How does your garden grow?

‘Once you have dahlias, you always need more,’ Dena Bosscher said By Elisa Claassen For the Tribune WHATCOM — Dena Bosscher of Everson has about 150 different varieties of dahlias in her cutting flower garden. Bosscher’s father, the late Harold Heiner, was a long-time county resident. She said recently that he always had dahlias. “Of…