Every year Wilson Farms has Rhode Island Greening apples and I love them for their clean sweet/tart flavour. This is a very kale-heavy smoothie so I add EmergenC and a bit more honey than usual to cut through the earthiness of the kale.
I used honey from our CSA in Lincoln and some kale that was wilting from the CSA as well. This is a double batch so you. an drink with a friend or put 1/2 in the freezer in a Ziploc bag or ice cube tray to add to a smoothie another day.
I used a Jona Gold left over from apple picking that was getting soft.