I once visited a property in Ohio where everything had been decimated by deer — except for the vegetable garden, which only had a two-foot high picket fence. The plants were in raised beds and the garden had very narrow paths. Deer won’t jump if they cannot see a safe, clear landing spot, and between the fence and the sides of the raised beds, there was no room. The double fence I saw with Margaret in Betsy Clebsch’s garden was wire — two fences about four feet high and five feet apart. Roses were planted between the fences. Deer kind of hop, so a broad span cannot be jumped.