How invasive is this plant
As a general rule we do not recommend groundcovers under trees. Most of the feeder roots of trees are in the top 6 to 18 inches of soil and therefore are in competition with anything planted there. Soil under trees is typically dry. Anything planted there will compete for the scarce water resource. That said, Goldmoss Sedum is a shallow rooted plant that requires little water and therefore does not represent a threat to the tree if it is already well established and receives adequate water. If the tree is newly planted (as in during the past two years) then the Sedum is a potential hindrance to its development.