Now
19°C · Clear
Today
20° / 13°
Soil 6 cm
18°C
First frost
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Gardening in Vancouver
AI field guide · refreshed weeklyVancouver Gardening: Early September — Sow Cool-Season Crops, Harvest Summer's End
You're in zone 8a with 66 days until the average first frost (Nov 13). Soil at 18°C is ideal for fall crops—cool enough to prevent bolting, warm enough for germination. Spring frost risk is behind you (163 days since Mar 29), so focus entirely on extending the season downward rather than rushing spring plantings.
Sow outdoors now
Spinach (Spinacia oleracea)
Sow 'Space' or 'Bloomsdale Long Standing' directly now; germinates in 7–10 days at 18°C soil and matures in 40–50 days before hard frost.
Arugula (Eruca vesicana)
Direct sow 'Roquette' or 'Wild Rocket'; ready to pick in 30–40 days, tolerates light frost and improves in flavour after a chill.
Mâche (Valerianella locusta)
Sow 'Verte de Cambrai' now for a winter crop; germinates slowly in cool soil but thrives under Vancouver's grey skies and survives hard frost.
Radish (Raphanus sativus)
Plant 'Watermelon' or 'French Breakfast' for a quick 25–30 day harvest; succession-sow every 10 days through mid-September.
Pea (Pisum sativum)
Sow 'Oregon Sugar Pod' or 'Cascadia' snow peas now; they germinate in cool soil and flower as days shorten, producing through October.
Start indoors now
Brassica seedlings (cabbage, kale, broccoli)
Start 'Lacinato' kale, 'Winterbor' kale, or 'January King' cabbage indoors now for transplant in 4–5 weeks; they'll establish before hard frost and overwinter productively.
Garlic (Allium sativum)
Break apart bulbs and soak cloves in water overnight, then pot individually in seed trays; transplant outdoors in late October when soil cools below 15°C to prevent premature sprouting.
Microgreens (fast crops)
Start trays of radish, mustard, or broccoli microgreens indoors on a sunny windowsill; harvest in 10–14 days as a bridge crop while outdoor beds transition.
Harvest now
Tomatoes (Solanum lycopersicum)
Pick all fruit—ripe or mature green—before the first frost; ripen green ones indoors on a shelf or in a paper bag with an apple.
Beans (Phaseolus vulgaris)
Harvest runner and bush beans regularly to encourage continued production; frost will kill plants within days, so pick everything now.
Squash and pumpkins (Cucurbita spp.)
Cut mature fruit with 5 cm (2 in) of stem attached; cure in a warm, dry place for 10 days before storage to harden the skin.
Herbs (basil, cilantro, parsley)
Cut basil hard before frost kills it; freeze or dry for winter use. Cilantro and parsley will regrow from roots if cut above the crown.
Tasks this week
- Clean up spent summer crops (peas, beans, early lettuce) and add disease-free material to compost; remove any with powdery mildew or rust to the bin.
- Mulch newly planted fall crops with 5 cm (2 in) of compost or aged bark to stabilize soil temperature and retain moisture through dry spells.
- Stake or trellis peas and tall brassicas now before wind (forecast to 24 km/h midweek) flattens them.
- Check soil moisture daily; no rain forecast this week and 18°C soil dries quickly—water seedlings and newly sown beds in the morning.
- Scout for aphids on brassica seedlings and young kale; spray with insecticidal soap if populations spike before transplanting.
Watch out for
- Powdery mildew on squash, pumpkins, and cucumbers: harvest affected fruit immediately and remove foliage to improve air flow; do not compost diseased leaves.
- Slugs and snails thrive in September's cool, humid conditions (86% humidity today): hand-pick at dusk, use copper tape on pots, or lay beer traps in the vegetable beds.
- Early blight on tomatoes: remove lower leaves as plants mature and ensure good air circulation; pick all fruit before frost regardless of ripeness.
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