Fall · September 8, 2026

Charlottetown, Prince Edward Island

Acadian Forest & Atlantic Coast·Hardiness zone 6b

Now

12°C · Partly cloudy

Today

15° / 10°

Soil 6 cm

14°C

First frost

~54 days (Nov 1)

Gardening in Charlottetown

AI field guide · refreshed weekly

Charlottetown Gardening: Early September – Harvest, Plant Cool-Season Crops, Prepare for First Frost

You're in zone 6b with 54 days until the average first frost (November 1). Soil at 14°C is cool but workable for fall planting. Spring frost averaged May 8, giving you a 177-day growing season. Nights are already dipping to 10°C; frost-sensitive annuals and warm-season crops are on borrowed time. Focus on cool-season brassicas, root crops, and leafy greens that thrive in PEI's short, crisp autumn.

Sow outdoors now

  • Spinach (Bloomsdale, Space or Tyee)

    Direct seed now for fall harvest before frost; germinates well in 14°C soil and matures in 40–50 days. Space 10 cm (4 in) apart.

  • Arugula (Roquette)

    Fast-growing (30 days), cold-hardy, and flavour improves after light frost. Sow every 2 weeks through mid-September for continuous harvest.

  • Radish (Cherry Belle, French Breakfast)

    Matures in 25–30 days even in cool soil; excellent for quick succession planting. Thin to 5 cm (2 in) spacing.

  • Kale (Lacinato, Winterbor)

    Extremely cold-hardy; flavour sweetens after frost. Sow now for November–December harvest; thin to 30 cm (12 in) apart.

  • Mâche (Corn Salad)

    Frost-tolerant, slow-growing salad green; sow now for winter harvesting under row cover. Germinates reliably in cool soil.

Start indoors now

  • Cabbage transplants (Savoy, Red Acre)

    Start indoors now for transplanting in 3–4 weeks; fall cabbage matures before hard frost if planted by late September. Use 6-cell packs.

  • Broccoli (Calabrese, Arcadia)

    Sow indoors for transplanting by late September; fall crop often sweeter and less prone to bolting than spring. Keep seedlings at 15–18°C.

  • Cauliflower (Snowball, Cheddar)

    Start now for transplanting in 3 weeks; fall cauliflower is reliable in PEI if planted before frost. Needs consistent moisture.

Harvest now

  • Tomatoes (all types)

    Pick all remaining fruit before first frost (54 days away); green tomatoes ripen indoors in 2–3 weeks at room temperature. Harvest before temperatures drop below 10°C at night.

  • Beans (bush and pole)

    Frost will kill plants within days; harvest all pods now, including immature ones for eating fresh or freezing.

  • Peppers (sweet and hot)

    Frost-sensitive; pick all fruit now. Green peppers will not ripen further indoors but can be used fresh or cooked.

  • Squash and Pumpkins

    Harvest when skin hardens and stems brown; cure in a warm, dry place for 1–2 weeks before storage. Leave 5 cm (2 in) of stem attached.

Tasks this week

  • Pull spent summer crops (lettuce, peas, early beans) to make room and reduce pest habitat; compost disease-free material.
  • Mulch root crops (carrots, beets, parsnips) with 5 cm (2 in) of straw or leaves to extend harvest into November and protect from frost heave.
  • Stake or support fall brassicas (broccoli, cabbage) if wind gusts reach 43 km/h (forecast Wed 10th); PEI's coastal winds can topple young transplants.
  • Water newly seeded beds and transplants deeply; cool soil dries slowly, but inconsistent moisture causes bolting and poor germination.
  • Scout for cabbage moths, flea beetles, and aphids on brassicas; use row cover or neem oil before populations explode in cool, damp conditions.

Watch out for

  • First frost is 54 days away (early November); any warm-season crop still in ground will be killed. Prioritize harvest of tomatoes, peppers, beans, and squash now.
  • Soil temperature at 14°C is ideal for cool-season seeds but too cool for warm-season germination; do not sow beans, squash, or cucumber.
  • Wind to 43 km/h forecast Wednesday (10th); young transplants and tall crops (kale, broccoli) may need staking or windbreaks.

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