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The color of the vine also indicates when to harvest Concord grapes. Throughout the growing season, the vine and stems are a light to medium green. When the vine and stems begin to turn to a light then medium brown, it means the grapes are ripening and ready to harvest.
When are apples ripe - how to tell! Apples ripen from the outside of the tree towards the center, so the apples out the outside of the tree will ripen first. Once they are picked, they stop ripening. Picking apples directly from a tree is easy. Roll the apple upwards off the branch and give a little twist; don't pull straight away from the tree.