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Thermopsis

Thermopsis montana

outdoor

A stunning perennial shrub native to mountain regions of the western United States, bearing bright yellow pea-like flowers in dense upright spikes during late spring and early summer. With its legume-fixed nitrogen ability and deep root system, it is exceptionally drought-tolerant and requires minimal care once established. The architectural form and cheerful blooms make it an excellent choice for sunny borders, banks, and naturalized areas.

Thermopsis

Common Problems

Select the problem your Thermopsis is experiencing to get a treatment guide.

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Underwateringchevron_right
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Slow Growthchevron_right
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Yellow Leaveschevron_right

Care Guide

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Light
Full sun; requires 6+ hours of direct sunlight daily for optimal growth and flowering
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Water
Low to moderate; water regularly during establishment, then reduce; drought-tolerant once mature
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Soil
Well-draining, sandy or gravelly loam; poor fertility tolerable due to nitrogen-fixing ability; avoid heavy clay
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Fertiliser
Minimal or none required; nitrogen-fixing legume requires little supplemental feeding
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Temperature
Cool to moderate; very hardy to cold and frost; prefers temperate climates without excessive heat
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Humidity
Low to moderate; tolerates dry conditions; prefers good air circulation

Toxicity

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Non-toxic; safe for humans and pets

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Thermopsis Care Guide — Thermopsis montana | GreenScout