When to plant hyacinths in Bayonne: by 17 November

In Bayonne, hyacinth: plant by 17 November. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Gamm Vert (garden centre, 6 km); addresses and opening hours are below.

Hyacinth in Bayonne: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 5.1 °C.

Planting	by 17 November
First autumn frost	17 December
Coldest nights	January, 5.1 °C
Soil back at 1 °C in spring	already in the first week of January
Daylight	9:38 on 17 November
Daylight at the winter solstice	8:57

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

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

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS).

In Bayonne the average daily temperature stays at 10 °C or lower for about 8 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. That is less than the bulbs need, and without more cold they may not flower properly. Where winters are not cold enough for long enough, LSU AgCenter keeps tulip and hyacinth bulbs in the refrigerator for at least six to eight weeks before planting, and plants them only once the soil has cooled: warm soil can cancel the chilling. Keep fruit out of that refrigerator — ripening fruit gives off ethylene, which harms the flowers (Wisconsin Horticulture Extension).

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, LSU AgCenter, ASPCA.

Hyacinth in nearby cities

Around Bayonne, Jaca is 47 days earlier and Bilbao 9 days later.

City	Distance	Date	Difference
San Sebastián	45 km	by 3 November	14 days earlier
Pamplona	77 km	31 October – end of December	17 days earlier
Pau	92 km	by 4 November	13 days earlier
Vitoria-Gasteiz	121 km	25 October – end of December	23 days earlier
Bilbao	121 km	by 26 November	9 days later
Jaca	129 km	1 October – end of December	47 days earlier

Where to buy hyacinth for planting in Bayonne

Planting stock goes into the ground by 17 November; buy it before that. Within 15 km of Bayonne OpenStreetMap lists 13 garden centres, 1 farm-supply shop, 20 markets and 34 farm shops (collected 27 October 2026).

Gamm Vert — garden centre
Mon–Sat 09:00–12:00, Mon–Sat 14:00–18:30 · 6 km
Halle de Biarritz — market
Mon–Sun 07:30–14:00 · 8 km · halles-biarritz.fr
Halles provisoires — market
Mon–Thu 07:30–13:30; Fri–Sun, public holidays 07:30–14:30 · 0 km
Marché producteurs locaux du Boucau — market
Place Gabriel Péri, Boucau · Sat 07:00–14:30 · 4 km
Marché de Tarnos — market
Place Alexandre Viro, 40220 Tarnos · Tue 08:00–13:00 · 6 km
Marché de Ondres — market
Place Richard Feuillet, 40440 Ondres · Sun 08:00–13:00 · 8 km
Marché de Saint-Martin-de-Seignanx — market
Place Jean Rameau, 40390 Saint-Martin-de-Seignanx · Sat 08:00–13:00 · 9 km
Marché saisonnier - Labenne Océan — market
Route Océane, 40530 Labenne · Jul–Aug Fri 08:00–13:00 · 12 km

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