How to Grow Pterostylis
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Pterostylis
Pterostylis spp.
flowerPterostylis, commonly known as greenhoods, is a genus of small to medium terrestrial orchids native to Australia, New Zealand, and nearby regions. These orchids are characterized by their distinctive hood-like dorsal sepal and pouch-like labellum, often appearing in shades of green with red or brown striping. They are popular among orchid enthusiasts for their unique morphology and relatively modest growing requirements compared to tropical orchids.
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Example Pterostylis timeline · Pittsburgh, PA (Zone 6b)
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Plant Pterostylis
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Pterostylis blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11b; can be grown indoors or in cool greenhouses in colder regions
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Get my Pterostylis timeline →Growth Stages
Dormancy & Tuber Rest
4-8 weeksPlant is dormant underground as a small tuber, typically during summer months in warmer climates.
Store tubers in a cool, dry location. Ensure substrate remains barely moist. Maintain temperatures between 50-60°F if possible. Do not disturb.
Sprouting & Shoot Emergence
2-4 weeksGreen shoots and leaves begin emerging from the tuber in autumn as temperatures cool and day length shortens.
Resume regular watering. Maintain bright, indirect light. Ensure good air circulation. Begin monthly balanced fertilizer applications at quarter strength.
Vegetative Growth
6-10 weeksPlant develops rosette of lance-shaped green leaves, building energy reserves in the tuber.
Maintain consistent moisture without waterlogging. Fertilize monthly at quarter to half strength. Keep temperatures cool (50-65°F is ideal). Ensure excellent air flow.
Flowering
4-8 weeksDistinctive hooded flowers emerge from leaf axils or center of rosette, typically appearing in winter to early spring. Each flower is uniquely shaped with an arching dorsal sepal forming a hood.
Reduce fertilizer frequency. Maintain cool temperatures (55-70°F). Ensure good air circulation to prevent fungal issues. Keep foliage dry. Flowers may last 2-4 weeks.
Post-Flowering & Senescence
4-6 weeksLeaves gradually yellow and wither as plant enters dormancy. Energy is redirected to tuber development.
Gradually reduce watering as foliage declines. Stop fertilizing. Allow soil to dry out somewhat. Do not remove leaves until completely dead, as they continue photosynthesis.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Inspect regularly; remove by hand or with soft brush; apply horticultural oil or insecticidal soap if severe. Isolate affected plants.
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Remove with cotton swab dipped in rubbing alcohol; spray with insecticidal soap; ensure excellent air circulation and avoid overwatering.
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Increase humidity and air circulation; spray foliage gently with water; apply miticide if infestation is severe. Keep plants separated.
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Improve drainage and air circulation; reduce watering frequency; remove affected tissue; apply fungicide if necessary. Repot in fresh substrate if tuber is affected.
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Remove infected portions immediately; disinfect cutting tools; improve air circulation; reduce humidity; avoid overhead watering.
Uses
Ornamental Orchid Specimen
OrnamentalPterostylis is grown as a prized orchid specimen for its unique hood-shaped flowers and compact growth habit. Ideal for orchid enthusiasts and collectors seeking cool-growing terrestrial orchids distinct from tropical species. [source]
Pollinator Attraction
WildlifeIn native habitats, Pterostylis flowers attract specific native sawfly pollinators through mimicry and elaborate mechanisms. Growing these orchids supports specialized insect populations. [source]
Botanical Collection & Photography
CraftThe distinctive flower structure makes Pterostylis popular for orchid photography, botanical illustration, and specialized orchid collections. Many enthusiasts cultivate multiple species and hybrids. [source]
Indoor Orchid Display
HouseholdWith proper cool-growing conditions and a dormancy period, Pterostylis can be successfully grown indoors near cool windows or in dedicated cool greenhouses, providing year-round botanical interest. [source]
Harvest Tips
Pterostylis orchids are grown for flowers, not harvest. Flowers are best enjoyed in situ for several weeks. If cutting for display, harvest flowers in the morning when tugor is highest, cutting just below the flower base with sterile scissors. Place in cool water away from direct sun; flowers will last 1-2 weeks. Collect seeds after flowers fade if desired for propagation, though seed propagation is difficult and requires orchid propagation expertise.
Fun Facts
- 🌱 Pterostylis flowers employ an elaborate pollination deception strategy, where the labellum (lip) mimics female sawflies, triggering mating behavior in male sawflies that inadvertently pollinate the flower.
- 🌱 The name 'Pterostylis' comes from Greek words meaning 'wing' (ptero-) and 'column' (stylis), referring to the winged appearance of the flower's reproductive column.
- 🌱 Different Pterostylis species flower at different times of year, with some blooming in winter while others flower in spring or autumn, reflecting their native regional climates.
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