I don't know where else to post this question except here as you folks are so smart about this sort of thing. I grow almost 200 daylilys in containers here in central FL (yes, I need to change my handle & info). We are highly susceptible to crown rot with the heat & humidity & been using a product called K-phite to prevent it. This is what the label says:

To avoid undesirable copper phytotoxicity, do not apply K-PHITE foliarly to plants treated with copper based compounds at less than 20 day intervals unless instructed to do so by your consultant.

When I google 'miracle grow copper', turns out copper sulphate is listed as an ingredient. Safe to assume this is a 'copper based compound'?

I've been doing soil drenches, not foliar applications. Would that make a difference? I know some of it gets on the foliage, hard not to, as well as the Miracle Grow.

I had a very bad bloom season here & trying to figure out what the problem is. I'm using Al's 511 with tremendous success (holds water by the roots & drains water quickly from the crown, perfect for my situation!). I'm blaming the chemicals & fertilizers for bleached out flowers & lack of bud counts, etc. I've been using Miracle Grow on a weekly basis as well as watering every single day, & yes, pooling the water on top of the container too so they are very well fertilized & watered.

So could it be the combo of K-phite & Miracle Grow?