Plant tulip bulbs in fall, once the soil at planting depth stays below 60 °F: mid-September to October in zones 3 to 6 and November to early December in zones 7 and 8. In the warm South (zones 8 to 10), keep the bulbs in the refrigerator and plant them from November to January. Set them 6 to 8 inches deep, pointed end up.
When to plant tulips, by zone
Each row is the planting window from the extension service for a region in that zone. Find your zone on the USDA hardiness zone map (our zone finder is coming soon), then read across.
Mid-September to mid-October; tulips can go in as late as you can still get them into the soil · University of Minnesota
October · NC State Extension
November or early December, once the soil at planting depth is below 60 °F · NC State Extension
November to late December, keeping the bulbs in the refrigerator until you plant · Clemson HGIC
Late December or early January, after chilling in the refrigerator · Clemson HGIC
In winter, using bulbs pre-chilled for two to four months · UF/IFAS Extension
Zones for each region are from the 2023 USDA map. A zone measures winter cold, not the date of the first frost, so treat the months as a guide and check the soil.
The 60 °F rule
NC State and Clemson both wait until the soil at planting depth stays below 60 °F before planting spring bulbs. To check, push a soil thermometer down to planting depth, 6 to 8 inches, on a few days in a row.
In cold zones the clock runs the other way: the bulbs need time to root before the ground freezes. The University of Minnesota plants hardy bulbs from mid-September to mid-October for that reason, but makes an exception for tulips, which can go in as late as you can get them into the soil.
How deep to plant tulip bulbs
Clemson plants tulips 6 to 8 inches deep and 4 to 6 inches apart; Illinois Extension puts large bulbs such as tulips about 8 inches deep. Depth is measured to the bottom of the bulb. The general rules behind those numbers:
- Two to three times as deep as the bulb is tall (Illinois Extension), or two to three times its diameter (University of Minnesota).
- In sandy soil, go 1 to 2 inches deeper; in heavy clay, 1 to 2 inches shallower (University of Minnesota).
- Pointed end up, with the flat base, where the roots grow, resting at the planting depth.
After planting, the University of Minnesota fills the hole halfway, soaks it with water, then fills it to the top. Both it and Illinois Extension finish with 2 to 3 inches of mulch.
Warm zones: chill the bulbs first
Most spring bulbs need 12 to 16 weeks of cold to flower, Clemson says. Without it, they bloom close to the ground on very short stems. Where winters are mild, you supply the cold:
- Refrigerate the bulbs as soon as you buy them, in ventilated packages, until planting time (Clemson). UF/IFAS uses bulbs pre-chilled for two to four months.
- Keep fruit out of that refrigerator. Ripening fruit gives off ethylene gas, which can stop the bulbs from blooming (Clemson, Illinois Extension).
- Plant them straight from the refrigerator in November to late December in central South Carolina, late December or early January on the coast (Clemson), or in winter in Florida (UF/IFAS).
In these zones, tulips are usually grown for one season. Clemson says they can only be counted on for a single season of color in South Carolina and are treated like annuals; UF/IFAS says the same for Florida. NC State counts tulips that come back for three years as a success in the South.
Is it too late to plant tulips?
Probably not. Tulips can go in as late as you can get them into the soil (University of Minnesota), and most bulbs can be planted until the ground freezes (Illinois Extension).
Spring is too late for unchilled bulbs. NC State says spring bulbs need from 6 to 20 weeks of cold, depending on the type, and bulbs planted after winter haven’t had it.
Questions people ask
What month do you plant tulip bulbs?
September or October in zones 3 to 6, November or early December in zones 7 and 8, and December or January in the warmest zones, with bulbs chilled in the refrigerator first.
How deep do you plant tulip bulbs?
6 to 8 inches deep to the base of the bulb (Clemson), about 8 inches for large bulbs (Illinois Extension). Go a little deeper in sandy soil and a little shallower in clay.
How far apart do you plant tulips?
4 to 6 inches apart (Clemson). The University of Minnesota suggests groups of odd numbers or mass plantings, which look better than single rows.
Which way up does a tulip bulb go?
Pointed end up, flat base down.
Can you leave tulip bulbs in the ground all year?
Yes, where winters are cold enough to chill them in the ground. In the warm South, Clemson treats tulips as annuals: dug up and discarded after they bloom.
Sources
- University of Minnesota Extension, Planting bulbs, tubers and rhizomes (Mary H. Meyer): mid-September to mid-October in Minnesota; tulips as late as you can get them into the soil; 2–3 times the bulb’s diameter, deeper in sand and shallower in clay; water halfway; 2–3 in of mulch.
- NC State Extension, Extension Gardener Handbook, chapter 10: Herbaceous Ornamentals: soil below 60 °F at planting depth; October in zone 6; November or early December in zones 7 and 8; a cold requirement of 6 to 20 weeks; tulips that last three years count as perennials in the South.
- Clemson Cooperative Extension, Home & Garden Information Center, Spring-Flowering Bulbs (Karen Russ and Robert F. Polomski, updated 2023): soil below 60 °F; 12–16 weeks of chilling; refrigerate tulips until planting in November to late December, late December or early January on the coast; keep fruit away; 6–8 in deep, 4–6 in apart; tulips as annuals.
- Illinois Extension, Planting Bulbs: plant most bulbs until the ground is frozen; 2–3 times as deep as the bulb is tall; tulips and daffodils about 8 in deep; 2–3 in of mulch; ethylene from ripening fruit.
- UF/IFAS Gardening Solutions, Tulips: bulbs pre-chilled for two to four months, planted in winter and grown as annuals in Florida.
- Zones: USDA Plant Hardiness Zone Map (2023), and the ZIP-code listing from the PRISM Group, Oregon State University, prism.oregonstate.edu, accessed October 11, 2026.