Growing Gladiolus: Planting, Care & Corm Storage

Growing Gladiolus

Spacing: 6″ | Depth: 4–6″ | Full Sun

Gladiolus produce elegant spikes of orchid-like flowers in every color but true blue. They thrive in the same conditions as garden vegetables: average, well-drained, slightly acidic soil (pH 6.0–6.5). Good drainage is non-negotiable.

Planting and Feeding

Plant corms a month before the last frost, then at two-week intervals until late June for successive blooms. Use a low-nitrogen fertilizer (5-10-5) to promote flowers over foliage. Water deeply once a week (1 inch) if rain is lacking.

Harvesting and Storing Corms

Before frost, dig corms, wash off soil, and cut stems to ½ inch. Cure 2–3 weeks in a warm, airy place. Store in mesh bags at 35–45°F in a well-ventilated area until spring replanting.