Fabaceae
Oxytropis lambertii var. lambertii
Oxytropis lambertii var. lambertii var. lambertii
Also known as Oxytropis lambertii f. mixta, Aragallus aven-nelsonii, Aragallus plattensis, Oxytropis angustata
Flowering Plants · Native Plants · Locoweed · Great Plains · Native · Prairie Wildflower · Purple Flowers · Toxic · Legume · Rock Garden · Pollinator · Dry Soil
Lambert's locoweed is a native Great Plains perennial forming low clumps of silvery, pinnate leaves topped with vivid purple to reddish-purple flower spikes in late spring. It performs best in full sun with poor to moderately fertile, sharply drained soil and is well suited to prairie restorations, rock gardens, and native wildflower plantings. All parts are toxic to grazing animals, so site carefully in mixed-use landscapes.
Growing conditions
The details behind the basics
- Daily light
- 7 hours
- Watering
- Water lightly; soil should be well-drained and allowed to dry between waterings · Every 10-14 days during active growth
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.4–9
- Temperature
- -20°F to 90°F
- Cycle
- Perennial
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 18 in – 3 ft
- Spread
- 2 ft
- Spacing
- 18 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- British Columbia, Iowa, Kansas, Manitoba, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oklahoma, Saskatchewan, South Dakota, Wyoming
- Attracts
- Bees, Butterflies
Sources: trefle, usda
More Oxytropis
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Purple locoweed
Oxytropis lambertii
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Showy locoweed
Oxytropis splendens
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Oxytropis lambertii var. articulata
Oxytropis lambertii var. articulata
Full Sun · Moderate · Moderate
Oxytropis lambertii var. bigelovii
Oxytropis lambertii var. bigelovii
Partial Sun · Moderate · Moderate
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