The deer population in North America is steadily on the rise. As humans spread into their natural habitat, we eliminate the predators that keep their population in check. And as their numbers grow and their natural food sources decrease, deer turn to human gardens and farms for sustenance. And because deer are creatures of habit, once they identify a food source (such as tomato plants), they will keep coming back unless deterred.
Erect a deer fence around your tomato plants. The materials for deer fencing or netting can be found at your local garden supply or online. Look for products that are specified as "deer strength" and are between six and eight feet high. When you install the fencing, slightly tilt the top outward and away from the garden to discourage the deer from trying to scale it.
Spray deer repellent on the tomato plants. Deer repellent is cost-effective and certain products, such as Liquid Fence, are non-toxic. One application can last up to 4 weeks.
Spread predator urine around your tomato garden. Wolf and coyote urine can be purchased from your local garden supply store or online. When deer get a whiff of it, they assume those animals are in the area and steer clear.
Turn on your radio. Deer most often feed late at night and early in the morning when there are no humans afoot. If you turn your radio to a talk station, turn it on low and set it near your garden, it tricks deer into thinking humans are nearby.