When spring weather is warm and settled, and nights are reliably above 50°F (10°C), prepare the planting area by removing all weeds, grass, large clumps and stones. Loosen the top 2 inches of soil with a digging fork or shovel, then smooth with a flat rake.
Scatter mix thinly and evenly. Using your rake, work to cover the seeds with 1/2-1 inch of soil, then use planting mix or compost to cover any exposed seed mix. Water thoroughly with a gentle mist.
Keep weeded and watered; protect tiny seedlings from birds by using netting or ribbons of shiny, reflective flash tape at planting time. When 3-4 inches tall, remove covering and thin seedlings to 10-12 inches apart. This spacing is critical for sturdy, windproof plants with good root systems and large flowers.