumn are very attractive to slugs. Use physical barriers or organic pellets around pots.
  • Fungus gnatsMoist woodland mix can attract fungus gnat larvae. Let the top centimetre dry slightly and use yellow sticky traps.
  • Failure to re-emergeTubers need a warm dry summer to properly rest and regenerate. Store dry and warm (not above 30°C) through summer.
  • AphidsSoft emerging shoots in autumn may attract aphids. Treat with insecticidal soap or a targeted spray.

Companion plants

Blunt Greenhood pairs well with Pterostylis nutans, Caladenia, Thelymitra, and Wurmbea. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Pterostylis curta naturally forms daughter tubers each season. After dormancy in summer, lift the pot and carefully separate the offset tubers from the parent. Replant individually in fresh mix before autumn growth resumes. 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

Blunt Greenhood is pet-safe. Not individually listed by the ASPCA; the Orchidaceae family is broadly considered non-toxic to cats and dogs, and Pterostylis belongs to this family. 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.

Blunt Greenhood care — frequently asked questions

What is the common name for Pterostylis curta?

Pterostylis curta is most commonly called Blunt Greenhood, but it is also known as Blunt Greenhood Orchid, Short Greenhood. The names refer to the same species, so care instructions for Blunt Greenhood apply identically to anything sold as Short Greenhood.

How much light does blunt greenhood need?

Blunt Greenhood grows best in medium indirect light (a couple of metres from a window). Prefers dappled or filtered indirect light, reflecting its native habitat under eucalyptus and tea-tree woodland. Avoid direct sun, particularly in warmer months. A north-facing window (in the southern hemisphere) or a shaded east-facing window indoors provides appropriate conditions.

How often should I water blunt greenhood?

Water blunt greenhood keep lightly moist during active growth (autumn–spring), roughly every 5-7 days. Water regularly but not excessively during the growing season (autumn to spring in the southern hemisphere, or autumn to late spring indoors). Reduce to almost no watering during summer dormancy when the tuber rests in the dry soil. 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 blunt greenhood toxic to cats and dogs?

Blunt Greenhood is pet-safe. Not individually listed by the ASPCA; the Orchidaceae family is broadly considered non-toxic to cats and dogs, and Pterostylis belongs to this family.

What USDA hardiness zone does blunt greenhood grow in?

Blunt Greenhood is rated for USDA zone 8-10 (cool greenhouse in most climates; hardy outdoors in mild maritime regions) and RHS hardiness H3. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Blunt Greenhood deep-dive guides

Every aspect of blunt greenhood care, each with its own calibrated guide:

Featured in these plant shortlists

Blunt Greenhood qualifies for 14 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 low-light houseplantsHouseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
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  • Best pet-safe low-light plantsNon-toxic to cats and dogs AND happy with no direct sun — the two hardest constraints to satisfy at once.
  • Best plants for cold, dark roomsHouseplants that cope with BOTH low light and a cool, unheated room — the hardest indoor spot to fill. Every pick tolerates a low of about 10°C and shade.
  • Best humidity-loving houseplantsHouseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
  • Best bathroom plantsHumidity-loving houseplants that also cope with lower light — suited to the steamy, often-dim conditions of a typical bathroom.
  • Best pet-safe bathroom plantsNon-toxic to cats and dogs and happy in the humid, lower-light conditions of a bathroom — safe greenery for the smallest room.
  • Best small & tabletop houseplantsCompact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
  • 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 pet-safe bedroom plantsNon-toxic to cats and dogs and happy in lower light — calming greenery for a bedroom where a pet often sleeps too.
  • 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.
  • Best small pet-safe plantsCompact, tabletop houseplants that are also ASPCA non-toxic to cats and dogs — safe greenery for a desk or shelf.
  • Browse all 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Blunt Greenhood is also commonly called Blunt Greenhood Orchid or Short Greenhood.