The sheltering effect of shade is readily apparent in the garden following a dry week after a particularly rainy period. Fortunately, temperatures in this rain-free week remained mild, and again we are headed into a rainy spell (hopefully, a short one). The lack of extreme heat should preclude damage to plants that are pumped up due to excessive moisture, but already ones in sunny spots have faded slightly.
I have just returned from a week in the northwest, two days touring gardens on the Kitsap Peninsula and Bainbridge Island west of Seattle, then business in the Portland area. The weather was delightful, and the gardens splendid despite an unusually dry period that stressed some full sun plantings despite irrigation that is necessary through typically dry summers in this region.
Gardeners are constantly aggravated by weather, and certain that another region must be superior. While I am quite content with my Virginia garden, I admit envy that several treasures that struggle in our heat thrive in the relative coolness of the northwest.
But also, I realize a difference in the shade of towering firs and the shallow rooted maples and tulip poplars that crowd the margins of this garden. In many spots along this forested border, a planting hole can be difficult to carve out between roots.
While mayapples (Podophyllum) and Jack-in-the-Pulpits (Arisaema) grow natively at the edge of this garden, none grow as plump as ones in the garden of Bloedel Reserve on Bainbridge Island. Waxy bells (Kirengeshoma palmata, below, and K. koreana) thrive, but I have struggled growing Paris polyphylla and Rodgersia (above), which are robust in these gardens. I find small solace that Bigleaf magnolia (Magnolia macrophylla) grows with more vigor in this Virginia garden, and while Chinese dogwoods (Cornus kousa) thrive on both coasts, our native dogwood (Cornus florida) is dependent on the heat of the east. No doubt, there are others that prefer our climate and year around rainfall, and probably some share of northwest gardeners would like to escape damp, gray winters.
A visit to exceptional gardens is inspiring, though I am uncertain whether to redouble or abandon efforts to plant southeast Asian natives that fill these gardens. Perhaps a few more mayapples and trilliums will find their way into the garden, and I must expand the selection of Solomon’s Seals (Polygonatum, below). While I am fortunate to have discovered (after considerable trial and error) plants that tolerate this shallow rooted, dry shade, I must probe for shaded areas with deeper soils to plant more treasures.