Experts and BHG readers answer.
What plants best compete with tree roots ?
Thanks for writing. Try lily-of-the-valley (Convallaria majalis), bigroot geranium (Geranium macrorrhizum), bishop's weed (Aegopodium podagraria), or epimedium (Epimedium) --- these plants all hold up well in dry shade. Make sure you keep them watered pretty well the first few months they're in the ground because they need moisture in order to develop strong root systems that will allow them to survive beneath the tree.
---Justin, Senior Garden Editor, BHG.com