I am looking to grow sterile male rye grass, and from the looks of how to it happens it is from a copper deficiency in the soil. But I can't seem to find a way to create a controlled way to deplete the copper in the soil. Do you have any suggestions/links?
Certified GKH Gardening Expert
Once excessive amounts of copper are found in the soil, it is very difficult to remove it, let alone keep it under control. Copper has low solubility, which enables it to persist in the soil for years. That being said, tests have been conducted with certain plants, like mustard and arugula, for removing copper from soil and have shown some promise. Here is more information that might be helpful: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/copper-for-the-garden.htm