Take a large pot and place the fresh rhubarb leaves in it.
Pour in some mild or cold water until the rhubarb leaves are thoroughly covered.
Place the pot on the stove with medium-high heat and bring the water to boil.
Once the water starts boiling, reduce the heat of the stove to medium or medium-low level and let the mixture simmer for another 20 minutes to half an hour.
Turn off the stove, remove the pot carefully and drain the mixture.
Discard the rhubarb leaves and dilute one part of the solution with 9 parts of clean water to create Rhubarb Garden Spray.
Stir the mixture for few minutes until nicely mix up and then pour it into a watering can.
Spatter the Rhubarb Garden Spray onto the plants of your garden and enjoy garden bugs free environment.
Note: It is better to consume this Rhubarb Garden Spray within 24 hours in order to get the best results.