Wash & rinse your containers; make sure they have tight fitting lids.
Prepare your berries. Remove stems, rinse, and drain in colander. Add berries to your kettle and mash with a potato masher. When you have 3 1⁄4 cups of crushed berries, add 1⁄4 cup of fresh lemon juice.
Gradually add 1 box of MCP Pectin into fruit. Mix thoroughly and let sit for 30 minutes, stirring every 5 minutes to dissolve pectin completely.
In a separate bowl, measure 4 ½ cups of sugar.
Gradually add and stir in sugar with the crushed berries until dissolved. Note: You can sample your jam mixture to check that the sugar is completely dissolved. When it's no longer grainy, it is ready.
Pour into prepared containers leaving ½" head space for expansion during freezing.
Let stand until set. Jam will last 2-3 weeks in the fridge or 1-2 years in the freezer.