I was hoping someone smarter would answer but I guess I'll start. Once I knew nothing about fertilizers(and now still know little so that's not saying much) and didn't add them. Someone gave me some mg which I started using and of course everything grew better. I then found the slow release ones and started adding them to everything I planted and things did good with that too. This year after reading on here I am just going to add cow manure to my containers and see how that works.
Ok, hopefully someone who really knows what they are doing will answer, lol.
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