How to Grow Spider Orchid
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Spider Orchid
Brassia longissima
flowerBrassia longissima is an epiphytic orchid native to Central and South America, renowned for its extraordinarily long, thin sepals that can extend 12-15 inches, creating a striking spider-like appearance. The flowers are fragrant, typically yellow-green with dark brown or reddish markings, and bloom in spring to early summer. This orchid is prized by collectors for its dramatic, unusual blooms and relatively manageable care requirements compared to other tropical orchids.
When should you plant Spider Orchid in your zone?
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Example Spider Orchid timeline · Pittsburgh, PA (Zone 6b)
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Plant Spider Orchid
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 Spider Orchid blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Spider Orchid dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10-11; grown indoors in cooler climates
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Get my Spider Orchid timeline →Growth Stages
Establishment
4-6 weeksNew plant adjusting to conditions; visible roots begin emerging from rhizome
Maintain high humidity (50-70%). Water conservatively. Avoid moving plant. Provide bright, indirect light.
Vegetative Growth
6-8 monthsNew shoots and pseudobulbs develop; plant produces 2-4 new leaves per growth cycle
Maintain consistent warmth (70-85°F day, 60-65°F night). Water regularly. Apply orchid fertilizer every 2 weeks at half strength.
Pre-flowering
4-6 weeksPseudobulbs mature; flower spikes begin to emerge from base of new growth
Provide cooler nights (5-10°F drop) to trigger flowering. Reduce watering slightly. Continue fertilizing.
Flowering
6-10 weeksLong, dramatic sepals extend fully; flowers open sequentially along spike; fragrant, spider-like blooms
Provide excellent air circulation. Maintain humidity. Stop fertilizing during blooming. Support spike with stakes if needed.
Post-flowering
Variable, leading back to vegetative stageFlowers fade and drop; plant focuses energy on new growth and pseudobulb development
Resume fertilizing at full strength. Water regularly during growing season. Spike may be cut back.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity to 60-70%. Spray leaves with water. Use neem oil or miticide if severe.
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Isolate plant. Remove with alcohol-soaked cotton swab. Apply insecticidal soap or neem oil weekly.
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Remove manually with brush. Treat with horticultural oil spray.
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Remove affected leaves. Apply pyrethrin-based insecticide. Improve air circulation.
Uses
Ornamental floral display
CulinaryWhile not edible, the dramatic long-lasting flowers are prized for exotic floral arrangements and displays, lasting 2-3 weeks in water. [source]
Floral arrangements and exhibitions
CraftPopular in orchid shows and competitions due to the striking, unusual morphology. Used in high-end floral design for sophisticated arrangements. [source]
Indoor tropical plant cultivation
HouseholdGrown as a houseplant in containers, adding tropical ambiance and fragrance to indoor spaces. Requires humidity and bright light typical of orchid culture. [source]
Pollinator attraction in greenhouse
WildlifeIn its native habitat, attracts specific bee pollinators. In cultivation, provides nectar for beneficial insects in greenhouse or warm conservatory environments. [source]
Traditional ethnobotanical use
MedicinalSome Central American indigenous peoples use related Brassia species in traditional medicine, though modern evidence is limited. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flower spikes with clean, sharp scissors once blooms are fully open for longest vase life (2-3 weeks). Cut just above a node if you want the spike to rebloom. For seed collection (advanced), allow flowers to be pollinated naturally or by hand; seed pods mature in 9-12 months.
Fun Facts
- 🌱 The extraordinarily long sepals of Brassia longissima can extend 12-15 inches, making it one of the longest-petaled orchids relative to plant size.
- 🌱 The spider-like appearance of the flowers is thought to be a form of mimicry that attracts male wasps or bees, which attempt to mate with the flower, inadvertently pollinating it.
- 🌱 Brassia orchids are epiphytic, meaning they naturally grow on tree branches in tropical rainforests rather than in soil, which is why they require specialized orchid bark mixes.
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