Sow now › USDA zone 4 › September

Sow in September

Blackberry

Sow April to September

Blueberry (Northern Highbush)

Sow April to September

Blueberry (Rabbiteye)

Sow April to September

Cranberry

Sow April to September

Elderberry

Sow April to September

Garlic

Sow September to October

Gooseberry

Sow April to September

Raspberry (Red)

Sow April to September

Raspberry (Yellow/Gold)

Sow April to September

Strawberry

Sow April to September · 1 in the club sowing now

Plant out in September

Sown earlier under cover, hardened off, and going in the ground once the last frost has passed.

Arugula

Harvest May to September

Bok Choy

Harvest June to October

Broccoli

Harvest June to October · 2 in the club sowing now

Cabbage

Harvest June to October

Cauliflower

Harvest June to October · 2 in the club sowing now

Cilantro

Harvest June to September

Collard Greens

Harvest June to October

Endive & Escarole

Harvest July to September

Fennel

Harvest July to September

Kale

Harvest June to October · 3 in the club sowing now

Kohlrabi

Harvest June to September

Lettuce

Harvest May to September · 3 in the club sowing now

Mustard Greens

Harvest June to September · 2 in the club sowing now

Napa Cabbage

Harvest July to October

Pea

Harvest June to October

Radish

Harvest May to September · 1 in the club sowing now

Scallion

Harvest June to October

Spinach

Harvest June to October · 2 in the club sowing now

Turnip

Harvest June to October · 3 in the club sowing now

Ready to pick in September

Acorn Squash (Pumpkin)

Harvest August to November

Apple

Harvest August to March

Apricot

Harvest July to September

Arugula

Harvest May to September

Asian Pear

Harvest August to September

Basil

Harvest July to September

Beetroot

Harvest June to September · 1 in the club sowing now

Blue Potato

Harvest August to September

Bok Choy

Harvest June to October

Broccoli

Harvest June to October · 2 in the club sowing now

Brussels Sprouts

Harvest September to October

Bulb Onion

Harvest July to September

Butternut Squash (Pumpkin)

Harvest August to November

Cabbage

Harvest June to October

Cantaloupe

Harvest July to September

Carrot

Harvest June to September · 5 in the club sowing now

Cauliflower

Harvest June to October · 2 in the club sowing now

Celeriac

Harvest August to October

Celery

Harvest July to September

Cherry (Sour)

Harvest August to September

Cherry (Sweet)

Harvest July to September

Chives

Harvest June to September · 1 in the club sowing now

Cilantro

Harvest June to September

Collard Greens

Harvest June to October

Cucumber

Harvest July to September · 1 in the club sowing now

Edamame

Harvest August to September

Eggplant

Harvest July to September

Endive & Escarole

Harvest July to September

Fennel

Harvest July to September

Fig

Harvest July to September

Fingerling Potato

Harvest August to September

Giant Pumpkin (Squash)

Harvest August to November

Grape (Table)

Harvest August to September

Grape (Wine)

Harvest August to September

Hot Chilli

Harvest July to October

Hubbard Squash (Pumpkin)

Harvest August to November

Jack-O'-Lantern Pumpkin (Squash)

Harvest August to November

Kale

Harvest June to October · 3 in the club sowing now

Kiwi (Fuzzy)

Harvest August to September

Kiwi (Hardy Kiwiberry)

Harvest August to September

Kohlrabi

Harvest June to September

Leek

Harvest August to October · 3 in the club sowing now

Lettuce

Harvest May to September · 3 in the club sowing now

Medium Chilli

Harvest June to September

Mild Chilli

Harvest June to September

Mulberry

Harvest August to September

Mustard Greens

Harvest June to September · 2 in the club sowing now

Napa Cabbage

Harvest July to October

Nectarine

Harvest July to September

Okra

Harvest July to September

Oregano

Harvest June to September

Ornamental Pumpkin (Squash)

Harvest August to November

Parsley

Harvest June to September

Parsnip

Harvest August to October · 1 in the club sowing now

Passionfruit

Harvest August to September

Pawpaw

Harvest August to September

Pea

Harvest June to October

Peach

Harvest July to September

Pear

Harvest August to February

Pie Pumpkin (Squash)

Harvest August to November

Plum (European)

Harvest July to September

Plum (Japanese)

Harvest July to September

Pomegranate

Harvest July to September

Quince

Harvest August to September

Radicchio

Harvest August to October

Radish

Harvest May to September · 1 in the club sowing now

Rosemary

Harvest June to September

Russet Baking Potato

Harvest August to September

Rutabaga

Harvest September to October

Sage

Harvest June to September

Scallion

Harvest June to October

Snap Bean

Harvest July to September

Specialty Chilli

Harvest July to October

Spinach

Harvest June to October · 2 in the club sowing now

Storage Potato

Harvest September to October

Summer Squash (Pumpkin)

Harvest August to November

Super Hot Chilli

Harvest August to October

Sweet Bell Pepper

Harvest July to September

Sweet Corn

Harvest July to September

Sweet Potato

Harvest September to October

Swiss Chard

Harvest June to September

Thyme

Harvest June to September

Tomatillo

Harvest July to September

Turnip

Harvest June to October · 3 in the club sowing now

Watermelon

Harvest August to September

Zucchini (Courgette)

Harvest August to November

Questions people ask

What can I sow in September in USDA zone 4?

10 crops go in this month in USDA zone 4: Blackberry, Blueberry (Northern Highbush), Blueberry (Rabbiteye), Cranberry, Elderberry, Garlic, Gooseberry, Raspberry (Red) and more.

When is the last frost in USDA zone 4?

Typically around 1 May, with the first autumn frost about 1 October. Treat those as averages and watch the forecast; a cold spring can push them back a fortnight.

What's ready to harvest in September in USDA zone 4?

Acorn Squash (Pumpkin), Apple, Apricot, Arugula, Asian Pear, Basil, Beetroot, Blue Potato and more.

Tony C Smith

Allotment keeper in the North East of England, the voice behind the Tony C Smith YouTube channel, and the gardener who built GrowMore CookMore. Club numbers on this page update as members log their plots. Last updated 4 September 2026.