At last the polytunnel is complete, and I have to say it was quite an adventure. I’ve already bored you with the weather we had to put up with in the early stages, so everything from rain constantly flooding the foundations meaning I had to bolt them together underwater – to fierce east winds at minus 6C including wind chill. We had to wait for better weather to put the skin on, and finally got it covered on Monday only for unusual southerly gales to spark up, felling trees, sheds and greenhouses on the site. This morning with the beds dug, the central path constructed and the sliding door hung, I drove in the last screw and we arrived home confident that it would withstand the worst that British weather can offer – at least in the mild and wet south west.
The biggest problem was trying to fit the tunnel on a piece of ground that was almost exactly the same size – the promotional videos showed two skilled workers erecting their demo on a site scraped square, level and true with loads of space all around. But – like the old joke about the viola player who complained that he knew his instrument was out of tune but he just didn’t know which string it was – we knew the plot was out of square but we had no way of knowing which side we could make the reference point. In the end the tunnel could only be built by overlapping the original space by about an inch in a couple of places, but with a bit of calculation over the central path we were able to create almost exactly the same amount of growing space as we had with the previous arrangement of three beds – so we were well pleased with our efforts. The only casualties were the overwintering crop of broad beans that had to be moved and then suffered the severe cold weather. They’re all alive but we shall see the impact of the double setback later on, but meanwhile we’ve got plenty of reserves germinated. The good news is that we can look forward to a whole season of growing in the tunnel.
Lost in translation
As I’ve mentioned I’ve been reading Carol Deppe’s excellent book “The resilient Gardener”; the underlying rationale for which is the need to maximise food production in small gardens in times of scarcity – whether that might be of water; seeds; or just time. Her other books deal with a broader range of crops but this one looks at high calorie crops like potatoes, corn, beans, squash and eggs. I’ve struggled a bit with translating US plant variety names and one or two insect and pest names have had me foxed for a while but it’s absolutely worth the effort because the book is as much about the gardening mindset as it is about the cultivation of these specific crops.
I’m going to write a post about potatoes because they’ve become something of a an ideological and dietary battleground; but I’ll need to do some re-reading of William Cobbett to show how the debate about the potato has been going on since 1824 at the very least. But corn too has become a bit of a bête noir among organic gardeners; tainted by its association with agrobusiness, ethanol and corn syrup. There is so much I didn’t know about corn (maize – another translation issue!), not least that the way we grow it on the allotment (and very occasionally eat it if we can protect it from the badgers) – is to pick it green – underripe. Cornflour, popcorn, and all the other forms of maize come from quite different varieties as does the fodder maize fed to cattle. Flint, dent, flour, popcorn and several hybrid variations all have different genetics. Corn is a rather promiscuous interbreeder which is why if we grow more than one variety we need to keep them a long way from one another. The upside is that it’s possible to deliberately cross open pollinators to create a strain ideal for whatever your purpose, soil or climate is. Phew.
But here’s the point. Here in the UK the system of growing three crops of corn, squash and beans, known as the three sisters, together, has been getting a lot of publicity in the magazines but, interestingly, many allotmenteers report poor results. I’ve always been puzzled at how a five foot stalk of sweetcorn could support a vigorous runner bean while not choking out the squash underneath. It’s one of those things that sounds alright until you think about it. All of them – so long as you grow typically UK veg varieties – ripen at different times. After a good read of Carol Deppe’s book and a bit of online research it seems clear that the way native Americans used the system was by choosing compatible varieties. If you’re an American reader you’ll probably know this already but I’d venture that I’m not alone among British gardeners in my complete ignorance of the complexities of corn growing. For instance you need to be growing all three vegetables over a long season to be harvested at much the same time. Many flint and flour corn varieties are much taller, as much as ten feet; providing a highly efficient central structure. The beans aren’t immature runner beans but drying beans for winter storage, as is the winter squash; all of them growing together and ripening before the first frosts to provide winter stores; high sugar, high protein and high calories. So it seems, the three sisters method would stand a much better chance of success when we choose the three companions really carefully; sowing each at the right time and assembling them so they can grow in harmony to a successful harvest. Flour, beans and dried squash would make a marvellous addition to winter supplies. This is an experiment we shall try at the Potwell Inn in the coming season.
Finally, it’s the time of year when we start to seriously attack the preserves, and tonight we had a bottle of preserved figs from the allotment. Last season gave a marvellous crop of figs and we tried all sorts of ways of preserving them. Drying, it seems, would be more successful with a proper dehydrator because the oven is a bit too hot, and sun drying demands a sunnier, warmer and dryer atmosphere than we normally have. The preserves on the other hand are delicious. We flavoured the very light syrup with Earl Gray tea and fennel seeds and bottled them in the pressure cooker for safety. It was a lovely foretaste of summer.