When to plant zucchini in St. John's: 14 July – 24 August

In St. John's, zucchini: sow for seedlings from 2 June to 3 August; plant into a greenhouse from 23 June to 24 August; plant out into open ground from 14 July to 24 August.

Zucchini in St. John's: soil, season and weather

In St. John's the soil, not frost, sets the date: the last frost is over around 19 May, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 14 July, 56 days later.

Last spring frost	19 May
Top 7 cm of soil at 18 °C	14 July, 56 days after the last frost
First autumn frost	10 November, 119 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	19 August – 29 September
Days left for picking	83
Daylight	15:59 on 23 June, 15:39 on 14 July
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 12 rainy days

The same dates in St. John's hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in St. John's: care after planting

Planted on 14 July: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in St. John's during the zucchini season

About 578 mm of rain falls in the season; August is the driest month (93 mm) and November the wettest (179 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	19.7	12.9	98	12	15:37
August	20.3	13.9	93	12	14:19
September	16.6	10.8	111	11	12:38
October	11.6	6.3	97	12	10:56
November	7.2	1.8	179	15	9:20

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

All the nearest cities on our list plant zucchini earlier than St. John's; the closest date is in Halifax, 11 days earlier.

City	Distance	Date	Difference
Charlottetown	805 km	27 June – 16 August	17 days earlier
Halifax	897 km	3 July – 23 August	11 days earlier
Moncton	933 km	26 June – 18 August	18 days earlier
Fredericton	1,077 km	28 June – 11 August	16 days earlier
Bangor	1,268 km	25 June – 17 August	19 days earlier
Augusta	1,365 km	22 June – 17 August	22 days earlier

Where to buy zucchini plants and seeds near St. John's

Buy plants ready to set out from 14 July to 24 August (from 23 June to 24 August for an unheated greenhouse); seed for raising your own is sown from 2 June to 3 August. Within 15 km of St. John's OpenStreetMap lists 3 garden centres and 2 markets (collected 20 October 2026).

St. John's Farmer's Market — market
Freshwater Road 245, St. John's · 2 km
Lester's Farm Market — market
"seasonal" · 7 km
Carew's Landscaping — garden centre
10 km
Traverse Gardens — garden centre
13 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions