Hi
@amberjewel! I also have clay soil. I always say I could make bricks out of it, lol.
I use a mix of 45% mushroom compost, 45% Evergreen top soil (from Lowe's, it has pine fines) and 10% coarse sand. (Don't use "play sand" as it can mix with the clay and make something akin to concrete.) I dig out the majority of the clay and mix in mostly new soil for new beds. Amending with Milorganite and alfalfa are both good ideas.
Soil test - The best thing to do for your soil test IMHO is to send it to your local extension office. Tell them you are growing CORN, for the best results. They can give you recommendations as far as what to add and how much.
A kiddie pool is a must for the true daylily addict!
Not sure about the coconut coir, hopefully someone else will chime in on that.
