There are tiny little wild blueberry bushes all over the property. I've planted 5 Tiffblue bushes at the top of the hill, in a row, about 8 feet apart. I've also bought 5 Climax bushes but don't want to plant them at the top of the hill. I'd rather plant them, like landscaping bushes, nearer the house at the bottom of the hill. They'll be about 150 feet apart. Is this too far for proper pollination to produce a good crop?