I recently landscaped a small section in front of my studio. I picked plants that the bunnies traditionally leave alone, or the nursery tag labeled deer proof.
Knowing that hungry bunnies will chew on almost anything that is young and tender we put up a temporary fence of chicken wire, it's about 3 feet high. I'll be darned, the bunnies climbed (or hopped ) over it and chewed the flower stems off the statice (It's growing elsewhere in our garden and they never touch it.) and oh woe is me they seem to love kangaroo paw.
I guess my question is, how high does the fence need to be?

I use fences at least 4 ft high, and they have to be very tiny holes at the bottom of it or they will get through. I've seen them go through normal chicken wire. I use hardware cloth or special fencing that has tiny holes at the bottom and larger ones up top.

I'm sorry you have the rabbit problem. They do love to eat anything young and tender. I've tried different repellents too, and most of them work for a day or two, and then quit working.

I use a product PlantSkydd, the liquid version which have been very effective against rabbits and deer, spray on calm days and no rain expected for 24 hours, lasts 3-4 months.

Thanks Rj & Karen
Karen,
I've seen that type of fencing. "Sigh" I was trying to keep it low enough to easily step over so I could to get to the garden. It's been a bumper year for bunnies in our area.

Rj & Karen,
I've used blood and bonemeal, it works for a couple of days.
I've never tried plantskydd, we live in Southern California, it never rains

P.S. I love the bunnies in the garden, I just wish they would remember what they don't like before they chew something up and then spit it out.