Perhaps move plant to pot with ericaceous soil, if it's not too big, give ericarecious foliar feed, and see if it recovers ? Check your soul pH in several places before replanting, as this plant will prefer a ph of less than 6.0.

Perhaps move plant to pot with ericarecious soil, if it's not already too big, give ericaceous foliar feed, wait several months, and see if it recovers ? Check your soil pH in several places before replanting, as this plant will prefer a ph of less than 6.0.