How can I keep deer away from my plants?

Get a salt lick and place it away from your plants. Deer love and need salt, so you're doing twofold.

Liquid Fence is the best! Beware it stinks! You can find it at Home Depot or Lowes.

My cousin uses a vegetable peeler on a bar of Irish Spring soap and scatters the shavings around her plants. There's also a product called Bobbex that works really well if you have something that is very precious to you.

I read this from Gma Kirk: A farmer gave me a gross recipe for repellent...but it works. cup or two of urine, tablespoons of crushed garlic, and cayenne pepper, two eggs in a gallon jug, shake well, fill rest of the way with water. Cap and let age a week. Then you drizzle small stream around the perimeter of whatever you want to keep them from eating. Works on rabbits, too

Mix one or two eggs in a gallon of water and spray. Deer hate eggs. The tree farm industry in the Pacific Northwest uses this technique to protect freshly planted seedlings. Of course, being a water base, it will wear off and be rinsed off by rain. Simply reapply.