Which Plants Benefit From Mycorrhizal Fungi? Mycorrhizal fungi are beneficial for the majority of trees, plants, shrubs, and edibles. For example, rhododendrons, azaleas, heathers, cranberries, and blueberries can use specially formulated products, such as root-grow ericoid. The fungi help plants better absorb water and nutrients from the soil. in Business > Businesswith recharge-plant-nutrientby 2 users