We just started a blueberry patch in our garden and we were told to use peat moss in our beds. Here is a link to the University of MN Extension Office's website on home blueberries. It might be helpful. This is the first time I have added a link, so if it does not work just do a internet search for University of MN Extension and the use their search engine for home blueberries. Good Luck!

Here is a link that might be useful: University of Minnesota Extension Office

Andy:

I don't know what Soil King is, but anything with a Ph anywhere near that high is not for blueberries. New garden is right that about half peat moss is a good mix for blueberry soil, but since you didn't get that word in time, and don't want to change out the soil, I would suggest mixing in a cup or so of iron sulphate at the surface. This will lower the Ph fairly quickly. You should be able to find this soil amendment at any large nursery and many bigbox stores. For longer-term acidification, you may also use garden sulphur. If your nursery does not know what to add to lower Ph, you need to find a new nursery.

Don Yellman, Great Falls, VA