My PH- is P based, and though every nute they have (minus the Big Bloom) is acidic, I figure the Sledgehammer is probably the least likely to throw my NPK and micros out of proportion. Really trying to avoid giving any additional N if possible at this point as from the way they look they really aren't hungry for it. I feel like adding the yucca shouldn't do any harm, I know
@WildBill for sure had mentioned using yucca at every water and AFAIK its a non plant food ingredient.