No need to go to a lot of work - just a liberal dose of high N fertilizer will counteract the wood mulch in the soil. Lawn fertilizer, blood meal, Miracle Gro or even urine will work just fine.

Blood meal, fish emulsion or diluted urine.

Don't overdo, you can have too much N also. Soluble fert at the concentration on the label, poured right at the plant roots, will have immediate effects. You could follow up with solid/granular to treat the whole area.

I've got fish emulsion and osmocote. Thanks!