Mixing our Mittleider Pre-plant Fertilizer
Mixing up a batch of Mittleider pre-plant is an easy task and is inexpensive to do. The three ingredients in Mittleider pre-plant are lime or gypsum, boron and epsom salt.
Do I need gypsum or lime?
It is easy to determine which one you need. If your annual rainfall is 20 inches or more you will need lime. If you receive less than 20 inches annual of rain then you will need gypsum. Don’t know your average annual rainfall? You can ask your local extension office or simply Google it.
Mittleider pre-plant mixing instructions
According to the Mittleider Gardening Course book, 4th edition, on page 51, we are going to mix 5 pounds lime of gypsum, 1 ounce of boron from 20 Mule Team Borax20 Mule Team Borax, and 4 ounces of magnesium sulfate from plain old Epsom Salt. Check your Walmart or favorite store for the best prices. The Borax is a washing additive in the laundry detergent area and the epsom slat will be in health and beauty. You will also need an inexpensive digital kitchen scale to weigh everything.
Lime is generally sold in a 40 pound bag. We like to mix the entire bag of lime at once. So to the 40 pound bag of lime we add 2 pounds of Epsom Salt and 8 ounces of 20 Mule Team Borax. This comes from page 53 of the 5th edition of the Mittleider Gardening Course book.