At Harvard, as part of our organic landscaping and maintenance program, staff are creating compost tea.

Compost Teas are a specific liquid biological amendment made by coaxing the beneficial organisms from the compost and depositing them into an aerated water solution with various food sources. The advantage of the tea is that recipes can be developed and fine-tuned to target specific conditions and plant needs. Careful application of compost teas can speed up the process of balancing the soil biology... but achieving the proper mix requires time and testing. Remember, that the better the compost, the more effective the tea!

The following are some additional considerations for Compost Tea:

  • During the brewing process bacterial populations, on average, double every half hour.
  • Applications are particularly favorable for trees and lawns which require the beneficial organisms but not necessarily a high percentage of organic matter.

Build your own Compost Tea brewer