Making Lacto Bacillus Serum (organic fertilizer) to Fortify My Garden



Do you want to learn about a super easy way to increase the productivity and health of your garden?   This fertilizer called “labs” for short is easy to make and the results are amazing.  I learned about making lacto-bacillus serum from the head horticulturalist at the Denver Golf Courses who also heads a very productive donation garden at Harvard Gulch Golf Club in Denver.

The term Lacto-Bacillus Serum sounds fancy but in truth, this simple to make recipe provides a workhorse of beneficial bacteria for your garden and has multiple other applications including :

  • Speeding decomposition in the compost pile
  • Unclogging drains
  • Treating powdery mildew on squash plants
  • Eliminating odor in animal bedding
  • Improves growth of plants when applied as foliar spray and soil drench.
  • Improves their efficiency in absorbing nutrients so naturally, growth is enhanced.

“With the use of these microorganisms, the nutrients you spray or drench to feed your plants become more bio-available and are more easily absorbed by the plants. Technically, you can say that plants do not use organic nutrients directly. Microorganisms convert organic nutrients to their inorganic constituents which the plants utilize. Utilizing microbes, you will notice better plant growth and health.”   –The Unconventional Farmer.

Labs Recipe:

Ingredients:   rice, water, milk


  1.   Day One:  Immerse a cup of rice in a quart of water.   Drain the water into a canning jar – filling it about 3/4 full.   Discard the rice.   Cover the jar with a paper towel but it should not be airtight.   Store it on top of the refrigerator and after a few days, the liquid will separate.
  2.  Day Three:   Siphon off the center layer adding 1 part serum to 10 parts milk and put in another container, cover tightly and let sit for another few days.   Once curds appear, you can strain the liquid with a cheesecloth (the curds can be fried up and eaten).
  3.  Day 5-6   For the Garden  Add 1 part serum to 20 parts water to spray in the garden.   Use on plants weekly Store in the frig or add molasses to store at room temperature.  Stable for about a year.

Sources of information:

The Unconventional Farmer:

Build a Soil:


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