How to Plant Gladiolus Bulbs
Planting Instructions
- Timing: Plant bulbs in spring after the last frost, when soil temperatures are at least 60°F.
- Location: Choose a sunny spot with well-drained soil. Gladiolus do not tolerate soggy conditions.
- Preparation: Loosen soil to a depth of 12 inches. Mix in compost or well-rotted manure to improve drainage and fertility.
- Spacing: Plant bulbs (corms) 4–6 inches apart, in rows or clusters for the best visual effect.
- Depth: Dig a hole 4-6 inches deep and place the bulb with the pointed side up. Cover with soil and gently press down.
Watering
- Water thoroughly after planting to settle the soil.
- Keep the soil evenly moist during the growing season, but avoid waterlogging.
Fertilizing
- Apply a balanced, slow-release fertilizer (10-10-10) when planting.
- Feed again when flower spikes emerge for larger blooms.
Care and Maintenance
- Stake the plants if they grow tall and start to lean.
- Deadhead spent blooms to encourage continuous flowering.
- In colder climates, dig up bulbs after the first frost, dry them, and store them in a cool, dry place until spring.
Container Planting
- Use a pot at least 12 inches deep with drainage holes.
- Plant bulbs 4-6 inches deep in a light potting mix.
- Follow the same watering and fertilizing instructions as for garden planting.