“Do you shred the cardboard?”
No, I just cut it into pieces that fit around the tomatoes and the cages. It haa helped a lot. Diana in Wisconsin gave me several suggestions for mulch, cardboard was the easiest for me. She also suggested regular fertilizing and using a copper based fungicide. After I took her advise on mulching, fertilizing and using copper spray, I have had barely any fungus in the last two years.
She also told me to never water tomatoes from the top.
Thanks Diana!
Thank you very much for the information. I’ve already started putting cardboard down. Only watered tomatoes from the top twice this season and I’ll never do it again!