15-18" x 4-6' wide, (seed propagated). In its full afternoon glory, Wild Four O'clock has few rivals. A mature plant will have hundreds of magenta-pink flowers open at one time! This short grass prairie wildflower is one of our most xeric species with an enormous, deep-growing taproot. Plant it in any soil, even clay, where it will get plenty of sun and heat. Once established, it grows best when given very little extra irrigation. Zones 4-8. 5" deep Premium pot.