Option of freezing the fruit and veg in a ziplock bag instead of a mason jar. Cut fruit into smaller pieces. This will help keep the fruit and leafy greens from freezing together in a large clump and the smoothies will blend more easily.
Smoothie packs will keep for several months in the freezer, but are the very best quality when used within 2-4 weeks.
Store smoothie packs away from foods with strong odors.
Smoothies can be blended and then frozen until ready to use. Just defrost them in the fridge the night before you are ready to use. Some separation might occur, but the smoothies will still be fine to consume.