Marigolds for root-knot nematode control
Does this seem nuts to anyone but me? According to the chart at the NC Dept of Ag Center (link below), in order to achieve results the second year from planting either Tagetes erecta or T. patula marigolds (the only 2 species effective for nematode control), one must plant 300 (yes -- three HUNDRED) marigold seeds in a 100 square foot plot! Three hundred marigold plants in a ten by ten foot area??? In my experience, planting marigolds even one foot apart would result in complete ground cover (and the roots would intertwine below ground), and would certainly take nowhere near 300 plants!!