Collinsia heterophylla, commonly known as Chinese houses, is a striking wildflower native to California, USA. It is part of the Plantaginaceae family and is known for its layered, pagoda-like structure of flowers, which gives it the name “Chinese houses.”

Appearance:

Flowers: The flowers are usually purple or violet and white, arranged in distinct tiers. Each whorl of flowers gives the plant a unique pagoda-like appearance, blooming from the bottom to the top.

Leaves: The leaves are lance-shaped and alternate along the stem, with slightly toothed margins.

Size: Collinsia heterophylla typically grows to a height of around 30-60 cm.

Best Environment:

Climate: This plant thrives in temperate climates and is well-suited to Mediterranean-style conditions. It grows well into late winter to spring.

Light: It prefers partial shade but can tolerate full sun in cooler climates. In hot Australian summers, providing some afternoon shade is beneficial.

Soil: It grows best in well-draining soil that is slightly acidic to neutral (pH 6.0-7.0). Sandy loam or loamy soil is ideal for this species.

Water: It requires moderate watering, especially when establishing the seeds or seedlings. Once established, it is fairly drought-tolerant, but regular watering will encourage better blooms.

How to Grow Collinsia Heterophylla from Seed:

Sowing Time: In Australia, sow the seeds in late autumn or early winter (April-July) for flowering in late winter to spring.

Seed Preparation: Direct sowing into the ground is ideal. No special treatment is necessary for the seeds.

Sowing Depth: Scatter the seeds on the surface and lightly press them into the soil. Do not cover them with too much soil as they need light to germinate.

Spacing: Space the seeds about 15-20 cm apart to allow room for growth.

Watering: Keep the soil moist until the seeds germinate, which should take about 10-20 days.

Care: Once the plants are established, they require minimal care. Deadheading spent flowers can encourage more blooms. They will self sow for more the following year.

Collinsia heterophylla is a low-maintenance, eye-catching plant that is well-suited to cottage gardens, wildflower meadows, or even containers. It attracts pollinators like bees and butterflies, making it an excellent choice for biodiversity-friendly gardens.

Pictures By Stickpen – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10268204

English: NPS, Public domain, via Wikimedia Commons

Meadow pic by Jay Huang from Pleasanton, USA, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons