Zinnias are the beginner cut-flower champion. Direct-sown seeds produce knee-high plants loaded with blooms in 60 days. Butterflies love them. The more you cut, the more they bloom.
Sun: Full sun. Water: Low. Zones: Annual. Height: 1–4 ft. Bloom time: Mid-summer to frost.
Direct-sow after last frost in warm soil. Space generously for airflow — crowded zinnias get powdery mildew. Cut flowers above a leaf node to trigger branching. Benary Giant and Queen Lime series are cutting-garden favorites.
Domande Frequenti
01 Why do my zinnias have white powder on the leaves?
Powdery mildew. Space plants 12–18 inches apart for airflow, water at soil level (not overhead), and plant mildew-resistant varieties like Profusion and Zahara series.
02 How long until zinnias bloom from seed?
60–70 days from direct sowing. If you start them indoors 4 weeks before last frost, you can have blooms by early July. Succession-sow every 2–3 weeks for continuous flowers until frost.
03 Where do I cut zinnias for longest bouquet vase life?
Cut above a pair of leaves on a main stem — this triggers two new stems to branch from that node. Use the "wiggle test" to check maturity: if the stem bends when shaken, wait. A firm stem means the flower is fully open and will last 7–10 days in water.