You can use a watering can or a garden sprayer to apply compost tea. If you’re using a sprayer, filter the tea a second time through a cloth mesh or cheesecloth-like bag to strain out any pieces of organic matter.

Clean out your hand-held pump sprayer and fill with an appropriate mixture of tea. The rates of application will vary depending on your gardening situation. On poor soil it should be used straight, while on fertile soil it should be diluted — one part tea to 10 parts water. Apply it every two weeks.