How to harvest fruits and vegetables. Harvesting vegetables is one of the most exciting parts of gardening. It’s the time when all your hard work pays off, and you get to enjoy the fruits of your labor. However, it can be tricky to know when to harvest different types of vegetables. Some vegetables need to be picked when they’re fully mature, while others can be harvested when they’re still young and tender. In this article, we’ll take a closer look at some common vegetables and when is the right time to harvest them.