We had a bunny find our veggie garden at the school last fall. We're hoping he doesn't come back and maybe hasn't hatched a whole family over the summer. We added 'rabbit fencing' to the inside of our pretty white picket fence (that did nothing to keep out the rabbit). It seems to have worked, but we'll see. We're about to start planting again this week.
Lowe's sells green plastic coated rabbit fencing in 25ft. rolls. It's quite attractive, or at least inconspicuous, and if you just want a temporary fence you can throw into place very quickly, it's a good answer. You can cut it to lengths with wire cutters or snips, and just fold the cut ends around the verticals to make circular 'pens' around the plants you want to protect.
You'll probably need to fasten it into the ground with tent pegs or some sort of ground staples to keep the bunnies from burrowing under it. A sprinkle of scent deterrent in the few places the bunny found a big enough gap in our fence stopped them from coming in. The granular scent deterrent all by itself didn't do much to slow him down. Scarecrows and motion reflectors also didn't last - he figured out that they were not dangerous pretty quick.
