So I planted 4 different varieties about 6 weeks ago. My Cascade, Fuggle, and Kent Goldings are all growing like crazy (3+ ft. tall), but my Chinook (the one i was most excited about) isn't more than 1" tall. Any thoughts on how to revive growth on this one? All were planted in the same pots, soil, and are in the same location now. On a southern facing side of my apt building, so they're getting about 8 hours a day of sunlight, and all appear to be healthy.