Making acid soil for blueberries
How can I make soil acidic for 3-4 blueberry bushes?
This 8 x 4 foot area has a neutral pH and is covered with turfgrass. It is in zone 5 - Iowa.
The only idea I can come up with is to collect and compost massive amounts of pine needles on the area. Does anyone know what kind of "mass" I am looking at here and how long it will take to break down and acidify the area? (For sustainability reasons I don't want to use peat moss.)
Do any herbaceous plants naturally acidify soil?
Another thing rattling around in my head is whether or not I should even do this. If the area is not acidic to begin with, it seems as if I should find an alternative berry bush that will thrive on the site as it is; i.e. "use onsite resources" and "make the least change for greatest effect".