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But it can take 70-90 or more for potatoes to mature. This depends on the variety. The potatoes can carefully be harvested at 7-8 weeks for a early harvest of small potatoes. For full grown potatoes you would harvest in the fall when the leaves turn brown. But it can take 70-90 or more for potatoes to mature.
Depending on the variety planted, you are generally looking at anywhere from 2-4 months from planting to harvest. If you wish, you can harvest baby potatoes as soon as 2-3 weeks after flowering has finished, perfect as a delectable side dish for a delicious dinner. These tiny new potatoes are sweet and tender as the sugar has not yet been converted into starch.