If you have somewhere on your land that gets wet more often, celery is great. It likes water and last year it lasted through a lot of the winter. It froze a bit near the end, but the rabbits still ate it. There are different varieties of kale, maybe a different one would work better? I can’t remember which varieties I have, but my rabbit prefers one a LOT more than the other. My rabbit also LOVES clover. Lovage is another option too, but it’s basically a stronger version of celery. My rabbit prefers celeri to lovage, but lovage can get huge. Lettuce is good too, but since it gets hot where you live, make sure to get one that doesn’t turn bitter with heat. Where I live, there is only one type we’ve found that stays good, but I have no idea which type since we planted them all at once. My rabbit doesn’t eat the lettuce if it turned bitter. Carrots can be planted and picked through the winter. Our climates are fairly similar and it works well. Plant more than you need and leave the rest to be picked during the winter. They get sweeter, but it’s just a treat anyways. My rabbit also likes basil leaves.