I'm still fighting the whiteflies on the blueberries

Spraying once a week, but I still find one or two leaves infested with them weekly.
Early October I planted a bunch of radishes, peas, kholrabi, and carrots into the ground for a winter harvest. I guess it just doesn't get enough sun (3-4 hours), so they've barely grown. However, near the end of October and part-way into November, I also planted a few into larger pots on my balcony along with some lettuces, the area which gets sun almost all day. I harvested my first radishes today! Still took 68 days, I don't know why they won't grow as fast as the advertiszed 28-32 days
Anyone else doing winter harvest?