It’s not all gloom and doom on the allotment, in fact I’m not a very gloom and doom person – I’m melancholic, which is altogether different and a lot more creative. But lifting these big pumpkins had me as happy as could be and groaning loud enough to attract a small group of spectators on the footpath, and some ooohs and aaas as I staggered over to the wheelbarrow. We don’t have any means of weighing the big one, but compared with a 25K bag of sand, I’d say it was more like 30Kg – around 66lbs – far from the record breakers that need a fork-lift to move them, but very gratifying for us. We could have let them go on growing, but we need to get the soil prepped ready for the autumn, and the outbreak of larceny on the site has made us cautious about leaving them in full view. Pumpkins are as cheap as chips in the supermarkets, but big ones like this seem to attract thieves.
So we were clearing the decks today and heaping the bean vines on to the compost heap which is now groaning under the weight. At the beginning of the year I calculated that we’d have to fill the first bin four times to generate enough compost to cover the whole plot. We haven’t managed four, but it’s been full to the top three times, and I’ll turn it all into the second bay next week and start again. The end bin that had autumn leaves in it has now rotted down into a fine mulch of about 1/3 the volume, and that’s the problem with our compost – it rots down so much that it’s reduced by as much as 2/3 during the process. However it’s so rich and full of nutrients that it doesn’t need to be piled on thickly. Earlier in the season I turned over the first full bin and it’s now more than perfect – it’s positively beautiful. But however carefully we sort and compost our paper, cardboard and green kitchen waste with the prunings and tops from the allotment there’s always a residue that needs to be more thoroughly dealt with.
We’ve thought long and hard about incineration and the numbers are quite complex. If we just put all the weeds and infected material on the compost heap it would not get hot enough to neutralize the pathogens or kill the seeds. If the compost starts getting anaerobic it will produce methane, but even if it’s well managed and aerobic it will still produce CO2. If it goes to a landfill site it will certainly be anaerobically rotted and so will produce methane and, in addition, the carbon cost of transporting it needs to be added in. So the carefully managed incinerator can’t be rejected out of hand, and the residual ash is a good source of potassium, nitrogen and phosphorous. The biggest problem with burning is the nuisance, inconvenience and smoke to nearby allotmenteers. If a well managed incinerator is allowed to get really hot to start the process, and then green material is added continuously to keep the process going, and then it should function for days with no more than a whisp of smoke and a little steam when wet material is added. In short there’s no completely green way of disposing of noxious and infected plants. We’re not allowed to use the incinerator until 1st October in any case , but we’ve bagged up all the infected tomato vines and they’ll be disposed of on Tuesday.
We’ve also started thinking already about next season’s sowings, and the catalogues have just started to appear in the post box. With such a strange season we’ve seen several unexpected results, not least the way that the Mediterranean vegetables – the courgettes, peppers, aubergines and chillies have all done much better outside than in the (recently stolen) coldframes and the greenhouse. This may well be to do with their ability to root deeply and find water, and also the positive impact of freely circulating air, but it’s hard not to hold climate change partially responsible as well. So our choice of what to grow is going to be affected by three factors next season, firstly the possibility of food shortages if brexit goes ahead, secondly trying to second guess the weather and finally the contribution of our 250 square metres to alleviating climate heating and insect extinctions.
Finally I took this photograph of a clutch of slug eggs today. They’re a pest, there’s no doubt, and yet they also perform a useful function on the allotment by eating dead plant material so we try to control them with beer traps, bait plants like Tagetes and picking them off when we see them. Their only total success this year was a row of carrots that were scythed off before they even got going. But that’s gardening for you! As you see the eggs are laid on compost whereas white butterflies lay their eggs on leaves – I think there’s a bit of a clue there as to the slug’s favourite food. So if we don’t leave dead and decaying vegetable matter lying around near vulnerable plants the slugs will be less likely to visit.