Tomato plants are perennial, though they are cultivated on an annual basis. In the case of commercial cultivation of plants, they are typically harvested whole and the plants in the fields are replanted completely new.
Those who live in the Southern region of California will be able to grow what are referred to as â€œtrue perennialsâ€, because of the fact that the climate there is warm enough to do so. Although there are hybrid tomato plants, there is only one type of California tomato.
You will find that the climate tomatoes are grown in largely determines whether or not they are considered to be true perennials in the classic sense.