Making grass

[RobertInOntario]

Just wondering what the best products are for making grass, weeds, etc. on an HO layout? FYI, I already have my two small layouts covered with Woodland Scenics green ground scatter. Now I'm looking to creating longer/taller grass and weeds, which you often see on layouts in magazines.

Also, are there any household or scrap items that could easily be used or is it better to use products sold at my LHS?

Thanks in advance,

Rob