Best time to harvest potatoes
This is my second year of growing potatoes in tubs and has been somewhat more successful than last year. Sometime around August (just before the heatwave) I planted 10 Maris Peer seed potatoes in four tubs. All the potato tops have now collapsed, although they are still greenish. I intend leaving them until they have gone yellow or died off but wondered how long I could leave it before I extract the potatoes from the tubs. Ideally, I would like to spread this over a few weeks until, say December, but wonder if this would be wise. Would there be much difference to the crop if I harvested them today or in say four weeks?