Colorado—the word means “red” in Spanish. And Colorado’s soils are often reddish, due to the abundance of oxidized iron. Here in Colorado Springs, Garden of the Gods (right) attracts visitors with bright orange sandstone monoliths. Further north, Red Rocks Park and Amphitheatre is part of the same formation. Our well water has so much iron in it that our white laundry turned pink—we had to install an iron-removal component to our water system.
So, with all this iron present in our soils, why do so many plants here suffer from a deficiency?