For longer term storage Chard can be frozen like Spinach. This is useful for those times when the plants are producing far more than you can use immediately.

Storage Req: Freezer
Storage Temp: 32°F
Storage Length: days

Use the leaves immediately after harvest, as they are thin and don’t keep for very long (only a few days in the fridge in a plastic bag).

Storage Req: Refrigerator
Storage Temp: 35-40°F
Storage Length: 1-5 days