Atlantic Canada has a longer frost-free season than most of the country and less warmth to show for it: springs are late, summers are cool and humid, and the sea sends fog over the plants exactly when they are flowering. Growers here win with mould-resistant genetics and early finishes. This guide is written for Halifax, Moncton, Saint John, Charlottetown and St. John’s.
Nova Scotia (19+). Up to four plants per household at your residence. Landlords may restrict growing in a lease; keep plants secure and out of public view.
New Brunswick (19+). Up to four plants per household. Outdoors they must be behind a locked enclosure at least 1.52 metres high; indoors they must be in a separate, locked space. Landlords may restrict growing.
Prince Edward Island (19+). Up to four plants per household, kept in a secure location that is not accessible to minors and not visible from public places.
Newfoundland and Labrador (19+). Up to four plants per household at your residence. Landlords may prohibit growing.
Under the Cannabis Act one seed counts as one gram of dried cannabis for possession limits, so 30 seeds is the public possession limit. Provincial law expects seeds for growing to come from the provincial retailer (NSLC, Cannabis NB, PEI Cannabis, NLC) or a licensed store; The Seed Pharm sells seeds as collectable genetics, and you are responsible for the law where you live.
Orders leave our Vancouver operation by Canada Post in plain packaging with nothing on the outside indicating the contents. Delivery to the Maritimes typically takes 3–5 business days, Newfoundland and Labrador 4–7. Shipping is free on orders over $99; Interac e-Transfer, Visa and Mastercard are accepted. If nothing arrives within 30 days we resend once, free.
Halifax has roughly 160 frost-free days — more than Toronto — but a July in Halifax is four or five degrees cooler than a July in Toronto, and the difference in growing energy over a season is large. Plants grow more slowly, flower later and take longer to ripen. The Maritime grower’s calendar is therefore about finishing before two things arrive: the fog and cool nights of late September, and the remnants of Atlantic hurricanes that push through in September and early October with days of rain and wind.
Fog is the specific enemy. Saint John, Halifax’s south shore and the Avalon Peninsula spend a lot of the year in it, and a dense cola that stays wet through a foggy morning will rot. Two rules follow: choose strains with open, airy flowers or a quick finish, and give plants a spot that gets morning sun early to dry them off. A south-facing wall that holds heat overnight is worth a full hardiness zone here.
Autoflowers are the easy answer for most of the region — out in early June, harvested in mid-August, before the fog season. Fast photoperiod strains work in the warmer inland spots (Fredericton, the Annapolis Valley, Kentville) if they are out by the end of May.
Dates for Halifax and Moncton. Fredericton and the Annapolis Valley run a week earlier in spring and warmer through summer; St. John’s runs two to three weeks later in spring.
| Stage | Autoflowers (recommended) | Photoperiod plants |
|---|---|---|
| Start indoors | Late April – May | Mid-April |
| Move outside | Early June; second run late June | Late May – early June |
| Vegetative growth | First 3–4 weeks | June – mid-August |
| Flowering | Weeks 4–10 from seed | Mid-August – early October |
| Harvest | Late July – early September | Late September – early October |
| Peak risk | A late-June start meeting September fog | Fog, rain and post-tropical storms from mid-September |
Zone 6a to 6b, last frost around May 10, first frost around October 20. The season is long but cool, and the harbour sends fog inland on most summer mornings. Halifax growers do best with a sunny, sheltered south-facing spot — the peninsula’s back gardens and the warmer inland suburbs like Bedford and Sackville — and with genetics that either finish by early September or shed water. Autoflowers out in the first week of June are harvested in mid-August; a fast photoperiod strain out in late May is cut in the last days of September, just ahead of the storm season.
Sheltered by the North and South Mountains, the Valley is Nova Scotia’s farm belt and its best outdoor cannabis climate: warmer, drier and sunnier than the coast, with a last frost in mid-May and a first frost around October 10. Nine-week photoperiod strains finish here, and the harvest is usually the biggest in the province.
A late spring — frost into the last week of May — and a wet, windy autumn. Zone 5b to 6a. Autoflowers started indoors in May and moved out in early June are the sensible plan; harvest by the end of August.
Inland enough to have real summer heat, Moncton is zone 5b with a last frost around May 20 and a first frost in the first days of October. Humidity in August and September is high, so airy strains and early finishes still apply. Remember New Brunswick’s rule: outdoor plants must be behind a locked enclosure at least 1.52 metres high.
The foggiest city in the region, cooled all summer by the Bay of Fundy. Last frost around May 15, first frost around October 15, and rarely a truly hot day. Dense indica colas rot here; sativa-leaning autoflowers with spaced flowers finish clean. A spot that gets sun from early morning, to dry the plants, is worth more than anything else you can do.
The warmest summers in Atlantic Canada, and the earliest frost — around September 28. Zone 5a to 5b, last frost around May 20. Plants grow fast in the July heat, so eight-week photoperiod strains put out in late May can finish by late September; autoflowers are safer.
The Gulf of St. Lawrence delays the Island’s spring — last frost around May 22 — and then holds the autumn mild, with the first frost around October 18. Humidity is high all summer. Zone 5b to 6a. Autoflowers out in early June are the reliable crop; a fast photoperiod strain has time in a sunny, sheltered garden. PEI requires plants to be secure, out of reach of minors and out of public view.
St. John’s has 130-odd frost-free days on paper, from about June 2 to mid-October, but the coolest, windiest and foggiest summer of any Canadian capital. Growth is slow and flowers ripen late. Outdoor success depends entirely on shelter: a sunny wall out of the wind, a greenhouse or a cold frame. Most growers on the Avalon grow indoors or run a short autoflower in a sheltered spot from mid-June to early September. Inland Newfoundland — Gander, Grand Falls-Windsor — is warmer in summer but has a shorter season at both ends.
Chosen for fog and cool nights — open flowers, early finishes and cold tolerance.
The fog pick — spaced flowers that shed water
Out in early June, harvested in early August, and built so that damp air moves through the flowers rather than sitting in them.
The Maritime all-rounder
Balanced, forgiving and finished by mid-August from a June start — before the humidity and the storms.
The early photoperiod that shrugs off cool nights
One of the earliest-finishing photoperiod strains we carry and famously tolerant of cool weather. Keep it in a sunny, airy spot and harvest before the October rain.
Yes. Adults 19 and over may grow up to four plants per household at their residence. Landlords may restrict growing in a lease. Seeds are sold as collectable genetics; you are responsible for complying with the law.
Adults 19 and over may grow up to four plants. Outdoors the plants must be behind a locked enclosure at least 1.52 metres high; indoors they must be kept in a separate, locked space. Landlords may restrict growing.
Yes, in both provinces, at 19 and over, up to four plants per household. PEI requires plants to be secure, inaccessible to minors and out of public view; in Newfoundland and Labrador landlords may prohibit growing.
Around May 10–15 in Halifax and Saint John, May 20 in Moncton and Fredericton, May 22–25 in Charlottetown and Cape Breton, and the first week of June in St. John’s. Many growers wait an extra week and keep a frost cloth handy.
Fog, dew and cool nights keep dense flowers wet for hours at a time, and botrytis moves through a wet cola in about two days. Choose airy strains or autoflowers that finish in August, give plants early-morning sun, and harvest before the September storm season.
Typically 3–5 business days to Nova Scotia, New Brunswick and PEI, and 4–7 to Newfoundland and Labrador, by Canada Post in plain packaging. Orders over $99 ship free, and if nothing arrives within 30 days we resend once at no charge.
Seeds are sold as collectable genetics. Cultivation is regulated by the Cannabis Act and provincial law; grow only where you are legally permitted to, and check your lease. Frost dates are long-term averages and vary year to year. Buyers must be 19 or over.
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