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When to plant hyacinths in Milwaukee: 2 October – 25 November

In Milwaukee, hyacinth: plant from 2 October to about 25 November. For planting stock, the places nearby include Fred's Garden Center (garden centre, 8 km) and Stein's Garden and Home (garden centre, 11 km); addresses and opening hours are below.

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).

Hyacinth in Milwaukee: soil, season and weather

Nights then average below 0 °C in December–March; the coldest, January, averages -8.2 °C.

Planting2 October – 25 November
First autumn frost1 November
Coldest nightsJanuary, -8.2 °C
Soil back at 1 °C in spring3 February
Daylight11:43 on 2 October
Daylight at the winter solstice9:00

The same dates in Milwaukee hold for Garlic, Tulip, Daffodil and Crocus.

Hyacinth in Milwaukee: depth, winter cold, pests and pets

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS). In the ground hyacinths are fully hardy, but in containers they can be frost tender in cold winters (RHS); here winter nights average below 0 °C, so wrap the pots or move them to a sheltered spot.

In Milwaukee the average daily temperature stays at 10 °C or lower for about 26 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 12–15 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Flowers get smaller in the years after planting: for full spikes, replace the bulbs or add a few new ones each autumn (RHS).

If squirrels are a problem, protect the bulbs with wire mesh (RHS). Hyacinths are toxic to dogs, cats and horses: intense vomiting and diarrhoea (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Hyacinth in nearby cities

Around Milwaukee, Madison is 5 days earlier and Traverse City 8 days later.

CityDistanceDateDifference
Madison121 km27 September – 20 November5 days earlier
Rockford128 km28 September – 25 November4 days earlier
Chicago131 km7 October – 3 December5 days later
Green Bay165 km30 September – 17 November2 days earlier
Grand Rapids182 km4 October – 29 November2 days later
Traverse City266 km10 October – 26 November8 days later

Where to buy hyacinth for planting in Milwaukee

Planting stock goes into the ground from 2 October to about 25 November; buy it before that. Within 15 km of Milwaukee OpenStreetMap lists 9 garden centres, 10 markets and 1 farm shop (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Milwaukee?

In Milwaukee, hyacinth: plant from 2 October to about 25 November. 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 Milwaukee?

Last spring frost around 27 April, first autumn frost around 1 November.

Other crops in Milwaukee, with their dates