Start in pots 6-8 weeks before last spring frost. Keep at 70°F.
Recommended. Direct sow 1 week after last spring frost.
WHEN TO SET OUTSIDE
In springtime, after all danger of frost has passed.
PLACEMENT & CULTIVATION
Four o' Clocks grow rapidly from their small football-shaped dark seeds. Of branching growth, they soon create a small shrub studded with masses of orange-blossom scented flowers that wait until dusk to open. Attract hummingbirds for their last sip of the day and pollinating moths by night–all summer long. If you want to overwinter the tuberous roots, dig them up in autumn and store in a reasonably dry medium, in a cool, dry, frost-free location, such as a garage or basement.
Drought tolerant; 1" of water per week is plenty, for regular watering will promote more flowering.
Mix in a time release organic granular fertilizer; alternatively, feed monthly with a water soluble fertilizer.
Diseases & Pests:
No serious diseases or pests; if aphids appear on young plants, hose down or mist daily until the insects disappear. Japanese beetles can be picked off early morning and drowned in soapy water.