Grow Gladiolus for Reliable Summer Color Year After Year

Gladiolus (technically corms, not bulbs) deliver dramatic vertical spikes of orchid-like blooms in mid-to-late summer—and return annually with minimal care.

Color Range and Impact

Available in white, pink, orange, red (highest impact), bicolors, and rare blues. Plant in groups of 5+ same color for maximum visual punch (cottage gardens excepted).

Planting Strategy for Extended Bloom

• When: April through May
• Sun: 4+ hours daily
• Depth: 4-5" (10-12 cm)
• Spacing: 4" apart
• Soil: Rich, well-drained (critical—wet winter soil rots corms)
• Stagger plantings weekly for 6-8 week bloom season

Growth and Harvest

Sword-shaped leaves (Latin gladius = little sword) rise first, then flower spikes bloom bottom-to-top over 2-3 weeks. Cut flowers: Take 3-5 color stems, but leave foliage on the plant—removing all leaves weakens next year's bloom.

Miniature Hybrids

Ask for Primulinus types: 2' tall, no staking needed. Perfect for smaller spaces and containers.

Gladiolus combine old-fashioned charm with modern reliability. A few corms planted each spring yield armloads of dramatic cut flowers and garden architecture for years.