Compost Tea Research
ANSWERING THE QUESTION:
Does Compost Tea make certain leafy vegetables grow bigger or not?
A Producer Grant sponsored by Southern SARE (Sustainable Agricultural Research & Education) ending in March 2025.
Microbial Populations in Compost
Compost Tea / Extract
Does feeding the microbiology in the soil really make a difference? These results were from teas that were unfed.
This first batch of vermicompost was rained on and not turned due to fear of breaking fungal strands. This resulted in almost anaerobic, too-wet conditions. The tea that was brewed from it was not fed any microbial foods and while resulting in no pathogens, had hardly any beneficial bacteria in it.
The second batch of vermicompost was kept indoors. While resulting in a more robust compost, did not produce a robust tea according to test results. Compost tea sampling 48 hours post-harvest may have skewed true results.
Vermicompost Microbiome November 2023 vs.
Compost Tea Microbiome November 2023
Literature Review of Compost Tea Research
You can read a very broad summary of the studies below here.
Plant Growth Promotion
Effects and relationships of compost type,
aeration and brewing time on compost tea properties, efficacy against Pythium ultimum, phytotoxicity, and potential as a nutrient amendment for seedling production (tomato and sweet potato).
Plant Disease Control
Powdery Mildew (Fungi: diff Genera)
Grey Mold (Fungi: Botrytis cinerea)
Leaf Spot Disease (Fungi: Alternaria alternata)
Mummy Berry Disease (Fungi: Monilinia vaccinii-corymbosi)
Review of Compost Tea & Plant Diesases
Plant Resilience in Warming Climates
Effect & Relationships of Compost Type, Aeration & Brewing Time
Compost Tea 101 (University of Arizona)
Nutrient Enhancement by Eisenia foetida in compost and compost tea by Ed Stockman (Organic Agrosystems Research)
Enhanced Plant Microbiology
A Krona graph of vermicompost of Troy Hinke
Report for the analysis of 16S microbiome data by Dr. Laurent Falquet, UniFr
courtesy of Adrian Rubi at www.edapro.ch
A microbiome analysis of bacteria and their populations according to microbial starter (feed) in compost tea www.edapro.ch
Microbial Starter for the Enhancement of Biological Activity of Compost Tea
Does compost tea really multiply the biology in the original compost it's brewed from? And if so, how much greater are the populations? How much and what do we need to feed the good bugs for them to grow?
Also check out "Table IV: Nutrients and Heavy Metals Composition of Compost Tea Alone and Microbial-Enriched Compost Tea, at Day-3 of Brewing" in this study.
How to Brew Compost Tea
a Compost Tea Podcast Course
courtesy of Troy Hinke of Living Roots Compost
Dr. Ingham's comprehensive manual on making, applying, and assessing compost tea is now available in its 5th edition. A must for any user of compost tea.
Soil researcher Steve Diver's comprehensive notes on Compost Teas, literature review until 2002, and slides to his presentation. Really good pictures of the biology and cool compost tea facts in this one!