If you don't use all the leaves in the jar, they can be stored in the fridge r the freezer. In the fridge, keep them in their original jar and use them within 10 days, or otherwise if the jar gives a recommended use by date. To freeze, drain the water from the leaves and pat them mostly dry (they do not have to be completely dry, just not dripping wet). Put into a plastic freezer bag and lay flat. They keep for up to 1 year when frozen.