Allelopathic? sunflower shoot medium reuse?
I grow microgreens and pea and sunflower shoots. I've been reusing some of my growing medium, mostly the old pea shoot medium. Recently I reused some of the sunflower shoot medium. I noticed I have some trays of peas germinating well and some not so well. It certainly could be caused by many things, BUT I am beginning to wonder if the allelopathic nature of sunflowers may be a problem. Do any of you sunflower shoot growers out there reuse growing medium for sunflowers of other things? Have you had good or bad results?