Today’s new vocab: dunkelflaute. However, this is a pink dogwood. Most are white; I recall reading some years ago that the dogwoods are susceptible to a virus and the breeders haven’t come up with a resistant pink dogwood. It seems like that still may be true as there are fewer and fewer pink dogwoods in our neighborhood. And none are young trees. [I admit that’s a very local, spatially biased observation.]
Oh: dunkelflaute (German). It’s usually translated as dark doldrums, or meteorologically: anticyclonic gloom. It’s when renewable energy can’t be generated (e.g., overcast days for solar panels, or still days for wind turbines).