Prosser, WA -- Temperatures in the Horse Heaven Hills this morning were climbing toward 78°F as Rick Hamman, director of viticulture at Hogue Ranches in Prosser stood in amid Merlot vines at the Zephyr Ridge vineyard. A cool spring has retarded development in many Northwest vineyards, and Hogue’s are no exception.“We’re experiencing not only quite a delayed bloom -- it’s looking like it’s at least two to three weeks behind -- we’re also getting an uneven pattern,” Hamman said. “You’ve got some vines that have pea-sized berries right now and still blooming.”