u/Ok_Frosting8954

My husband built some awesome raised beds, but unfortunately we have discovered that mulch mixed with soil in them was not a good choice (the delivery on two separate loads of dirt and mulch was pretty pricey, so he had it dropped off mixed in one load). All the plants are stunted and have yellowed.
I’m wondering how much of the mixed mulch and soil we should remove and replace with garden soil? All of it would be too expensive, but not not replacing enough and having another round of failed plants would be a big expense as well.
I appreciate any helpful suggestions anyone may have. Thank you for your time!