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When to plant hyacinths in Concord: 1 October – 25 November

In Concord, hyacinth: plant from 1 October to about 25 November. For planting stock, the places nearby include Brochu Nurseries And Landscaping (farm supply, 2 km) and Osborne's Farm and Garden Centers (garden centre, 5 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 Concord: soil, season and weather

Nights then average below 0 °C in December–March; the coldest, January, averages -8.1 °C.

Planting1 October – 25 November
First autumn frost31 October
Coldest nightsJanuary, -8.1 °C
Soil back at 1 °C in spring13 February
Daylight11:46 on 1 October
Daylight at the winter solstice8:59

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

Hyacinth in Concord: 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 Concord the average daily temperature stays at 10 °C or lower for about 27 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 Concord, Montpelier is 14 days earlier and Boston 13 days later.

CityDistanceDateDifference
Manchester (United States)25 km3 October – 27 November2 days later
Boston102 km14 October – 29 December13 days later
Portland, Maine115 km5 October – 26 November4 days later
Montpelier143 km17 September – 11 November14 days earlier
Providence155 km9 October – 30 December8 days later
Augusta187 km4 October – 20 November3 days later

Where to buy hyacinth for planting in Concord

Planting stock goes into the ground from 1 October to about 25 November; buy it before that. Within 15 km of Concord OpenStreetMap lists 3 garden centres, 1 farm-supply shop and 6 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Concord?

In Concord, hyacinth: plant from 1 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 Concord?

Last spring frost around 22 April, first autumn frost around 31 October.

Other crops in Concord, with their dates