Sow now › Portsmouth (PO) › September
What to sow in September
in Portsmouth (PO)
7 crops can go in this month. Typical last frost PO: about 1 May. First autumn frost about 30 October.
Sow in September
Blueberry
Sow March to October · 1 in the club sowing now
Coriander
Sow March to September · 2 in the club sowing now
Mustard Greens
Sow March to September · 2 in the club sowing now
Radish
Sow March to September · 1 in the club sowing now
Rocket
Sow March to September · 1 in the club sowing now
Spinach
Sow March to September · 2 in the club sowing now
Strawberry
Sow March 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.
Brussels Sprouts
Harvest October to February
Cabbage (Spring)
Harvest March to May · 6 in the club sowing now
Cabbage (Winter)
Harvest November to March · 2 in the club sowing now
Celeriac
Harvest October to December
Kiwi (Hardy)
Harvest October to November
Leek
Harvest October to February · 3 in the club sowing now
Lettuce (Butterhead)
Harvest May to October
Mizuna
Harvest May to October · 1 in the club sowing now
Pak Choi
Harvest May to October · 2 in the club sowing now
Parsnip
Harvest October to January · 1 in the club sowing now
Swede (Rutabaga)
Harvest October to February · 1 in the club sowing now
Turnip
Harvest May to November · 3 in the club sowing now
Ready to pick in September
Apple
Harvest August to March
Aubergine
Harvest July to September
Basil
Harvest July to September
Beetroot
Harvest June to October · 1 in the club sowing now
Blackberry
Harvest August to October
Blueberry
Harvest July to September · 1 in the club sowing now
Broccoli
Harvest July to November · 2 in the club sowing now
Cabbage (Red)
Harvest August to November
Calabrese
Harvest June to October
Carrot
Harvest June to November · 5 in the club sowing now
Cauliflower
Harvest June to October · 2 in the club sowing now
Celery
Harvest August to November
Chard (Swiss Chard)
Harvest July to November · 1 in the club sowing now
Chilli Pepper (Hot)
Harvest July to October · 1 in the club sowing now
Chilli Pepper (Medium)
Harvest July to October · 1 in the club sowing now
Chilli Pepper (Mild)
Harvest July to October · 1 in the club sowing now
Chilli Pepper (Super Hot)
Harvest August to October
Chives
Harvest June to September · 1 in the club sowing now
Courgette
Harvest July to October
Cucumber
Harvest July to October · 1 in the club sowing now
Cucumber (Greenhouse)
Harvest June to October
Dill
Harvest June to September
fennel bulb
Harvest August to October
Fig
Harvest August to October
French Beans
Harvest July to October
Grape (Greenhouse)
Harvest August to October
Grape (Outdoor)
Harvest September to October
Kale
Harvest September to March · 3 in the club sowing now
Kohlrabi
Harvest June to October
Lettuce
Harvest May to October · 3 in the club sowing now
Lettuce (Butterhead)
Harvest May to October
Lettuce (Cos/Romaine)
Harvest June to October
Melon
Harvest August to September
Mizuna
Harvest May to October · 1 in the club sowing now
Mustard Greens
Harvest May to November · 2 in the club sowing now
Onion (Bulb)
Harvest July to September · 3 in the club sowing now
Onion (Salad/Spring)
Harvest May to October · 4 in the club sowing now
Oregano
Harvest July to September
Pak Choi
Harvest May to October · 2 in the club sowing now
Parsley
Harvest June to October
Pear
Harvest September to December
Peas (Garden)
Harvest June to September
Peas (Mangetout)
Harvest June to September
Peas (Sugar Snap)
Harvest June to September
Plum
Harvest August to September
Potato
Harvest June to October · 1 in the club sowing now
Radish
Harvest April to October · 1 in the club sowing now
Raspberry (Autumn Fruiting)
Harvest August to October
Rocket
Harvest April to October · 1 in the club sowing now
Rosemary
Harvest June to September
Runner Beans
Harvest July to October · 1 in the club sowing now
Sage
Harvest June to September
Spinach
Harvest May to November · 2 in the club sowing now
Squash & Pumpkin
Harvest August to October · 1 in the club sowing now
Strawberry
Harvest June to September · 1 in the club sowing now
Sweet Pepper
Harvest July to October
Sweetcorn
Harvest August to October
Thyme
Harvest June to September
Tomato (Beefsteak)
Harvest July to October · 1 in the club sowing now
Tomato (Cherry)
Harvest July to October · 1 in the club sowing now
Tomato (Plum)
Harvest July to October · 1 in the club sowing now
Tomato (Specialty)
Harvest July to October
Tomato (Standard)
Harvest July to October · 1 in the club sowing now
Turnip
Harvest May to November · 3 in the club sowing now
Watercress
Harvest June to October
Watermelon
Harvest August to September
Coming up in October
Broad Beans, Garlic. See the October page.
A nudge on the first of the monthOne email a month with what to sow in Portsmouth (PO), from the newsletter. Nothing else.
Remind me monthlyYour postcode
Type the first half of your postcode (NE12, SW1A) and you'll get the page for your area. Or a US ZIP and you'll get your zone.
Questions people ask
What can I sow in September in Portsmouth (PO)?
7 crops go in this month in Portsmouth (PO): Blueberry, Coriander, Mustard Greens, Radish, Rocket, Spinach, Strawberry.
When is the last frost in Portsmouth (PO)?
Typically around 1 May, with the first autumn frost about 30 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 Portsmouth (PO)?
Apple, Aubergine, Basil, Beetroot, Blackberry, Blueberry, Broccoli, Cabbage (Red) and more.
Plan the plot, track every sowing, cook the harvest
Sowing reminders and harvest forecasts for your own frost dates, the Seed Tin, Scan Centre for any label or packet, and the Potty Mouth Garden Club. Free to start.
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.