In mild winter climates, where the ground does not freeze hard, poppies can be sown in late fall to overwinter for spring bloom. Or, plant as early as possible in spring, as poppies can handle light frosts and bloom longest when given a good start in cool weather.
To prepare the planting area: remove all weeds, grass and large stones. Break up soil clumps and evenly loosen the top 2 inches of soil with a digging fork or shovel, then smooth out with a flat rake.
Shake the can thoroughly before opening, then scatter the contents thinly and evenly over the prepared ground. Using your rake, cover the seed mixture 1/4 inch deep and lightly firm the soil. Water with a gentle mist thoroughly and evenly. Keep the soil moist while awaiting germination and while the seedlings are small.