don't know if this will work but how about putting compost in a seed tray and placing turf on top so that it can root then when ground is warmer plant it where you want it to be .

Welcome to Goy Woodward - can't think of a better suggestion than Helen's

id be inclined to think it would do best wear it belongs as long as its not frosty. grass is very resilliant bye nature .

It may be best kept in a pot as a 'feature' otherwise it will just merge in with the rest of the grass, eventually.

this is true volunteer .