What's the best application method for compost tea?

Selecting the right application method for compost tea optimizes the benefits on various plant parts. Soil drenching applications place microbes directly into the root zone, while foliar spraying methods apply a coat to the leaf for the purpose of preventing disease. I will use both methods depending on crop type and/or season. Application timing and method of application will greatly influence effectiveness. This document outlines the best application methods for achieving optimal results.

Timing is critical for success when applying. Whenever possible, use foliar sprays at dawn or dusk when temperatures remain below 75°F. This will help to prevent leaf burn from sunlight exposure. Although I typically apply sprays in the early morning before sunrise in the summer, this is not always realistic. Soil drenches can be used at any time of day, but work best when made just before a rain event or irrigation of the crop. Neither is successful when windy.

Employ distinct tea preparations according to the application method. Use fine-mesh strainers with foliar sprayers to prevent nozzle clogging. For soil drench, mix a dilution of non-chlorinated water that is suitable for the plant's needs. I use undiluted tea on my tomatoes and a 1:5 dilution when watering seedlings. Be sure to agitate the tea mixture before applying it.

Use observations of plant responses to correct methods. A common observation is yellowing leaves, which signal over-application that will require a dilution adjustment. Fungal resistance also shows effectiveness on foliage. I am keeping records and results in the garden journal, and every year we improve implementation. I take soil tests every spring to measure the progress of microbial activity since drenching.

Read the full article: Compost Tea Brewing: The Ultimate Guide