What do you use for iron? ferrous sulfate

[grod31]

I don't wanna buy that fox farms stuff... too expensive. can we just buy raw ferrous sulfate? if so anyone know a ratio?
Anything anyone can recommend?

​​​​​​https://www.amazon.com/Ferrous-Sulf...sprefix=feruus+sulfatre+powder,aps,308&sr=8-3

 

[f-e]

I got chelated iron from ebay. It cost very little.

 

[grod31]

hmm, well, the iron I sourced is 20% iron 10$/# chelated iron on the bay is 10% iron for 24$?#

 

[troutman]

I have iron EDTA and iron DPTA in one of my nutrient bottles. It mentions it has 0.1% iron in the bottle.

I also have Greensand which is rich in iron.

Rusty nails in your water container is the old fashioned way to get iron.

 

[Creeperpark]

To make iron available you only need to lower the pH in your potting mix. A pH above 7 will start to buffer your iron and make it unavailable because there's no Hydrogen to link with.. Hydrogen has to be there for the Iron to attach itself to before the plant can use it. It's probably there just unavailable because of higher pH. You have to be careful adding ionic compounds like ferrous sulfates because of the Cation Exchange Capacity is sequential and can be broken easily. If one adds too much ferrous sulfate it would block the other trace nutrient receptor sites and cause other problems.

Be extra careful using ionic compounds. Since most ferrous sulfate solutions have a pH of approximately 2, it is recommended that all handling equipment, including mixers, vessels, piping and pumps be made of synthetic, non-corrosive materials of construction, such as PVC or stainless steel. Google

 

[Creeperpark]

If there are not enough Hydrogen molecules to link with, there's no way the trace nutrients can hook up to meet the plant's needs. . https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569912/