Cool-season grasses usually start growing two weeks after planting, while warm-season grasses can take up to 30 days to germinate. Cool-season grasses usually start growing two weeks after planting, while warm-season grasses can take up to 30 days to germinate.
substratum - an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population; the Celtic languages of Britain are a substrate for English
substrate-any stratum or layer lying underneath another. substratum. stratum-one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock).