Here is what you will need:
plastic freezer bags
Remove the leaves from the stalks by pulling off or cutting. The leaves of rhubarb contain Oxalic Acid which is poisonous and should never be consumed. The leaves are safe to be placed in the compost bin.
Wash rhubarb stalks with your preferred method of cleaning fruits and vegetables.
Some varieties of rhubarb have a tough outer skin that should be peeled off at this point. This skin comes off easily.
Chop rhubarb into small (amount 1/2 inch) pieces.
Measure rhubarb out by the cup.
Place the desired amount of rhubarb into plastic bags. Try to remove as much of the air from the bag prior to freezing.
Label with name, amount of rhubarb and date.
Lay flat in freezer until frozen then can be stored standing up if needed.