I am planting 3 citrus trees.
One problem: the ground is nothing but rock and clay...
I have dug 4 feet deep, yet water continues to sit like its a bath tub. (I fill the hole to the brim, and in 24 hours, its drained about 60%. But I don't think that's good enough).
I added gypsum to the hole to penetrate into the ground. I hammered a crowbar into the bottom of the hole to get another foot deeper, and hopefully get through the clay layer.
What else should I do before planting these citrus? Elevate the rootball off the ground? Hugelkultur?
Thanks for the advice!