Plant of the Month: Camassia

Kristen Lackajis • April 15, 2026

Commonly known as ‘Quamash’ or ‘Indian Hyacinth,’ Camassia is a hardy, spring-flowering bulb that bridges the gap between late spring and early summer.

It features tall, upright spikes adorned with star-shaped flowers that rise above clumps of narrow, strap-like green foliage. Unlike many other bulbs, Camassia thrives in heavier, damper soils, making it a reliable choice for areas where tulips or daffodils might struggle.


Key Features:

  • Flower Colour: Stunning shades of celestial blue, deep violet, or creamy white. The flowers bloom sequentially from the bottom of the spike upwards.
  • Size: Typically grows to 60cm–90cm tall and 10cm–20cm wide, depending on the variety.
  • Hardiness: Fully hardy; able to withstand cold winters across most regions.
  • Sunlight: Thrives in full sun but can tolerate partial shade.
  • Soil: Prefers moist, fertile, and humus-rich soil. It is uniquely tolerant of heavy clay and occasional winter dampness.
  • Maintenance: Low maintenance; simply allow the foliage to die back naturally after flowering to nourish the bulb.


Uses:

  • Naturalising: Perfect for planting in wildflower meadows or long grass where they can drift and multiply over time.
  • Borders: Provides vertical interest and vibrant colour in the middle or back of mixed perennial borders.


Planting and Care:

  • Planting: Ideally planted in autumn (September to November). Plant bulbs approximately 10cm–15cm deep and space them 15cm–20cm apart.
  • Watering: Requires consistent moisture during the growing season and flowering period. Do not allow the soil to dry out completely in spring.
  • Fertilising: Benefit from a balanced general-purpose fertiliser applied in early spring as the first shoots appear.
  • Pruning: Cut the flower spikes down once they have faded if you wish to prevent self-seeding, but leave the leaves until they have turned yellow and withered.


Fun Fact:

  • Camassia bulbs were a major food staple for many North American Indigenous peoples (such as the Nez Perce and Blackfoot tribes) and were famously crucial to the survival of the Lewis and Clark expedition, providing a sweet, roasted food source. Warning: While edible and nutritious (similar to a sweet potato when roasted), Camassia is frequently confused with the deadly toxic "Death Camas" (Toxicoscordion venenosum), which grows in the same areas.


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