Ornamental · Orchidaceae
Ground Orchid
Bletilla striata
A friendly, forgiving orchid that grows right in the garden soil and lifts fresh pink blooms every spring.
Partial shade
Every 3–7 days
USDA 5–9
12–24 in · 30–60 cm
Overview
If you have ever felt sure that orchids were beyond you, the ground orchid is here to prove you wrong. It grows in ordinary garden soil from small underground corms, returns on its own each year, and asks almost nothing of you. Come spring it unfurls pleated, nearly bamboo-like leaves and then a slender stem of magenta-pink flowers that look every bit as exotic as their tropical relatives, without any of the worry.
This orchid is far sturdier than its delicate looks let on, so you can plant it with confidence. It is hardy to roughly USDA zone 5, settling down to the ground each fall and rising again once the soil warms. Give it humus-rich, well-drained soil and a place in dappled shade or gentle morning sun, and a single clump quietly widens into a generous patch over a few seasons.
Once it has found its feet, the kindest thing you can do is leave it be. Keep it watered through the growing season, let it rest dry and dormant over winter, and split the clump every few years, and any missteps along the way are easy to put right.
Care
The short version: give it rich, well-drained soil in partial shade, keep it moist through spring and summer, and let the corms rest dry over winter. Divide the clump every few years and it will thank you with pink blooms each spring, even if you are just starting out.
Light
Ground orchids are happiest in partial shade, the sort of dappled light or soft morning sun you would find at the edge of a woodland. They will gladly take more sun, even full sun, as long as you keep the soil moist for them. The only place they struggle to flower is deep, heavy shade.
Water
Keep the soil evenly moist through spring and summer while the plant is growing, checking it every 3 to 7 days so it never dries out. Once the leaves yellow and fall back, ease right off and let the resting corms pass winter on the dry side. Soggy winter soil is the quickest way to lose them, so this is the one thing worth watching.
Soil
Plant it into humus-rich, well-drained loam with plenty of organic matter mixed in. Any pH from 5.5 to 7.0 suits it just fine, so most garden soil is already close. Good, sharp drainage is the part that truly matters, above all as the cold months come on.
Temperature
This is a wonderfully cold-hardy orchid, at ease across a broad span from about -13°F to 86°F (-25°C to 30°C). The top growth dies down with the first hard frosts, and then the corms wait out winter underground and rise again in spring.
Humidity
Average humidity, somewhere around 40% to 60%, is all it wants, and the outdoor air usually supplies that on its own. There is no misting or fussing for you to do here, so you can put your mind at ease.
Feeding
Feed it monthly through spring and summer while it is in active growth, using a balanced general-purpose fertilizer. Stop once the leaves begin to fade in fall, since a resting plant simply has no use for it.
Pruning
There is barely any pruning to keep up with. Snip away the spent flower stalks once the blooms have faded, then cut the dead foliage back in late fall after it yellows, and that really is the whole of it.
Repotting
A clump can sit contentedly for 3 to 4 years before it wants your help. When the pseudobulbs start crowding above the soil, the flowering tails off, or the middle of the clump turns bare, that is your cue to lift and divide. Better still, that same reset is your chance to make more plants for free.
Size & spacing
Plants reach 12 to 24 inches (30 to 60 cm) tall and spread 12 to 18 inches (30 to 45 cm) wide. Set your divisions about that far apart so each clump has plenty of room to fill in without crowding its neighbors.
When to plant
Plant your ground orchids out in early spring, right as the soil begins to warm and the corms stir from dormancy, and there is no need to rush it. The flowers arrive in late spring, usually somewhere across May and June, and the foliage stays with you through summer before easing back for winter.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: early spring
- Harvest: late spring (May to June)
Hardiness
USDA hardiness zones: 5–9
Temperature: down to -29°C
Troubleshooting
Ground orchids give you very little trouble, and the few things that do crop up are gentle to read and fix. Most come back to wet winter soil, a stray slug, or a clump that has simply grown too crowded. Find what matches below and act early, while it is still an easy fix and nothing to fret over.
Shoots that never come up in spring or turn soft at the base
Try not to panic if this happens: it is pseudobulb rot, and it comes down to soil that stayed too wet around the resting corms all winter. In the coldest zones, bare corms with no mulch can also take frost damage. Gently lift one and feel it, since firm pale flesh means all is well and soft brown mush does not. Replant the good ones in soil that drains fast, tuck a mulch over the bed before the next cold snap, and the clump can bounce right back.
Fix:
- Lift and discard rotted corms, replant healthy firm pseudobulbs in fast-draining amended soil
- Improve drainage by incorporating grit or planting in a raised bed
Plenty of leaves but hardly any flowers
When the foliage looks lovely and the blooms just will not come, the clump is usually overcrowded or sitting in too much shade, so this one is very fixable. Dig down a little and you may find the pseudobulbs jammed tight against each other. Splitting the clump in early spring gives it fresh room to wake up, and shifting it to a spot with morning sun or dappled light brings the flowers back.
Fix:
- Divide congested clumps in early spring to reinvigorate flowering
- Relocate to a site with morning sun or dappled light
Ragged holes nibbled into the leaves and blooms
Ragged holes almost always mean slugs and snails, which love the soft new shoots as they push up in spring. Head out at dusk or right after a rain and you will spot them, plus the shiny slime trails they leave behind. Pick them off by hand, and it helps to circle the fresh shoots with a barrier or a little bait. It is a small nuisance, not a threat to the plant.
Fix:
- Hand-pick slugs and snails in the evening
- Use barriers or appropriate slug controls around emerging shoots
Toxicity
Here is some reassurance for homes with pets and little ones: the ground orchid is non-toxic and safe to have around. Orchids as a family carry nothing harmful, and there is no poison in the leaves, the flowers, or the corms. The worst a nibble might bring is a mild, passing tummy upset, the same as with almost any plant.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
You can relax about cats. If a curious one chews a leaf, the most you might see is a bit of drool or a queasy tummy, which is true of nearly any houseplant, and nothing in this orchid is poisonous.
Dogs None
Dogs are safe here too. There is no toxin to worry over, though a dog that gulps a big mouthful of leaves might feel briefly off just from the roughage.
Horses Safe
Horses have nothing to fear. The plant holds nothing harmful, so a grazing nibble will pass without any trouble.
Rabbits Safe
Rabbits are in the clear. Neither the leaves nor the corms carry a toxin, so a stray bite is completely harmless.
Livestock Safe
Cattle, goats, and sheep are all fine. Nothing in the foliage poses any poisoning risk to grazing animals.
Birds Safe
Birds face no danger. A pet or backyard bird can share a room with this orchid with nothing to worry about.
People Safe
It is harmless to people, little ones included. You would not grow it to eat, but a curious taste will not hurt anyone.
No special handling precautions are needed, though as with any plant, ingestion of large amounts may cause mild stomach upset.
Varieties
Beyond the everyday pink form, a handful of named selections are lovely to track down for their color or extra vigor. These are the ones you are most likely to come across, and each is just as easygoing.
'Alba'
This one swaps the familiar magenta-pink for soft, pure white flowers.
var. albostriata
Creamy white edges and stripes run through its leaves, so it looks charming even when the flowers have finished.
'Big Bob'
A strong grower that reaches taller and stockier and rewards you with noticeably larger flowers.
How to propagate
Making more ground orchids is genuinely simple, and you will not need seed or any special knack. A settled clump hands you brand-new plants every spring, either by splitting it apart or by lifting off its offset corms.
DivisionEasy
Early spring before or as new growth emerges · One growing season
Division is the friendly, reliable way to make more, and early spring is your window, right as the new shoots begin to break ground. Lift the whole clump and gently ease it apart so every piece keeps at least one healthy pseudobulb with a live growth eye, then settle them back into the ground without delay. Give each division one growing season and it will take hold beautifully.
Bulbs & cormsEasy
Early spring · One growing season
You can also grow your patch by using the offset corms, which is just as forgiving. In early spring, gently snap the offset pseudobulbs away from the parent clump and set them back at the depth they sat before. Over a single growing season they settle in and become new clumps of their own.
Myths
Every orchid is a fussy tropical that has to live indoors.
It is true that many orchids are tender, but this one is a hardy terrestrial kind you grow right out in the garden. It comes through winters down to about USDA zone 5, dying back to the ground in fall and rising fresh again in spring, so you really can trust it outside.
Orchids are parasites that steal from trees and harm them.
A ground orchid like this settles its roots into the soil and makes all its own food through its leaves. It takes nothing at all from other plants, growing instead from pseudobulb-like corms tucked just below the surface.