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When going to replant my boxes yesterday, I noticed so many little white pieces of the fertilizer left. I coundt decide if the chemical had been leached out and to just mix it around..or maybe it still has some punch and I shouldnt put as much new. Does anyone else have fertilizer residue. Maybe I need to change fertilizers.
I scrape out what is easy to scrape out, toss it around the garden, add new mix and add new fertilizer. Earthbox recomends anything from a 5-5-5 to a 15-15-15 . I use 10-10-10 or 4-6-6 in the boxes so, even leaving most of it behind, shouldn't do any damage I would think.
Im trying a new 10-10-10 that is suppose to have micronutrients as well. I think I might do just that. Take out the obvious. If its no good, no harm done..if its still good, the rest of the garden can always use it.
Gardenglory...in my earthboxes I've used ProMixBX which has mycorrhizal fungi in it and Epsoma Garden Tone which has "beneficial microbes" and micronutrients .
Also used the cheapest 10-10-10 and the cheapest potting mix (Lambert: $10.99 for a 3.8 cu ft bale) I could find. And combinations of all of them.
I have been anything but conscientious in removing all the old fertilizer and mixing in more lime to compensate for the increased acidity in peat based mixes as they age.
Didn't see a whit of difference no matter what I did or didn't do. I grow mostly peppers in my 7 earthboxes. In all of them they reached their fruit load (just as they did in the soil come to think of it).
One of the strong points of EBs is the fact that you can plant more in less space which is a great advantage to many of us. When I first used them it was on a 10 x 10 balcony and I was in heaven to have so many varites of tomatos in that space and still have room to sit out there.