1/4-1/2" Tip: Nick or file the seed coat prior to soaking seeds in warm water for 24 hours prior to sowing.
Seed To Bloom:
Sow in pots about 4 weeks before last frost. Keep at 65-80°F. Cover with humidity dome to retain moisture until germination occurs.
Direct sow about two weeks after last frost.
WHEN TO SET OUTSIDE
After last frost, when soil has warmed.
PLACEMENT & CULTIVATION
This old-fashioned twining vine has smaller flowers than I. nil, but makes up for that with its cheerful free-blooming nature. Provide a tall trellis or fence for Morning glory Crimson Rambler to twine about. Blooming starts later in mid-summer and continues until fall frost, the flowers staying open in cloudy weather or in the fainter light of fall.
About 1" per week, more during especially dry, hot spells.
Slightly acidic to slightly alkaline.
Mix in 2" of compost prior to planting and apply a flower fertilizer at bud set for more abundant blooming. Avoid nitrogen fertilizers that favor foliage growth over flower development.