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Guy's news: summer rain & sleepy potatoes

The August rains which ruined many a holiday have got our winter cabbages, leeks, kales, romanesco and calabrese broccoli off to a good start. The prospects for the later winter crops look even better as the slow drop in temperature prepares them for the first frost that typically arrives in early October. Meanwhile, when weather conditions allow, our farming co-op are busy harvesting main crop potatoes and getting them into store. The plants have been defoliated, either naturally through blight attacking the leaves, or through mowing the tops off followed by burning to prevent blight hitting; now we wait three weeks for the tubers to set a firm skin and for any blight spores on the surface to die before harvesting into one ton wooden bins. Few things smell worse than a potato store melting to slime with blight, so it is worth being patient. Initially the store is ventilated with ambient air to dry the tubers and allow any skin damage caused by the harvesting machinery to heal. After two or three weeks the fridges are switched on to bring the temperature down to 3.5°C over a month or so, and thus put the tubers to sleep. Valor, the sleepiest variety, will happily slumber on until next May or even June.

Those August rains were a mixed blessing; good for recently planted hardy winter crops needing to get established, less good for tender salads. Our spinach succumbed first to mildew brought on by the damp and evolution (new mildew strains have overcome the resistance bred into existing varieties), and then to nitrogen deficiency resulting from soluble nutrients being carried down through the soil profile by the rain; spinach is too shallow rooted and quick maturing to reach them. Later sowings are now recovering to some extent but you may have noticed your box greens tending more towards kale and cabbage as we look for substitutes for failing spinach. We are also struggling with a flush of the small leaved, succulent chickweed; it is often a problem in the autumn, establishing an interwoven mat which smothers out all but the most vigorous competition. Sorting the weeds from the crop is slowing the picking of salad leaves and spinach, yet chickweed is much prized in some parts of the world so I hope you will not be too indignant if a few harmless leaves make it through to your bags.

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    Guy Singh-Watson

    Self-confessed veg nerd, Guy Singh-Watson has over the last 30 years taken Riverford from one man and a wheelbarrow delivering homegrown organic veg to friends, to a national veg box scheme delivering to around 50,000 customers a week. Guy is an inspirational, passionate, opinionated and admired figure in the world of organic farming, who still spends more time in the fields than in the boardroom. Twice awarded BBC Radio 4 Farmer of the Year, Guy is passionate about sharing with others the organic farming and business knowledge he has accumulated over the last three decades. His video rants have provided a powerful platform to do this, with a video on pesticides going viral on Facebook to reach 5.6 million views and 91,000 shares. His weekly veg box newsletters connect customers to the farm with refreshingly honest accounts of the trials and tribulations of producing organic food, and the occasional rant about farming, ethical and business issues he feels strongly about.  

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