Dear Ms. Rupley,

Kalmia latifolia is difficult to establish in Michigan for a few reasons.  Kalmia latifolia has very specific site conditions such as morning sunlight, and well-drained, relatively infertile acid soils (pH of  4.5 to 5.5). They also depend on a symbiotic relationship with (integrated with the plant roots) whereby the fungus helps the roots, and the roots help the fungus. The mycorrhizal fungus association of mountain-laurel helps the laurel obtain water, minerals, and whatever nutrients they can from the soil. The gradual depletion or total lack of preexisting mycorrhizal development in the soils of Michigan over time results in the plants inability to thrive here.

A good alternative native shrub that thrives in Michigan full shade is Spicebush (Lindera benzoin).  Beginning in the middle of spring, a Spicebush will bloom its bright yellow, aromatic flowers in late March, April, and early May. Come summertime, seed and fruit production will commence, eventually maturing as early as August and September.

In the fall, the leaves of a Spicebush shrub turn very yellow before shedding for the winter. By winter, the bare tree’s berries are then browsed and eaten by many animal and bird species.  It is also deer resistant because their leaves are very aromatic and deer don't like them.