Wildseed Farms' regional wildflower mixtures have been formulated according to the diverse variations in rainfall, temperature, elevation and soil types commonly found from region to region. The wild flower species included within each blend were selected according to plant height, blooming period, color and the ability to reseed. Each regional mixture contains a balance of annual (Type A) and perennial (Type P) varieties to provide a broad range of colors and a lengthy display of blooms. If you happen to be on or near a dividing line you should be able to plant either mix or both. (we had to draw a line somewhere).