my google-fu has utterly failed me. i can only seem to find information on how to amend existing soil. i have no existing soil. i have an empty raised bed waiting to be filled with the appropriate soil for blueberry plants
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Use a peat based, container appropriate fill. When I was zipping through the Home Depot the other week, I noticed Miracle Grow is now doing a raised bed formulation. I didn't check it out, but it may work for you.
Otherwise a mixture of sand, peat moss, mushroom compost, and fill dirt, with a dollop of acid based plant food as a side dressing after the plants have settled in. We just did a bed of mostly mushroom compost with some sand, and the plants seem pretty happy so far, but it's only been a week.
Avoid pine needles as I recall they may carry the organism that spreads mummy berry.
Additionally, the thing about pine straw acidifying soil is a myth. That's good if you have some you want to use as mulch in a bed, but not helpful if you're trying to fix an alkaline blueberry bed.
Otherwise a mixture of sand, peat moss, mushroom compost, and fill dirt, with a dollop of acid based plant food as a side dressing after the plants have settled in. We just did a bed of mostly mushroom compost with some sand, and the plants seem pretty happy so far, but it's only been a week.
Avoid pine needles as I recall they may carry the organism that spreads mummy berry.
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