Needs very specific conditions—well-drained but moist, acidic soil and a cool, humid environment. Conservationist’s Status Report

“They are low growing, creeping over the mountain soils... Alpine clubmoss, Fir clubmoss and Stag's-horn.” Facebook · Wicklow Mountains National Park

Very High. This is not for the casual gardener. It is notoriously difficult to transplant and extremely sensitive to dry soil.

Diphasiastrum sitchense (Rupr.) Holub - Rare Plants - Maine.gov

"If you find yourself hiking in the high mountains, definitely keep an eye out for this little marvel. It looks like a cross between a miniature pine tree and a thick moss, hugging the ground to stay out of the wind. Seeing it in its natural habitat—usually moist, subalpine rocky slopes—is a real treat for any amateur botanist. It’s an ancient plant with a lineage going back millions of years, which gives it a legendary feel when you spot it." Gardener’s Performance Review