Factors That Determine Grass Seed Germination.




Different seed mixtures germinate and establish at different speeds and the climatic conditions have a huge impact on speed of germination.  If the weather is warm and damp germination of grass seed is much quicker than if it’s cold and dry.  The soil temperatures need to be above 7 degrees Celcius to ensure good germination.  If the site is shaded germination and establishment will take longer.

As a general rule, hardwearing mixtures usually contain dwarf perennial ryegrass and tall fescue, two species that establish quite quickly – will germinate in as little as 3-4 days, but 7-10 days is more the average. Fine leaved mixtures take longer to germinate and to get established. Slender red fescues, bentgrasses and smooth stalked meadow grasses take longer to germinate allow at least 14 days for these to germinate.

If germination takes longer than expected, you may want to ask yourself the following:

  • Did I purchase the correct grass seed mixture?


  • Is the soil temperature cold?


  • Has it rained since I sowed the seed?


  • Did I prepare the seed bed properly. 


  • Did I roll the seed into the soil?


  • Is the lawn shaded?


  • Has it been warm since I sowed the seed?