You can grow almost anything in a Polytunnel and planning is very important. From this handy chart – taken from “How to Grow Food in Your Polytunnel All Year Round” you can work out the best time to start sowing and growing and help determine when different plants and ready for harvest.
Seasonal Crop Planner
| Crop | Sow | Harvest |
| Aubergine | Feb-March | June-Nov |
| Broad Beans | Oct-Feb | May-June |
| French Beans | April | June-Nov |
| Beetroot | July-Aug | Oct-March |
| Broccoli, Sprouting | March-May & Aug Sept | March-July |
| Cabbage | Feb-Nov | All Year |
| Carrot | Feb-Aug | All Year |
| Cauliflower | Feb-Sept | All Year |
| Celeric | Feb-March | Sept-April |
| Celery | Feb-March | June-April |
| Chard Swiss/rainbow | Feb-April | All Year |
| Coriander | All Year | All Year |
| Courgette | April-May | June-Nov |
| Cucumber | April-May | June-Nov |
| Fennel | March-July | July-Dec |
| Garlic | Feb & Nov | June |
| Kohl rabi | Feb-Oct | All Year |
| Lettuce | Feb-Sept | All Year |
| Melon | April-May | Aug-Sept |
| Onion, bulb | July-Aug | May-July |
| Onion, spring | Feb-Oct | All Year |
| Pak choi | Jan & June-Aug | Sept-March & May-July |
| Peas | Jan-Feb & Aug-Sept | Apr-June |
| Pepper | Feb | July-Dec |
| Potato | Feb & Sept | April-Dec |
| Radish | Feb-Oct | All Year |
| Rocket | Feb-Sept | All Year |
| Spinach | Feb-May & Aug-Sept | All Year |
| Strawberry | Feb-April & July-Sept | Feb-Nov |
| Sweetcorn | April-May | July-Spet |
| Sweet Potato | Feb & Aug | Sept-Oct |
| Tomato | Feb-March | June-Nov |
| Turnip | Feb & July-Aug | Nov-May |
Produced exclusively for First Tunnels by Andy McKee and Mark Gatter – the best-selling authors of ‘How to grow food in your Polytunnel’ and ‘The Polytunnel Handbook’. See First Tunnels website for FREE downloadable Growing Guides which will take you through a whole 12 months of activity in your polytunnel. What you should be doing, what to look out for, maintenance and ideas to maximise your crops, PLUS… what to plant, pick and enjoy!
About the Author: Sean Barker
Sean Barker is the Managing Director of First Tunnels and a passionate advocate for sustainable gardening. With over 30 years of experience in the gardening industry, Sean has dedicated himself to helping gardeners across the UK maximise their growing potential through the effective use of polytunnels. His blog offers a wealth of practical tips, expert advice, and innovative solutions for maintaining and optimising polytunnels, ensuring gardeners can enjoy bountiful harvests all year round. Sean can often be found experimenting with new growing techniques in his own polytunnel, always eager to share his findings with fellow enthusiasts.
