Allium bulbs are planted in fall for spring bloom. Unpack the bulbs as soon as they arrive and store them in a cool, dry, dark spot until you're ready to plant.
Planting
- Pick a sunny spot. Choose a site with full sun and soil that drains freely; avoid low areas where water collects.
- Dig 5-6 inches deep. Measure from the soil surface to the base of the bulb, or roughly three times the bulb's height.
- Point the tip up. Set each bulb with the pointed end facing up and the flatter root end down.
- Space 12-18 inches apart. Plant in clusters of 8-12 for the strongest visual impact rather than single-file rows.
- Backfill and water in. Cover with soil, firm gently, and water once to settle the bulbs.
- Container option. Use a deep pot with drainage holes and well-draining potting mix, spacing bulbs a few inches apart, and overwinter the pot where it stays cold but not waterlogged.
Watering
- Keep it light. Water after planting, then let fall and winter moisture do the work.
- Spring growth. Provide about an inch of water per week while stems and flowers are developing if rain is scarce.
- Go dry after bloom. Reduce watering once foliage yellows so the bulbs can rest; soggy summer soil causes rot.
Feeding
- At planting. Mix a balanced bulb fertilizer or bone meal into the bottom of the planting hole.
- Each spring. Scatter a light application of balanced granular fertilizer as shoots emerge.
Pruning & Aftercare
- Leave the leaves. Let foliage die back naturally to recharge the bulb for next year.
- Deadhead or dry. Cut spent heads for dried arrangements, or leave them standing for late-season structure.
- Mulch in cold zones. A 2-inch layer of mulch moderates winter freeze-thaw cycles.
- Divide as needed. Lift and separate crowded clumps every 3-4 years after the foliage fades.