Coverage and Viability

Coverage Rates of Annual Wildflowers, By Weight

Use the square footage (multiply length x width) to determine how much seed you need. Applications will vary depending on species, slope, soil and weather conditions. Steeper slopes usually require more seed than flat areas, but measures should be taken, such as the use of jute netting, or terracing, to avoid the seed being washed to the bottom of the slope.

Remember, erosion is prevented not by the presence of newly germinating seeds or young seedlings, but by the root systems and above ground biomass of established plants. One possible strategy involves planting before the wet season, supplying gentle irrigation to begin germination. Then already growing plants can take advantage of the rains, when they come.

It is not desirable to thin wildflowers once they have germinated.

Viability: Seed that is not used when purchased will remain viable, with little change in germination rates, for up to three years, if it is kept in a cool, dry, dark location. Seed can be purchased in spring, when you have the opportunity to see spring bloom and make choices, then sown in late summer.

  • 1/2 oz. sows an area approximately 25 sq. ft., or an area 5' x 5'.
  • 1 oz. sows an area approximately 50 sq. ft., or 10' x 5'.
  • 1/4 lb. sows an area approximately 200 sq. ft., or 10' x 20'.
  • 1/2 lb. sows an area approximately 400 sq.ft., or 20' x 20'.
  • 1 lb. sows an area approximately 800 - 1,000 sq. ft., or 20' x 40' to 50'x20

Perennial Wildflowers and Native Grasses

These packets supply enough hand-collected seed for twenty to thirty plants, depending on the species.