150 Phlox Large Flowered Collomia grandiflora Flower Seeds

The Gardening World

  • $2.49
    Unit price per 
Shipping calculated at checkout.

Large-Flowered Phlox, also called Large-Flowered Collomia, is an erect flower that stands up to 3 feet tall and has clusters of flowering buds at the top of its stem. It is native to the United States and Canada. Its leaves are lance shaped and its flowers are a tubular design that spreads outward to 5 oval-shaped petals.

These showy, flower clusters bloom on tall upright stalks. In the wild, the annual grows mainly in northwestern America and Canada but can be easily grown successfully in almost any garden.

This wildflower was first found near the Columbia River and described in 1828 by Scotsman David Douglas, the first botanist to methodically find and classify over 250 plants in the northwestern region of the United States. The genus name Collomia, bestowed by English botanist Thomas Nuttall, comes from the Greek word meaning "glue," a reference to the sticky seeds of the plants in this family. The species name "grandiflora" means large-flowered.


Name: Phlox Large Flowered
Other Common Names: Large-Flowered Collomia
Scientific Name: Collomia grandiflora
Color: Pink, Yellow and white
Hardiness Zones: 3-10
Plant Seeds: Outdoors After Frost or Indoors Weeks Before Last Frost
Plant Height: 4-36"
Plant Spacing: 9 - 12"
Cycle: Annual (Will reseed itself)
Weeks to Bloom - 6 to 8 weeks
Bloom Season - Summer
Light Requirements: Full Sun
Soil & Water Preferences: Average
Other: Attracts bees, birds, & butterflies,

Sowing: Direct sow in late fall, planting the seed just below the surface of the soil. For spring planting, mix the seed with moist sand and store it in the refrigerator for 30 days before direct sowing. Keep the soil evenly moist until germination, which should occur within 15-30 days. The treated seeds can also be started indoors 6-8 weeks before the last frost of spring; plant the seeds on the surface of a flat, keeping the moisture consistent and the temperature around 65-70 degrees F. Transplant or thin seedlings.

Growing: Water the seedlings occasionally until they become established. This plant grows best in rich, well drained soil, though it adapts to sandy or rocky soil. Mature plants tolerate dry or poor soil, though they will be somewhat stunted; they achieve their full potential with adequate moisture. This plant grows best in moderate temperatures, and does not appreciate excess heat. It attracts bees, butterflies, and hummingbirds.

All multiple orders of the same seed are put in the same bag. For example if you order 500 beefsteak tomato seeds x 3 then 1500 seeds will be put in the same bag. We do not send out 3 individual bags with 500 in each. This goes for all seeds unless they are listings of different seeds.


If you can’t find germinating and instructions online you can find them on the item page. Our goal is to save money everywhere we can so we can pass those savings on to you.

We Also Recommend