When to plant hyacinths in Saguenay: 22 September – 30 October

In Saguenay, hyacinth: plant from 22 September to about 30 October.

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 Saguenay: soil, season and weather

Nights then average below 0 °C in November–April; the coldest, January, averages -16.3 °C.

Planting	22 September – 30 October
First autumn frost	22 October
Coldest nights	January, -16.3 °C
Soil back at 1 °C in spring	7 May
Daylight	12:14 on 22 September
Daylight at the winter solstice	8:19

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

Hyacinth in Saguenay: 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 Saguenay the average daily temperature stays at 10 °C or lower for about 31 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

All the nearest cities on our list plant hyacinth later than Saguenay; the closest date is in Sherbrooke, 5 days later.

City	Distance	Date	Difference
Quebec City	180 km	28 September – 4 November	6 days later
Trois-Rivières	257 km	29 September – 8 November	7 days later
Sherbrooke	343 km	27 September – 8 November	5 days later
Montreal	377 km	2 October – 13 November	10 days later
Fredericton	432 km	28 September – 11 November	6 days later
Augusta	469 km	4 October – 20 November	12 days later

Where to buy hyacinth for planting in Saguenay

Planting stock goes into the ground from 22 September to about 30 October; buy it before that. Within 15 km of Saguenay OpenStreetMap lists 2 markets (collected 20 October 2026).

Halles centrales — market
1 km
Les Halles de la Rivière — market
14 km

Questions