Ornamental · Onagraceae
Gaura
Gaura lindheimeri
Give it full sun and lean, well-drained soil, and gaura floats clouds of butterfly-like blooms across a border from spring to frost.
Full sun
Every 7–14 days
USDA 5–9
3–5 ft · 0.9–1.5 m
Overview
Gaura brings a light, airy softness to a sunny border, the kind of movement that keeps a planting from feeling static. Set at the front or middle of a bed, its slender wands seem to hover just above the greenery and catch the smallest breeze. In a relaxed cottage scheme or a looser modern planting, it reads as effortless.
Part of its appeal is how gracefully it fits into a low-maintenance routine. A deep taproot means it asks for little through the heat of summer, so it suits a garden meant to be enjoyed rather than fussed over. It settles most comfortably in an open, sunny spot with room to sway and a few steadier companions to frame it.
Across zones 5 to 9, it carries a border from late spring or summer clear through to the first fall frost, a long season that few plants match. It also draws pollinators into the scene, adding quiet life to a patio edge or a path you pass each day.
Care
The short version: a sunny spot, lean and sharply drained soil, and only the occasional deep drink. Keep the feeding light, deadhead to hold the display, and cut floppy stems back for a fresh flush.
Light
Gaura wants full sun to flower generously and hold its poised, upright shape. It accepts a little partial shade, but in too much shade the stems stretch, lean, and give far fewer flowers, and the look suffers.
Water
Once it has settled, the deep taproot carries gaura through drought and heat, which is what makes it such an easygoing border plant. Water moderately, letting the top half of the soil dry between drinks, and avoid soggy ground, which brings on root rot. A deep soak every 7 to 14 days suits it far better than frequent watering.
Soil
Give it sandy or loamy, sharply drained soil, since good drainage is the one thing gaura cannot go without. A slightly acidic pH of 5.5 to 6.5 keeps it content. Skip the rich, heavily amended beds, which push leafy growth at the expense of the flowers you planted it for.
Humidity
Ordinary outdoor humidity is all it needs, so there is no figure to worry about. Airflow matters far more here, because crowded, still foliage is what lets powdery mildew and rust dull the planting.
Feeding
Gaura flowers best on a lean diet, so feed only lightly through the growing season, if at all. Rich or heavily fertilized soil reduces flowering and encourages the floppy stems that spoil its lines.
Pruning
Deadhead spent blooms to keep the display going, and cut back floppy or leggy stems to bring on a tidier rebloom. Shear the flower spikes in fall, then clear the dead foliage away in spring for a clean start.
Size & spacing
Gaura reaches 3 to 5 feet (91 to 152 cm) tall and spreads 1 to 3 feet (30 to 91 cm) wide. Give each plant that full spread so it has room to sway and air can move through the planting.
When to plant
Gaura keeps to the warm season and asks you not to rush it past frost. Start seed indoors 6 to 8 weeks before your last spring frost, set plants out once the soil has warmed, and enjoy bloom from late spring or summer through the first fall frosts.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Start seed indoors 6 to 8 weeks before the last spring frost.
- Plant: Transplant after the last spring frost once soil has warmed.
- Harvest: Blooms from late spring or summer through the first fall frosts.
Hardiness
USDA hardiness zones: 5–9
Temperature: down to -29°C
Troubleshooting
A gaura planting that loses its poise usually has one of two things going on: wet feet at the roots, or stale air around the foliage. Notice the early cues and you can put the display right before it slips. Match what you see below, then step in while it still helps.
A wilting plant that blackens low down and folds
When a planting wilts, darkens at the base, and slumps out of its place in the border, the culprit is root rot from soil that stays wet. A quick dig reveals dark, soft, mushy roots in ground that never quite dries. Reset the display by shifting the plant to a raised or sandier position, easing off the water, and letting go of anything past saving.
Fix:
- Improve drainage or move the plant to a raised or sandier site
- Reduce watering and allow soil to dry between waterings
- Remove and discard severely rotted plants
A pale, dusty veil over the foliage
That soft white haze dulling the leaves is powdery mildew, and it moves in where plantings sit close together with little air passing through. A light rub lifts the dust away. Give the arrangement more breathing space by thinning and spacing it, clear the worst leaves, and keep the water off the foliage to restore the clean look.
Fix:
- Improve air circulation by spacing and thinning plants
- Remove affected foliage
- Avoid overhead watering
Rusty spotting turning up beneath the leaves
Raised orange to brown pustules hidden under the leaves are the mark of rust, a fungus that thrives on damp, still foliage and quietly mars an otherwise elegant planting. Remove and destroy the affected leaves before it travels through the group. Open the arrangement for better airflow and direct the water to the soil, keeping the display crisp.
Fix:
- Remove and destroy infected leaves
- Improve air circulation
- Avoid wetting foliage when watering
Lanky stems that lean out of the border
Gaura's thin, wiry stems drift and sprawl when nothing steadies them, and rich soil or too much shade pulls the whole planting off its lines. The lean shows most after rain or in a shaded corner. Cut the leggy stems back for a fuller rebloom, place the plant in full sun and leaner ground, and let confident neighbors frame and support it.
Fix:
- Cut back leggy stems to encourage bushier rebloom
- Plant near sturdy companions that provide support
- Grow in full sun and leaner soil
Toxicity
For a home with animals, gaura is an easy conscience: it is non-toxic throughout. It does not appear on the ASPCA list of plants toxic to dogs or cats, and no part of it poses a poisoning risk to pets, livestock, or people. Weave it through the garden wherever curious noses wander.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A household cat is entirely safe around gaura. A stray nibble on the border will not poison them, so the planting stays worry-free.
Dogs None
A dog can move through a gaura planting with nothing to fear. The plant is absent from the ASPCA toxic list, and a mouthful of foliage does no harm.
Horses Safe
Horses can graze near a gaura border in peace, since the plant holds no known toxin to trouble them.
Rabbits Safe
Rabbits can browse the leaves with no ill effect, though it is wise to let them ease into any fresh green.
Livestock Safe
Cattle, goats, and sheep can graze around gaura with no danger, as it poses no toxic threat where they roam.
Birds Safe
Birds settle happily around a gaura planting. Its flowers even invite pollinators into the scene, and nothing in the plant is toxic to them.
People Safe
Gaura is harmless to people, grown for looks alone as an ornamental, so it can be handled and planted with complete ease.
Varieties
A handful of named selections let you tune gaura to the scale and color a space calls for. These are the ones worth knowing when you plan a scheme.
Whirling Butterflies
A refined 2 to 3 foot selection whose white flowers and pink buds hover on wiry stems, and its sterility keeps it from scattering seed across a curated bed.
Siskiyou Pink
A pink-flowered cultivar defined by dark stems and reddish new growth that lend a moody accent.
Belleza
A dwarf, compact series bred for a tidier habit and heavy bloom that suits smaller, styled spaces.
Summer Breeze
A taller statement at roughly 3 to 4 feet tall and 2 to 3 feet wide, awash in pink-tinged white flowers.
How to propagate
You can spread gaura through the garden from seed or by dividing an established clump, though the deep taproot asks for a gentle hand either way.
SeedModerate
Sow in spring; the species self-seeds readily while many named cultivars are sterile. · Blooms the first or second season from seed.
Sow the species in spring and it drifts and reseeds itself with a relaxed, cottage feel, its first flowers arriving in the first or second season. Keep in mind that many named cultivars are sterile, so those are carried on through division or cuttings rather than seed.
DivisionModerate
Divide in spring, taking care with the deep taproot. · Reestablishes over one growing season.
Divide in spring to spread a favorite through the garden, working gently since the deep taproot dislikes being disturbed. A clump finds its footing again over a single growing season, and where the taproot makes division delicate, basal cuttings are the graceful alternative.
Myths
Gaura needs frequent watering and rich, fertile soil to thrive.
In practice, the taproot lets it sail through drought and heat once it has settled into its spot. Lean, well-drained soil is exactly its taste, while rich ground and heavy watering dull the flowering and invite root rot.
Gaura is poisonous to dogs and cats.
It never appears on the ASPCA list of plants toxic to dogs or cats. Gaura is considered non-toxic, making it an easy, elegant choice for a garden shared with pets.