Posted: 15/04/2014 at 17:47
Well, acidity is essential.
I prefer to use ericaceous SOIL rathen than mpc. So, that makes it even more expensive I guess. Soil ...you can still buy ericaceous soil....is more substantial in every way and worth the extra cost.
Can you get acid soil locally? Have you ever taken a PH sample of your own soil? How alkaline is it?
A mixture of ericaceous composf/soil, leaf mould,(if acid) garden soil (if acid) and bark chips ( but these need to be acid too). You already have 16 containers of compost to add to your bed.
It seems to me your bushes will be pretty close together ....maybe too close?
I grow my blueberries in largish confainers plunged in the garden. Perhaps you could do the same?
If you cannot provide enough ericaceous soil I would be inclined to keep in pots