Msmity
In Chicagoland, the river birch would be the best choice among birches. It handles heat better than the northerners paper and yellow birch, both of which are decidedly happier in cooler zones.
River birch can suffer from chlorosis if your soil pH is too high. Soil sulfur, which is simply granular sulfur, can be applied quite heavily, and then covered with mulch. Bacteria in the soil slowly convert this to sulfuric acid, thereby lowering the pH. This works well, but may need to be redone occasionally. The material is inexpensive, and IMO, a better choice than the commonly recommended aluminum sulfate.
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