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When to plant tulips in Indianapolis: 7 October – 23 December

In Indianapolis, tulip: plant from 7 October to about 23 December.

Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

The date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Tulip in Indianapolis: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -5 °C.

Planting7 October – 23 December
First autumn frost6 November
Coldest nightsJanuary, -5 °C
Soil back at 7 °C in spring11 March
Daylight11:33 on 7 October
Daylight at the winter solstice9:21

The same dates in Indianapolis hold for Garlic, Daffodil, Crocus and Hyacinth.

Tulip in Indianapolis: depth, winter cold, pests and pets

Plant tulips at a depth of two to three times the bulb’s height, at least twice the bulb’s width apart, pointed end up (RHS). Where winters are very cold, tulips benefit from deeper planting to protect them from frost penetrating the soil (RHS); here the average daily temperature drops below 0 °C in winter.

In Indianapolis the average daily temperature stays at 10 °C or lower for about 22 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 15–17 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Border tulips often fail to flower in their second year if left in the ground, so many gardeners grow them for one spring and plant fresh bulbs each autumn; Darwin hybrid and Kaufmanniana tulips reflower more reliably (RHS). Soils that stay wet in summer make reflowering difficult (RHS): in Indianapolis the three warmest months bring about 301 mm of rain together.

Grey squirrels often dig up tulip bulbs: lay chicken wire over the bed until the leaves appear, or plant daffodils among them, which squirrels avoid (RHS). Tulips are toxic to dogs, cats and horses, the bulb most of all (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Tulip in nearby cities

Around Indianapolis, Fort Wayne is 4 days earlier and Louisville 5 days later.

CityDistanceDateDifference
Cincinnati159 km10 October – end of December3 days later
Fort Wayne169 km3 October – 10 December4 days earlier
Louisville173 km12 October – end of December5 days later
Frankfort207 km4 October – end of December3 days earlier
Evansville233 km11 October – end of December4 days later
Lexington246 km8 October – end of December1 day later

Where to buy tulip for planting in Indianapolis

Planting stock goes into the ground from 7 October to about 23 December; buy it before that. Within 15 km of Indianapolis OpenStreetMap lists 9 garden centres, 1 farm-supply shop, 2 plant nurseries and 4 markets (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant tulips in Indianapolis?

In Indianapolis, tulip: plant from 7 October to about 23 December. Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

When is the last spring frost in Indianapolis?

Last spring frost around 14 April, first autumn frost around 6 November.

Other crops in Indianapolis, with their dates