Separate the clumps every couple of years to maintain plant vigor. At home in the sandy-rocky soils of the central U.S., narrow leaf coneflower (Echinacea angustifolia) is the perennial to plant ...
Many people consider that sandy soil doesn’t keep nutrients as effectively as the silt and clay soil. We won’t deny it! However, that doesn’t mean having a sandy soil garden is a disadvantage thing.
The two soil types were then submitted to different treatments. A solution containing rhizobia (bacteria that fix nitrogen in plant roots) was added to half the pots with nitrogen-poor sandy soil ...