The most popular variety and one of the loveliest with vivid, true blue flowers. The color of these flowers is breathtaking, even if you have grown them for many summers, they still impress year after year. The 4-inch blooms are borne on vines that will climb to a height of 12 feet. This strain was discovered by amateur seed savers named Clarke in the 20's and is dependably early and full flowering.
Germination: 7-30 days, chipping seed coat or soaking seeds overnight aids in germination.
Seed Planting Depth: 1/4" deep
Starting Indoors: Start indoors 3-4 weeks before the last frost. Provide 70-85 degree F soil temperature. Using peat, cow,or paper pots can help with the stress of transplanting, they grow delicate roots and successful transplanting may be challenging.Transplant into the garden after the last frost. Water seedlings regularly until established.
Outside Sowing: After last frost, when soil is over 65 degrees F.
Growth Habit: Climbing, Trailing
Height and Width: 12 feet
Spacing: 12-18" apart
Light Needs : Full sun
Soil Needs : Well drained, poor to average
Approximate days to flower from seed: 90 plus days. Blooms toward the end of summer, the middle of August until frost.
Uses: Climbs trellises, fences and poles
Care: Mulching helps retain moisture. Over fertilizing can result in low to no flowers.