California poppy, a native wildflower, adds an easygoing dose of color hot, dry sites. Beautiful, satiny flowers in sunset colors wave above ferny, blue-green foliage. They like poor soils, especially sandy soils. If soil is too rich and moist, they won't bloom well. California poppies are a cool-season annual, which means they offer great color early in the growing season but fade once the heat of summer hits.Plant them from seed in the fall or very early spring. They like moist conditions at first, but they are drought-tolerant once established. They dislike transplanting. When the plants start to brown and fade, pull them up. However, California poppies will reseed easily; for more plants next year, allow some flowers to ripen to seed on the plant and scatter when you tear up those plants. Replant in fall if you like, especially in warmer-climate areas.