How Do I Keep Deer Out of the Garden? Keeping deer out of your garden requires a combination of deterrents, barriers, and strategic planting to prevent them from feasting on your plants. One of the most effective methods is installing a tall fence, ideally at least 8 feet high, since deer are excellent jumpers. If a solid fence isn't an option, you can try using angled or double-layered fencing, as deer are less likely to attempt jumping over a structure that confuses their depth perception.