10 tall x 12-18 wide. Purple Mountain Sun Daisy (Osteospermum) is a compact but floriferous variety that blooms with strong red-violet flowers on green lanceolate foliage in early summer. Also known as African Daisy or Cape Daisy. A long bloomer, Purple Mountain is well adapted to higher elevations and cooler night temperatures. Osteospermum spreads slowly via surface rhizomes. For best results, plant in a full sun position in well-draining, average-to-fertile soil, as these plants tend to melt away in overly wet conditions. Regularly dead-heading will result in a longer bloom time, and tidying it with a light shearing after its first flush of bloom will result in a neater appearance and a higher chance of late summer/early fall blooms.