Your plants prefer a neutral to acid soil condition, but now you have water that is alkaline and high in calcium carbonates. To compound the problem, the soil in your new location is alkaline (high pH of 7.5 to 8.0) and buffered as well. Your plants are turning yellow because of lack of iron and have a condition known as iron chlorosis.

Unfortunately, just adding iron products rarely solves the problem. You have to use acidic parent material such as peat moss for your growing mix so that, as decomposition occurs, the plants will consistently have the ideal pH from which to extract minerals and nutrients. Then water with your acid-based water-soluble fertilizer such as Miracid, Miracle Grow, or Peters 20-20-20 every week.

This information is specific for Texas and may not apply to your local conditions. For more information on this topic, choose a related topic link above,
submit a questions through Ask an Expert, or contact your local county
Extension office.