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harvesting potatoesMany potatoes mature within 80 to 120 days after planting, depending on cultivar and conditions. For new potatoes (usually about an inch or so--or 2.5 cm--in diameter), a general guideline is to harvest them when the plant is in bloom. These should be handled delicately, as they bruise easily. Avoid disturbing/stressing the plant as best you can, so that the remaining potatoes can mature. Use new potatoes right away, as they do not store well. To harvest mature potatoes for storage, wait until 2 weeks after the plant has died at the end of the growing season (the leaves will yellow, turn brown, and die). This gives enough time for the tubers to mature and for their skins to thicken, so that they will store well. Again, be gentle when handling the potatoes--any scrapes may invite disease in storage. Harvest all potatoes before frost.

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