Rats will eat tomato plants, but they target the fruit more than the leaves or stems
Rats eat tomatoes, especially ripe or ripening fruit. They gnaw through the skin and hollow out the inside, leaving behind half-eaten fruit with ragged holes. A single rat can damage multiple tomatoes in one night. Rats are less interested in the green parts of the plant — the leaves, stems, and roots — unless food is scarce or the plant is very young and tender.
The damage pattern matters for identification. Rats bite from the outside in, creating irregular openings. They often leave tooth marks around the entry hole. Squirrels, by contrast, tend to take larger bites and leave cleaner edges. If you see gnawed tomatoes on the ground or still on the vine with ragged holes and visible bite marks, rats are the likely culprit.
Rats are most active at night, so damage often appears overnight. You may find partially eaten tomatoes on the soil below the plant or still hanging on the vine. Rats also leave droppings — small, dark pellets about the size of a grain of rice — near feeding areas and along their travel routes.
Key Takeaways
- Rats eat ripe and ripening tomatoes by gnawing holes in the fruit from the outside, leaving ragged, irregular openings with visible bite marks.
- Rats are primarily interested in the fruit, not the leaves or stems, unless the plant is very young or food is extremely scarce.
- Damage happens at night, and you may find half-eaten tomatoes on the ground or still attached to the vine, along with small dark droppings.
- Physical barriers like cages and netting, combined with removing fallen fruit and sealing entry points to nearby structures, are the most effective prevention methods.
- Poison and snap traps can reduce rat populations, but removing food sources and shelter is necessary to keep rats from returning.
Why rats target tomato plants in gardens
Rats eat tomatoes because the fruit is soft, accessible, and calorie-dense. Ripe tomatoes contain water and sugars that rats need, especially in late summer and fall when natural food sources become scarce. A rat's teeth never stop growing, so gnawing on tomato skin also helps them manage tooth wear.
Rats are drawn to tomato gardens for a second reason: shelter. If your garden has dense foliage, mulch piles, compost bins, or nearby structures with gaps and holes, rats will nest there. A garden that offers both food and a safe place to hide is ideal for rats. They will return night after night to the same plants.
Rats are also opportunistic. If your garden is their only nearby food source, or if you leave fallen tomatoes on the ground, they will exploit it. A single fallen tomato can feed a rat for days and signal to other rats that the area is worth investigating.
Physical barriers that stop rats from reaching fruit
The most reliable way to protect tomatoes is to prevent rats from reaching the fruit. Cages and netting work because they create a physical obstacle. A cage made of quarter-inch hardware cloth (not chicken wire, which rats can chew through) placed around the base and lower stems of the plant stops rats from climbing up. The cage should extend at least 12 inches up the stem and be buried 2 to 3 inches into the soil so rats cannot dig underneath.
Netting draped over the plant or cage also works, but only if it is tight and has no gaps. Rats can squeeze through openings as small as half an inch. The netting must reach the ground and be secured so rats cannot lift it from the edges. Check the netting regularly for tears.
Raised beds with solid sides and a hardware cloth bottom offer protection for entire rows of tomatoes. The bottom prevents rats from burrowing up from below. The sides should be at least 18 inches tall, though rats are good climbers, so a cage or netting over the top of the bed adds another layer of defense.
Removing food and shelter to discourage rats
Rats will not stay in a garden if there is no food or shelter. Start by removing fallen tomatoes every evening. Do not leave ripe or overripe fruit on the vine longer than necessary. Harvest tomatoes as soon as they are ripe, even if you plan to eat them later. A tomato left on the plant overnight is an invitation.
Clear away mulch, leaf piles, and compost bins that are close to the tomato plants. Rats nest in these materials. If you use mulch, keep it at least 12 inches away from the base of the plant. Store compost in a sealed bin, not an open pile. Remove any boards, tarps, or debris that could shelter rats.
Seal gaps and holes in nearby structures — sheds, garages, fences, and the foundation of your house. Rats can enter through openings as small as a dime. Use hardware cloth, steel mesh, or caulk to close these entry points. If rats have a safe place to nest within 50 feet of your garden, they will use it as a base for nightly foraging.
Trapping and poison as part of a broader strategy
Snap traps and poison can reduce the rat population in and around your garden, but they work best when combined with the methods above. Snap traps are faster and more humane than poison. Bait them with peanut butter, dried fruit, or nesting material and place them along walls, under plants, and near droppings. Check traps daily and dispose of dead rats in a sealed bag.
Poison (rodenticide) kills rats, but it takes several days and the rat may die in a hidden location, creating an odor problem. Poison also poses a risk to pets and wildlife that eat poisoned rats. If you use poison, place it in a tamper-resistant bait station so only rats can access it. Never scatter poison openly in the garden.
Trapping and poison alone will not solve the problem if rats can still find food and shelter. A rat killed by a trap will be replaced by another rat if the garden still offers tomatoes and a safe place to nest. Use traps and poison to reduce numbers while you remove food sources and seal shelter.
Companion plants and repellents that have limited effect
Some gardeners plant marigolds, garlic, or mint near tomatoes, hoping the smell will repel rats. Research does not support this. Rats are driven by hunger and shelter, not by smell. A hungry rat will eat through a marigold bed to reach a ripe tomato. Companion plants may have other benefits for your garden, but rat control is not one of them.
Capsaicin sprays (made from hot peppers) and ammonia-soaked rags are sometimes recommended as rat deterrents. These may cause temporary discomfort, but rats adapt quickly or straightforward avoid the treated area and feed elsewhere on the plant. They are not reliable and require frequent reapplication.
Ultrasonic devices that claim to repel rats have not been proven effective in outdoor gardens. Rats are intelligent and habituate to noise and vibration. If the garden still has food and shelter, a rat will stay despite the noise.
Timing and seasonal patterns of rat damage
Rat damage to tomatoes peaks in late summer and early fall, when tomatoes are ripening and natural food sources in the wild are declining. Rats are also preparing for winter and need to build fat reserves. A garden full of ripe tomatoes is an ideal food source during this period.
Damage may decrease in winter if rats move indoors or if tomato plants stop producing. However, if you live in a mild climate where tomatoes grow year-round, or if you store tomatoes near the garden, rats may continue to feed throughout the year.
Spring and early summer damage is less common but can occur if rats are nesting nearby and young plants are tender. Newly planted seedlings with soft stems are more vulnerable than established plants with woody stems.
Frequently Asked Questions
Can I use chicken wire instead of hardware cloth to protect tomatoes?
No. Rats can chew through chicken wire. Use quarter-inch hardware cloth instead. It is stronger and rats cannot gnaw through the metal mesh. Bury it 2 to 3 inches into the soil so rats cannot dig underneath.
Will rats eat green tomatoes?
Rats prefer ripe or ripening tomatoes because they are softer and sweeter. Green tomatoes are harder and less appealing. Rats will eat green tomatoes only if ripe fruit is not available or if the plant is very young and tender.
Do rats eat tomato leaves and stems?
Rats rarely eat tomato leaves and stems. They focus on the fruit. Leaf damage is more likely caused by insects like hornworms or beetles. If you see stems gnawed down to the ground, look for other signs of rats — droppings, burrows, or damage to fruit — before assuming rats are responsible.
How do I know if it is rats and not squirrels damaging my tomatoes?
Rats create ragged, irregular holes with visible bite marks. Squirrels take larger bites and leave cleaner edges. Rats are active at night; squirrels are active during the day. Look for small dark droppings (rat) versus larger pellets (squirrel) and check for burrows near the base of plants, which indicate rats.
Will removing one rat solve the problem?
Removing one rat may reduce damage temporarily, but if food and shelter remain available, other rats will move in. Focus on removing fallen fruit, sealing shelter, and installing physical barriers. Trapping works best as part of this broader strategy, not as a standalone solution.