Glyphosate & Cattails. D. Reed you've found that treating cattails works better later in the season because in spring cattails are not transfering a lot of the leaf products to the roots. In spring most of the fluid movement is root to leaf for growth. As the season progresses they begin storing more and more leaf production products to the roots and this is when the herbicide gets better delivery to the root, esp. during late summer & autumn.


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