Sowing Wildflower Seed
A small amount of wildflower seed goes a long way. When hand broadcasting the seed, it is good to mix the seed with damp sand (4:1 sand to seed) to help prevent clumping and to provide even distribution. Rake the seed in lightly, being careful not to bury it too deeply (especially the smaller seeded wildflowers), as this will prevent the delicate shoots from penetrating the soil surface. As a good rule of thumb, bury the seed no deeper than 1/8 - 1/4 of an inch. Tamp to firm the seedbed after seeding.
Leftover seed should be stored in a cool, dry place, as heat and humidity can cause loss of germination. Properly stored seeds should remain viable for planting the following year with minimal loss of germination.