Also known as Fall Asters, these are terrific favorites for autumn colour in the perennial border. Plants form a bushy clump, bearing loads of small daisy flowers. This is a dwarf selection with double crimson-red blossoms. Pinch plants before July to maintain a cushion effect. Excellent for cutting. Most asters will be troubled much less with powdery mildew when grown in a moist, rich soil. Divide plants every two to four years to maintain vigour.