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Sex Change

Did that get your attention?  It certainly does for the bees that pollinate Weigela middendorffiana.  They have learned to visit yellow flowers preferentially, as they contain the most nectar.  As the flowers age, they turn red, and one study noticed that bees visit the older, less nutritious flowers less frequently.  Floral color change after fertilization […]

Spiny Holly?

I live in Gig Harbor, WA (cold zone 7) and would like to plant a “spiny” leaved holly that can grow to at least 10′ in height & width as a yard parameter hedge. The soil is acidic and has full shade from the towering Douglas Firs on the property. I found the below info […]

Rooftop trumpet vines?

Dear Expert (Carrie, Bob or Susan) We have a client who’s property is situated on the 16th floor with a rooftop garden in downtown Seattle. The terraced garden faces south and southeast. The 4 trumpet vines are each in their own containers that are 24″ square x 26″ deep along with Algerian Ivy, trailing Rosemary. […]

Beesia?

I would like to plant some beesia at the top of a shady ravine.  I am concerned about the moisture level, though.  The area is dry shade, although I could run a line from my drip system along there.  Even though  I’ve read that beesia prefers moist soil, can it do OK with drier conditions? […]

What is this?

The plant you’re inquiring about is Cardamine trifolia, commonly know as lady’s smock or 3-leaved cuckooflower. This is an attractive, well-behaved evergreen ground cover, about six-inches tall and covering up to twenty-four inches across. The dark green leaves with a purple reverse are three-parted. The white flowers are borne in early spring. Flowering is brief […]