raimeiken,
i have done lots of foliar feeding, drenching with micro-nutrition, and chelated Fe, in the past....when i had most of my plants in a location with city water. (now that I have acidic well water, it is not required as much, thank goodness!)
all the rare myrciarias seemed to hate city water (except the grimal and vexator)
also, my plants are older now..and older plants can deal with stress better, showing more resistance to nutritional deficiencies.
I used an organic product called TurfPro (or AgriPro), and also would use just about any micronutritional formula....KeyPlex is expensive, and effective...I've had good success using even using the stuff from Southern AG (for citrus?).
just don't over do it with the micros! An overdose of micro-nutrition can be way worse than being nutrient deficient!
Adam, What fertilizer do you recommend for jabos?
I personally use espoma products (holly tone in particular)...but be careful, using too much can easily kill a plant.
I just fertilize using a bit less than what the bag says, and I do it more often...
so light, frequent feedings is ok...(like 3-6 times per year, depending on the size of the tree, and how much fert you put down)
high nitrogen fertilizer on a Myrciaria is like playing with FIRE!
interesting, that particular one is formulated for acid loving plants. I should give that a try since my conditions here are very high PH soil and water.
Do you do any foliar feeding?
I started foliar spraying with Dyna-gro's foliage pro with some iron chelate in the mix beginning of Feb, and when the new leaves emerged, they're much bigger than the older foliage. I spray every two weeks with it and do a soil drench the weeks in between with the same stuff including some humic acid.
in my experience, drenching with chelated Fe is the most effective treatment for chlorosis.