hi
i grew spuds in a plastic dustbin last year,but i filled the dustbin to high up,but still got alot of potatoes,this year i have only put a small amount of earth in then the tubers on top cover with a thin layer of earth,then when the tops show cover again and so on the tops were 3 ft out of the dustbin last year before they flowered and then left about two weeks before i started to lift them,i gently removed them with a trowel for me to eat i got potatoes for 3 months

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joanne culyer