It's natural and to be expected, esp with high shrink-swell clays, and non-adapted trees like Gleditsia may or may not care for the cracking.. I can't picture how the soil structure will appreciate the humus addition. It might even get pushed back out in October-Nov.

Dan

So let it be? I actually love that advice! I have RMJs, Lilacs, Canadian Chokecherry, Cheyenne privets and Austrian Black pines planted in the area. I put in 2 Honeylocusts because I like them and there seem to be a lot of them growing wild out here in farm country. I didn't realize they aren't clay fans, which is what we have here. I planted this tree as a 3 ft bare root 4 or 5 years ago. It's about 6 ft now and spreading nicely. I do remember it getting some yellow leaves in the heat in past years. Thank you, Dan. I'll skip adding any more humus.

Its likely black locusts growing wild out there, not honeylocusts. The honeylocusts likely need the clay soil for the moisture. They'll figure it out that only every 5-6-7 years or so will they get such a high shrink-swell, or else they won't and refuse to flourish. Spread the humus around the veggies!

Dan