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oldryder

how to tell when blueberries need add'l acidifier?

planted bare root blueberries which are just starting to bud.

prepped the soil (which has an unmodified Ph of about 7.2) last fall by mixing about 50% peat and adding aluminium sulfate.

As plants begin to leaf out what will indicate that soil still needs add'l acidifier? according to package I can sprinkle add'l acidifier whenever needed.

thx in advance for any help.

Mark in MN

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