Morning glory is a classic vintage flower that boasts saucer-shaped flowers that attract hummingbirds. They love heat and prosper when planted into warm soil. The flowers twist open every morning in summer and stay open all day in cloudy weather or under the faint light of fall. A strong growing, vigorous twiner that easily climbs a 10' tall trellis is also effective on open fences or allowed to grab hold of string guides along a porch or solid fence. Avoid high nitrogen fertilizers that favor leaves over flowers; a high potash (K) tomato fertilizer will promote abundant flowering. Blooming starts later in mid-summer and continues until fall frost. Deadhead, if desired, to prolong flowering in longer season areas and avoid its sometimes robust self-sowing. Caution: the seeds contain ergot alkaloids and tryptamine compounds that are poisonous if consumed in significant amounts.