[Paul R.]

Thanks!

For “All” (except Diana who said she didn’t know), my question remains: Does hard water reduce Roundup’s efficacy and am I better off mixing with distilled water, municipal water, or perhaps rain water*?

It’s not too hard for me to imagine a salt combining with other minerals in well water. I’ve read Roundup in soil basically binds to small soil particles, and Diana confirms that Roundup loses its punch in soil in a week or so. The rate of the process is “interesting” — not fast, but not taking long periods of time, either...

*I can collect plenty of rain water easily, especially the next 3 days - hahaha! We’re gonna have 3 days of the soaking that started this morning. I’ll bet the spot we watched the eclipse from yesterday will be cut off by running water by Thursday.

[MomwithHope]

Paul I really don’t know. I guess the rain water would be a good choice.

[Dust in the Wind]

Yes. From a Bing search. (does hard water decrease the effectiveness of roundup? )

The positively charged cations in hard water bind with the negatively charged glyphosate molecules, resulting in less-effective weed control.

Don't Let Hard Water Make Weeds Hard To Control - USGA www.usga.org/content/usga/home-page/course-care/regional-updates/central-region/2018/don-t-let-hard-water-make-weeds-hard-to-control.html

www.usga.org/content/usga/home-page/course-care/regional-updates/central-re…

How much? Needs more personal research...

[metmom]

I had not heard that but it’s interesting if true.

I’ll have to start collecting rainwater, too. Distilled water ought to work as there are no minerals in it.

[Albion Wilde]

Does hard water reduce Roundup’s efficacy and am I better off mixing with distilled water, municipal water, or perhaps rain water*?

Most of the packages of lawn chemicals have an 800 number you can call for precise information.