Allow 6 inches to 8 inches between plants and do not let them crowd. They flower in 8 weeks from seed and often self-sow, but such seedlings are often single and inferior in color and size. Succession in bloom is obtained by sowing at various times. Basketflowers are best sown in April, and not in the Fall. They require 1 foot between the plants, inasmuch as they are larger in growth than the Cornflowers.
Sweet sultans are best in cool climates.
They should be sown where they are to grow, for they are not the easiest of seedlings to transplant. They should stand 8 inches to 12 inches apart. Young seedlings damp-off easily when crowded or given too much water. Some growers believe that a limey, loose soil is necessary for success. Dusty-miller seed may be sown in January if a greenhouse is available.