Question
Is there such as thing as plants getting too much iron?

Answer
Greetings, Reg!

The answer to your questions is, well, yes. While iron is important for the chlorophyll formation (plants get their green color from it) snf to assist them with photosynthesis. It also is involved in the crucial process by which plants pull water out of the ground.

I personally have northern bayberries (myrica pennsylvanica) which thrive in acid soil.  My soil is very alkaline, and from time to time the leaves turn a bit yellow. I use a product call Ironite to correct it.  But bear in mind that I am correcting a clear deficiency; the leaves on my plants turn yellow with green veins.

Too much iron can cause problems, because an excess can displace zinc and copper.  And without zinc and copper, plants cannot grow.

If you are growing an acid loving plant in alkaline soil, iron can be very helpful.  But it shuld be used in very small amounts.

Is this helpful? Please feel free to write again if you need more information.

Regards,

Donna