North America Native Plant

Chinese Houses

Botanical name: Collinsia concolor

USDA symbol: COCO

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Chinese Houses: A Delicate California Native for Spring Gardens If you’re looking to add a touch of understated elegance to your California native garden, Chinese houses (Collinsia concolor) might just be the perfect annual wildflower for you. This charming little forb brings delicate beauty to spring landscapes with its soft-colored ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Chinese Houses: A Delicate California Native for Spring Gardens

If you’re looking to add a touch of understated elegance to your California native garden, Chinese houses (Collinsia concolor) might just be the perfect annual wildflower for you. This charming little forb brings delicate beauty to spring landscapes with its soft-colored blooms and graceful growth habit.

What Are Chinese Houses?

Chinese houses are annual herbaceous plants native to California’s lower elevations. As a forb, this plant lacks woody tissue and completes its entire life cycle in a single growing season. The name Chinese houses comes from the tiered, pagoda-like arrangement of flowers along the stem, though Collinsia concolor’s blooms are more subtle than some of its showier cousins in the genus.

Where Chinese Houses Call Home

This California endemic is naturally found throughout the state, particularly in the Sierra Nevada foothills and Central Valley regions. As a native species to the lower 48 states, Chinese houses have evolved to thrive in California’s Mediterranean climate and diverse ecosystems.

Why Grow Chinese Houses in Your Garden?

There are several compelling reasons to consider adding Chinese houses to your native plant palette:

  • Supports local ecosystems as a true California native
  • Provides nectar for native bees, flies, and other small pollinators
  • Creates beautiful naturalized drifts in wildflower meadows
  • Perfect for filling gaps in spring before perennials mature
  • Low-maintenance once established
  • Excellent for seed-saving and natural reseeding

Aesthetic Appeal and Garden Design

Chinese houses typically grow 6 to 18 inches tall, producing delicate white to pale pink flowers arranged in distinctive whorls along slender stems. The plant’s modest size and soft coloring make it an excellent companion for other native wildflowers and a perfect choice for:

  • Native plant gardens and naturalized areas
  • Rock gardens and dry slopes
  • Woodland edges and partially shaded spots
  • Spring ephemeral displays
  • Pollinator gardens focused on native species

Growing Conditions and Care

Chinese houses are relatively easy to grow when you match their preferred conditions:

Climate: Thrives in USDA zones 8-10, perfectly suited to California’s climate patterns

Light: Prefers partial shade to full sun, though some afternoon shade is beneficial in hot inland areas

Soil: Grows best in well-drained soils; tolerates clay, loam, and sandy conditions typical of California

Water: Needs moderate water during spring growing season, then naturally goes dormant in summer heat

Planting and Care Tips

Success with Chinese houses comes from mimicking their natural growing cycle:

  • Direct seed in fall (October-December) for spring germination
  • Seeds need winter chill period to break dormancy
  • Scatter seeds on prepared soil surface and lightly rake in
  • Water gently after planting, then rely on winter rains
  • Provide supplemental water during dry winter/spring periods
  • Allow plants to complete their cycle and self-seed for next year
  • No fertilizer needed – native soils provide adequate nutrition

Important Conservation Note

Chinese houses has a somewhat unclear conservation status, so it’s important to source seeds or plants from reputable native plant nurseries rather than collecting from wild populations. This helps protect existing communities while still allowing you to enjoy this lovely native in your garden.

Pollinator and Wildlife Benefits

While small in stature, Chinese houses punches above its weight when it comes to supporting local wildlife. The flowers attract native bees, beneficial flies, and other small pollinators that are crucial for maintaining healthy ecosystems. As an annual, it also provides seeds for birds and contributes to the natural food web.

The Bottom Line

Chinese houses offers California gardeners an opportunity to grow a truly local native that supports pollinators and adds delicate beauty to spring gardens. While it may not be the showiest wildflower in your collection, its understated charm and ecological value make it a worthwhile addition to any native plant enthusiast’s garden. Just remember to source your seeds responsibly and let this gentle annual work its quiet magic in your landscape.

Chinese Houses

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Collinsia Nutt. - blue eyed Mary

Species

Collinsia concolor Greene - Chinese houses

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA