Imagine you have a factory producing sandwiches for supermarkets and petrol stations etc. Maybe you’re producing 100,000 packs a day or even more. Now imagine the worst thing that could happen. Perhaps someone comes in to work with food poisoning and contaminates the product and 100,000 people come down with food poisoning. Read more …

Your tunnel or greenhouse is likely to get a little bit out of hand during this month, with most crops not being at their prime any longer. Pests and diseases are also spreading much faster than before. You have to decide which plants to clear and which ones to leave a bit longer. Read more …

September is the end of summer although we’re often lucky to have an Indian summer with blue skies and sunshine, nothing is certain with the weather. The bulk of the harvest comes home now and as crops come out the plot begins to empty. Read more …

In August there is even more bounty than in July, whether you’re growing in a polytunnel or a greenhouse. You may have produced enough courgettes and cucumbers for the whole neighbourhood. The tomatoes are made into soups and frozen and you reap the rewards for all your efforts. Read more …

August with a little luck brings us the best of the summer weather but being the traditional holiday month it can be hard to keep on top of the vegetable plot growing with a fortnight away, even if a neighbour can be persuaded to water as required. Read more …

Your polytunnel or greenhouse is absolutely packed and you’ll be harvesting fruits from your summer crops – the first tomato of the year is always the most anticipated and delicious. Soon you’ll have more food than you can cope with. Read more …

July is usually one of the hottest and driest months so a lot of time may be spent watering. You can reduce water loss and so save yourself some time. Mulching with a layer of organic matter will help preserve moisture but may encourage slugs so you will need to take action against them. Read more …

June is one of my favourite months in the tunnel or greenhouse. The majority of crops are planted by now and the responsibility of watering your seedlings every day is nearly over. You can enjoy tending your crops and observe how they develop. Read more …

Flaming June should bring us a hot sunshine-filled month with the risk of frost passed and those in more northerly parts should be able to catch up with those in the south. We’re also moving towards the longest day, June 21st being the summer solstice so there is plenty of daylight to let you get on with things. Here’s my fruit and vegetable growing guide for June. Read more …

May is the most exciting month in your tunnel or greenhouse. This is the time to plant out your summer crops – your tomatoes, peppers, aubergines, cucumbers and basil. Read more …

Generally one of the busiest months on the vegetable plot, here John Harrison shares his fruit and vegetable growing guide for May. The soil is warm and the plants growing well. But watch out for a sneaky late frost. Keep an eye on the weather forecast and be prepared for frantic last minute wrapping of fleece to protect tender plants. Read more …

April is one of the busiest months and one filled with immense responsibility. All your crops are now sown and you care for them as if they are your little babies. Read more …

By April spring should be well and truly underway, the soil warming up nicely and everything growing away. Don’t be complacent though, it’s been known for a cold snap with snow to strike even in the sunny south of England. Read more …

You will really feel the warmth in your greenhouse or polytunnel now and so do your plants. They start to grow quite rapidly now but be aware that the nights are still quite cold and there is still a high risk of frost. Read more …

March is the month when things really start to move in the growing season. In fact the start of the year used to be Lady Day, the Feast of the Annunciation, 25th March until 1752 in Britain when we adopted the Gregorian calendar and started our year on the 1st January. Read more …

In your greenhouse or tunnel you may now be fooled that spring has arrived. Your tunnel or greenhouse can easily warm up to 20˚C during sunny spells. You also notice that the days are getting longer and your gardening itch is starting up again. Read more …

February, being the last of the winter months , often has a sting and ends up being the coldest month. So, more than any other month, this one you need to play according to local conditions. It’s best to hold off than try to sow in waterlogged, near frozen ground that will most likely rot any seeds. Read more …

January can be the beginning of your creative gardening year in your greenhouse or polytunnel. It’s the first awakening of the year. You can start off new seedlings on your propagator and sow and plant the first vegetables into the ground. Read more …

January is generally a very cold month with hard frosts freezing the ground although there are no guarantees with British weather. Looking through my diaries, snow isn’t that likely for a prolonged period, but you never know. Read more …

It’s a good time to take a break from your tunnel or greenhouse. All you need to do is harvest your salads and ventilate as much as possible. If you have spare time you can prepare the beds for the following year. Read more …