Can Liquid Fertilizer go bad?

[Ray]

Good point about the EDTA used to chelate the iron, but it's a pretty stable chemical, so unless you store it warm and exposed to light, not much should happen.

Some one at Clemson did a study on that, and showed that dark storage = no degradation, while when exposed to 3500 fc of light, 90% of the FE-EDTA degraded in 10 days. Doubling the light intensity doubled the rate, as did increasing the temperature from 68°F to 104°.


I have not heard that about the MSU formulas, but have two comments:

1) The minerals used in them are not unique, so the same could be the case with others.

2) Why would anyone store any fertilizer powder open to the air?