How to Pre-Chill Tulip and Hyacinth Bulbs in Warm Zones

In zones 8b to 10, refrigerate tulip and hyacinth bulbs 6 to 10 weeks at 40 to 45F, away from fruit, then plant from mid December to early January.

Published 2026-10-06 by ThriveThyme

bulbs tulips warm zones zone 9 zone 10

The Short Answer

In zones 8b, 9, and 10, put tulip and hyacinth bulbs in the refrigerator for 6 to 10 weeks at 40 to 45F, then plant them from mid December to early January. For a Dec 15 planting with 8 weeks of chill, start by about Oct 20. Keep them away from fruit.

Your dates are on the Bulb Desk. Pick zone 9 or 10.

Which Bulbs Need It

Tulips: yes.
Dutch hyacinths: yes.
Crocus: yes, and even then they are hard to grow in the warmest zones.
Daffodils: most jonquil and tazetta (paperwhite) types do not need it. Plant those in October and November.

Texas A&M AgriLife lists tulips, crocus, some narcissus, and Dutch hyacinth as needing 6 to 10 weeks of chilling in Texas.

How to Chill Them

Use the refrigerator, not the freezer. Aim for 40 to 45F.
Keep bulbs away from apples, tomatoes, lettuce, and other produce. Ripening fruit gives off ethylene gas, which damages the flower inside the bulb.
Store them in paper bags or mesh bags. Do not seal them airtight.
Label the bag with the start date.

When to Plant

Plant from mid December to early January, when nights have been under 50F for several weeks. LSU AgCenter finds the best results from late December to early January plantings. Planting into soil that is still warm can undo the chill. Move bulbs straight from the refrigerator to the ground.

Depth: 6 to 8 inches for tulips, 6 inches for hyacinths.
Spacing: tulips 4 to 6 inches apart, hyacinths about 6 inches apart.
Water in well.

Do Not Buy Late Unchilled Bulbs

LSU AgCenter warns that tulip and hyacinth bulbs bought on sale in late December or January will not bloom well unless they were already refrigerated. Buy in early fall and start chilling. Chilled bulbs also cannot be held over for the next year.

Will They Come Back?

No. In zones 8b to 10 treat tulips and hyacinths as annuals. Pull them after bloom and buy fresh bulbs next fall.

Sources

Next Steps

Set your zone on the Bulb Desk for the chill-by date. Planting daffodils too? Read when to plant daffodil bulbs by zone. For the rest of the warm-zone fall garden, see what to plant in October, zone 9 and zone 10.