My kale is finished up and needs to be tidied up. Broccoli and cauliflower look great, but haven't done anything. My leaf lettuce needs to be headed back before it takes over. My cabbage is looking good. I have tomatoes, peas, beans, peppers, cucumbers, zucchini and eggplant in and they are doing well, but haven't produced anything yet. Asparagus is still coming in. Herbs, basil, chamomile, mint, cilantro, dill, oregano and thyme are doing great. I planted in zinnias, cosmos, daisies, and marigolds and they are beautiful if nothing else and seem to have helped to keep the soil in good shape. This is my third year of no sunflowers coming up, so I think I'm going to give up on them. I have one more bed ready to go for another round of planting, but I'm not ready.
I have four elevated beds that my husband surrounds with poles drilled in the bed and then wraps with fencing, so I can't advice how far down you should go. I don't get rabbits, but I do get snakes, birds, and an occasional deer. Of course last year, my worst offender was turtles. They were poking their necks through the wire and nibbling on the low hanging vegetables.
I always tend to get the plants started off right and then lack the produce or a bumper crop. I think last year I got enough peas to mix in with one salad.