I had a dozen or so seedlings, in pots that were showing signs of iron deficiency. I crushed some hematite and mixed it with two mL of molasses and about 1 cup of very hot water and let it steep. Then I sprayed the foliage at night (I read most chelates are photosensitive).
The next day there was no dramatic improvement, but the second day they really did look better.
Oh, and it was my own fault they were getting chloritic. I've been experimenting with sifting coarse limestone and adding it as a soil amendment and I guess I got carried away when I was potting up seedlings.
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