Email features have been reactivated 4/17/24
Here is one of their products. Dr Iron seems to go the citrate chelate route. Does it work in high ph soils? Lo ph soils?hhttp://www.organic-gardening-shop.com/agorganics/Images%5CLABEL_FILES%5CMT7262LABEL.pdfIt is from California..... so may not apply to hi ph Florida soils
I'm not familiar with that iron. What I can tell you from experience is that in high PH soils the plants take up the iron but for some reason they can not use it. I can not tell you why, I'm not a chemist or agronomist, I just grow them.I have had sick trees looking like iron deficiency but when I do the leaf test the iron and all other elements are OK. Then I apply sequetrine 138 or generic equivalent and it gets green quickly. Since then that is all the iron I use. I apply it through my irrigation system. It is expensive over $8.00 a pound. In the supply place it comes in 5 lbs bags. To me is an expensive item I used like 50 lbs plus a year. You may find someone that sell less.
This is from the label:Sequestrene 138 Fe Iron Chelate is a source of iron in a form readily available to plants. It can be applied either as a soil application or as a foliar spray. Sequestrene 138 Fe is effective over a wide pH range, including soils where pH is 7.0 and above. Rates of application will depend upon the severity of deficiency, but should be kept within therecommended range for each crop.For the whole label: http://www.gvwest.com/labels/SEQUEST475.pdfFor me I like soil application, since I have micro jets is low cost on the application side. Foliar is a bit more complicated. This is a profesional product used world wide in agriculture. FYI this will stain really bad. even a 1/8 oz in a gallon of water makes a very dark deep brown-red solution.
http://www.irrigation-mart.com/Documents/Chemicals/ferriplus.pdfI came across this product that looks similar to the sequestrine 138, they sell it in 1 pound jars....it comes out to cost more by $10 if you use 5 pounds in a short time frame. Any thoughts on this one??