1) allow pets to eat snacks without playing the pet game... seriously, you can feed a pet anything but another pet and snacks and they should be able to eat both.
Result? More crowns spent on gardening and fewer trainers clogging training realm
2) allow wizards to cast gardening spells on other wizards plots
Result? More training up of gardeners by other wizards (more collaborative fun) and more crowns spent on gardening