I am in the process of attempting to establish a few fruit tree guilds. There is about 8-10 of soil, followed by pure clay. I think we could have 10 year drought and my soil would still be wet. So I started digging a small
swale to take
water to other parts of the property as well as a nearby rain garden. While digging I hit a lot of cicadas arond 6-8" deep. Turns out there is a 17 year brood emerging this spring from right under my planned guilds. To me, this translates as a LOT of free aeration in my otherwise solid clay. As they emerge, I want to make the most of their tunnels before they collapse and I miss this rare opportunity.
I'd like to scatter some kind of seed that germinates very quickly around early May (zone 6, Chicago) grows well in wet clay soil, and quickly puts down deep fiberous
roots to take advantage of all those cicada burrows.
Any suggestions?