Measure the hops into a spice grinder or small food processor, process until it's a finer grind - you can leave them fairly rough, or bring it down to a powder.
Measure your Epsom salt and baking soda into your plastic baggie. Add the hops to the bag , as well as colouring if you're using it.
Use an eye dropper to measure your essential oil into the bag of ingredients
Press most of the air out of the bag, and close the zipper on it.
Manually crush any clumps in the salt, and work to combine the ingredients.
Transfer mixture to an airtight container, or measure into bath tea bags - 1 cup per bag. Filled bath tea bags should also be stored in airtight containers.
To use, measure 1 cup of Homemade Hop Bath Salt - or throw one bath tea bag - into a hot running bath. Rinse after use