Healthy microbial activity outdoors can be encouraged through the use of organic compost. Compost helps to break down organic matter, which in turn adds essential nutrients and minerals to the soil that encourage beneficial microbes such as fungi and bacteria. Cover cropping can help to promote healthy microbial activity by providing a variety of nutrient sources for beneficial organisms while suppressing weed growth. Using natural pest control methods such as companion planting or introducing beneficial insects into your garden can help to keep pests away without disrupting the balance of beneficial microorganisms.