Winds NNE at 10 to 15 mph. Evening: Cloudy skies this evening will become partly cloudy after midnight. Low 44F. Winds ESE at 5 to 10 mph.
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.
Typically considered a southern crop, sweet potatoes require 100 to 140 days to mature after transplanting to the garden. These tender plants do not tolerate frost and suffer when temperatures fall below 50 degrees Fahrenheit, making it difficult to grow these vining plants in northern climates.