Coolsville - starting the seedlings in a milder mix will be a good idea.

Wood ash- I had always read that it was pretty hard to control or figure out how much to use, not to mention the "effect" does not last as long ie it leaches out very quickly. I have never used it though, so I have no first hand experience.

Before you use it, it might be a good idea to take a small pot full, water through it like you would normally, and test the runoff to make sure you are in your range. then you can just remix it back in the heap.

Nice work on your last plant, and good look with the juicy fruit! I'm sure you won't be disappointed