For best results, plant spring-flowering bulbs (like tulips, daffodils, hyacinths, crocus, and alliums) in the fall after the first frost and before the ground freezes. This gives them time to establish roots before winter and ensures they bloom properly in the spring.
Ideal Timing by Zone:
Here’s a general guideline based on USDA hardiness zones:
Zones 2–4 (colder climates): Late August to September
Zones 5–7 (temperate areas): September to October
Zones 8–10 (mild winters): October to November (chill bulbs in the fridge for 6–8 weeks first if required—like tulips)
Key Tips:
Soil temperature should be below 60°F (16°C) when you plant—usually a few weeks before the first hard frost.
Plant bulbs pointy end up, about 2–3 times as deep as the bulb is tall.
Water them well after planting.
Add mulch in colder zones to insulate them over winter.