Anyone have any idea of a rule of thumb for what rate (in inches) (oak) wood ashes can be added to a raised bed? I'm thinking at about 20% of the top 6 inches which would be, what, about 1 inch(?) and is probably the maximum application rate Any suggestions for a rate of sulphur incorporation (in inches) to restrict pH change when that much ash is added?--
Allan in Shepherdstown
(Whose pH runs around 8.5)
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