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In Southern Texas, I have seen a cyan-colored, viscous, sticky fluid sprayed from a huge tank track on freshly compacted ground. I later realized that this fluid most probably contained grass seeds and fertilizer as within days the Texas-typical broad-leaved gras started to germinate.

What exactly is that mixture? Is really glue inside? Is that available to hobby gardners in Europe?

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What you've described is hydroseeding, invented in the US in the 1940s. It's a slurry of grass seed, water, and other ingredients that help "stick" the seed to the soil and in most cases, cover it with a thin mulch. As these sites show, it's certainly available in the UK and EU.

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  • Thanks for the hint, I did not know the official term before. As far as I can tell, hydroseeding is rather a large-scale approach, and not necessarily available for private persons, at least not in Germany. Here, the market is dominated by sod.
    – B--rian
    Apr 16 '21 at 11:45
  • Hydroseeding seems to be the standard for highway construction sites. Any color dye an be used. Apr 16 '21 at 14:22
  • Its certainly used a lot in the usa. My neighbor hydroseeded and it is cool I used to laugh thinking it would never grow. He has the best grass in the neighborhood.
    – JonH
    Apr 16 '21 at 21:07

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