This map shows the ideal fall planting windows for the United States, helping you know exactly when to plant bulbs based on your region and climate.

A few important notes as you plan:

• Spring-flowering bulbs must be planted in fall. There’s no getting around it—this is a non-negotiable step if you want blooms come spring.

• Plant when soil temps hit about 55°F. Bulbs need cool—but not frozen—soil to start developing roots before winter settles in. This is key to helping them establish properly and thrive in the months ahead.

• You have about 8 weeks after the first frost. If the ground isn’t frozen, you can still plant. Don’t worry if you’re running a little behind—as long as you can get a shovel in the ground, it’s go time.

Colorblends makes it easy to meet your fall planting timeline. At checkout, you’ll have the option to choose a delivery week that lines up with your planting zone. Your bulbs will arrive sometime during that week—note that we can’t guarantee a specific delivery day.

Prefer to leave the timing to us? No problem. If you don’t choose a delivery window, we’ll ship your bulbs at the ideal time for planting in your area.

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