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Flowering in just about 1 month from seed, Blue Diamonds supplies masses of shining periwinkle blue flowers with white centers on 12 to 18-inch tall, slender, branching stems. Also called Cape Stock in reference to its South African origin, Blue Diamonds prefers cooler temperatures, blooming from early spring to mid-summer.
Direct sow into prepared seed beds that have been cleared of weeds and have had the top 1 inch of soil loosened. Rake seed in. Press into soil by walking over the area. Keep moist until germination. Can also be started indoors in 2 inch pots.