Originally Posted by ExHic
I want to grow Blueberries, Currants, Raspberries, and Blackberries. Since the are bush type plants, I plan on creating a frames to keep the birds out. The thing is that many of these fruits will not grow (or have trouble growing) in Zones 3 and 4.
There's nothing wrong with any of those, and they should grow in those zones. Have you considered adding lingonberries to the mix? You couldn't hope for a more trouble free berry. The worst thing you can do is try to help them. They love being ignored, and hate being watered, fertilized or otherwise pampered. A little peat moss (or equivalent) before the snow comes is nice and, until they get established, it's good to weed around them some, but otherwise just leave them be.
I planted four different varieties along my driveway in Millinocket, Maine. One died, but that's only because my cat dug it up and I didn't notice before it was too late. I put a mesh down to keep my cat from using it as a litter box, and they're doing great. I was away from Millinocket for the spring and summer, and found several new plants when I returned. Millinocket is in Zone 4 but lingonberries will grow even in Zone 2.
Prepare the soil before planting, as they don't like rich soil, preferring peat moss to compost. And if you plant a few different varieties, not only will they all do better but you'll have crops coming at different times in the spring, summer and fall.
I have had poor luck with blackberries and raspberries for some reason. Although they grow wild here, ones that I've planted generally don't survive a winter.