Clean the fresh rhubarb and chop into small cubes. If adding fresh strawberries, clean and chop those as well.
Add Rhubarb to the large cooking pot on the stove, with sugar, and cook on medium/low, slowly bring to a boil (if using fresh strawberries add those as well).
Once boiling, stir in strawberry jello packet. Be carful not to over stir.
Boil 2 more minutes.
Add the jam to the jam jars and store in the fridge, or leave headspace and freeze or water bath can.
Notes
Refer to the instructions above for the full water bath canning process.