With Jack Frost on the horizon you can hasten the ripening of your tomatoes and extend the season in many ways. The easiest is to simply stop watering. Green tomatoes will ripen quickly and once ripe will develop an even more intense flavor. Or you can root prune, cutting a half-circle around the base of the plant with a shovel. If a hard frost is looming, collect all the fruit and sort them out. Eat the ripe ones. Set aside those showing a little red and study the remainder. Some will be a hard, uniform green while others will be slightly dark green on the top with a whitish cast. The latter are known as “milky green” and, if placed on a soft surface in a dark container along with the semi-ripe fruit, will continue to ripen. YOu can eat great-tasting tomatoes well into November.
