Question: How tall a fence do I need to keep deer out of the garden? What's the best material?

Answer: Deer can and will leap over fences to get at a garden, so you need one at least 8' high to keep them out. Deer are hesitant to jump over a solid fence because they can't see what's on the other side, so if it's appropriate for your situation, consider a solid fence. If you use chainlink rather than wood, you can lay some fencing flat on the ground around the perimeter. This will discourage deer from getting too close too the fence.