Such plants are best pruned in spring right after petals fall. This is sometimes true, sometimes false. The acidity of soil depends not only on the nature of vegetation growing on it, but also on the type of rock below. Some soils under oaks and pines are neutral or alkaline, needing no lime. In actuality, these plants are merely the above-ground growth of fungus organisms living in soil.
Some fungi live on buried lumber, dead roots, or fine particles of organic matter.
Others live in harmony with tree roots, assisting in the uptake of water and nutrients. A few cause plant disease. The sudden appearance of mushrooms does not mean the lawn needs lime, fertilizer of anything else. If you object to their sprouting in lawns or gardens, use a rake to dispose of them. There is no chemical control for mushrooms.