Visitors who enter my greenhouse during colder months are invariably stunned: “You don’t have any heating? So how come all this stuff survives?” Amid pots and containers brimming with anything from land cress to mizuna, I smugly explain that I don’t need to turn up the heat to enjoy something fresh from my greenhouse 365 days of the year. In fact, I use no heat at all in my greenhouse – other than the free, non-polluting kind I harvest from the sun.
Although I still find the smell of a paraffin heater powerfully evocative – I’m whisked off to boyhood winters, pottering with sooty wicks, cold drips and sheets of bubble plastic – my days of heating a greenhouse are long gone. It was my awareness...
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