Zinnia

Zinnias prefer well-drained soil with a pH of 5.5-7.5 and moderate fertility. Work in compost and avoid excessive nitrogen, then keep plants well spaced to reduce leaf diseases.

Sun

Full sun

Water

1 in/week at the base

Spacing

10 in

First harvest

60–70 days

Tips

• Sow seeds about 1/4 inch deep and thin to at least 10 inches apart, giving large cultivars more room.
• Supply about 1 inch of water weekly at the soil surface without wetting foliage.
• Feed lightly with a balanced fertilizer if soil is poor, following the label rate.
• Watch for powdery mildew and bacterial leaf spot, and remove badly affected leaves without handling wet plants.
• Cut flowers regularly above a leaf node and remove faded heads to encourage new blooms.