Gladiolus Corm Storage and Replanting in Zone 6

Gladiolus corms are not reliably hardy in Zone 6. Annual lift-and-store ensures survival and bloom quality.

Fall Protocol (After First Frost)

1. Dig corms; shake off soil (do not wash).
2. Cut foliage to 2 cm.
3. Cure 2–3 weeks in airy, shaded spot (20 °C).
4. Dust with fungicide if any rot signs.
5. Store in mesh bags in cool (2–5 °C), dry, dark basement.

Spring Planting

• Plant after last frost when soil ≥15 °C (60 °F).
• Depth: 15 cm (6 in); spacing: 15 cm.
• Bloom ~90 days after planting.

Tip

In warm microclimates, some corms may overwinter in ground with heavy mulch, but lifting is insurance.