Tithonia diversifolia stalks are rich in phosphorus and lignin formers

The MONSTER Perennial Sunflower (Tithonia diversifolia) by the east side of my home is now 90% chopped down and chopped up, the phosphorus-rich limbs stacked in my north facing beds in the sun to dry out and die a few weeks before I'll add them to the sheet compost layers I am applying to each bed when the revamp is done. Hopefully I'll have a rainy summer down here in "Egypt" to speed up their decay and add lignin to my soil as it heals and improves. I've learned the hard way over the years that adding them to a mulched garden freshly cut can result in their rooting there!