Compost Tea Recipes

A few notes on Brewing Compost Tea

~ Use a 400 micron compost tea brewing bag to contain the bulk of the compost.  This sized mesh will allow the full diversity of biology to pass from the compost into your aerated compost tea.  We offer multiple sizes of reusable compost tea brew bags to accommodate any size brewer.

~ To prevent foaming, add ¼ - ½ tsp. of organic sunflower/ vegetable/ or neem oil per 5-gallons of water

~ Dilute soluble kelp, liquid fish and/ or humic acid in 2 – 4 cups of water BEFORE adding to the compost tea water. (This will help to neutralize any acid or preservatives added to stabilize the substance)

~ Keep compost tea under active aeration until you are ready to apply and serve fresh!

~ If your compost tea smells bad DO NOT USE IT on precious plants or crops, instead dispose of it across a lawn or along the edge of the forest

~ For general purpose compost tea we recommend avoiding molasses or sugars.  Bacteria are easy to culture in compost tea.  There is plenty of bacteria present in most compost especially worm castings.  Some plants do benefit from a more bacterial soil environment such as plants in the Brassica or cole family.  If feeding these types of plants, molasses can be a is a nice addition to your tea.  However, adding sugars early in the brewing process may cause the bacteria to over consume the available food resources.  If using molasses or simple sugars we recommend adding it near the end of the brewing cycle. 

~ Fungi take more time to culture in compost tea.  Enhancing the fungi in your teas can be achieved by adding 2 - 3 tbsp. of ground oats/ oat flour/ steel cut oats or bran flour to each 5-gallons batch of compost tea.  This can be added into your 400 micron compost tea filter bag along with your compost.  Another option would be to Pre-treat the compost or humus prior to brewing compost tea to help increase the fungal biomass.

Pre-treatment recipe for 5-gallon brewers

  • Place 2 – 4 cups of compost in a plastic container (for best results gather from different sources)
  • Apply ¼ cup of organic oat or soy flour or finely ground oatmeal across the compost and turn-under
  • Mix the liquid ingredients recommended in one of the compost tea recipes listed below with ¼ cup of water 
  • Apply the mixture evenly to the surface of the compost
  • Cover with a loose fitting lid or moist cardboard and store in a cool dark place for 3 – 7 days


Pre-activation times can vary based upon the presence of active fungi, dormant spores, moisture and temperature. Under the right conditions you should see a white fuzz of the fungi begin to cover the surface of the compost within 3 – 7 days.  This is an indicator of active fungi and will tell you that your compost is now ready for brewing into tea.

* = optional ingredients