posted 14 years ago
Alfalfa is very deep rooted. If allowed to grow there for several years, the 2' deep roots will be competing with the tree roots for water and nutrients. It could cause more damage than the weeds that would otherwise have been there. Sure, alfalfa being a legume, will supply some nitrogen, but once your trees outgrow the vegetive stage and begin fruiting they will need more P & K than N.