Big, bold, and bursting with color from midsummer through frost. Zinnias are heat-lovers that reward you with weeks of blooms â and they make incredible cut flowers.
âïļ
Sunlight
Full sun, 6+ hrs
ð§
Water
Moderate, water at base
ðą
Type
Annual
ðŠī
Soil
Well-drained, fertile
Growing Basics
Zinnias are annuals in Minnesota â they love heat and hate frost, but they grow fast once warm weather arrives.
Sunlight: Full sun (6+ hours daily). The more sun, the better they bloom.
Soil: Well-drained, moderately fertile soil.
Transplanting: Plant after all danger of frost has passed and the soil has warmed. Plant at the same depth as in the pot.
Watering: Water deeply at the base of the plant, not overhead. Wet foliage promotes powdery mildew, which is the most common problem with zinnias. Let the top inch of soil dry between waterings.
Fertilization: Feed every 4â6 weeks with a balanced fertilizer (10-10-10) for the best bloom production.
Other Tips
Deadhead spent blooms to keep new flowers coming all season. Zinnias are one of those plants where the more you cut, the more they bloom.
If powdery mildew (white coating on leaves) appears, improve air circulation by thinning plants and avoid overhead watering. It's mostly cosmetic and won't stop blooming.
Outstanding cut flower â stems last 7â10 days in a vase. Cut in the morning when stems are firm.
