wait - are you putting them in a lawn? that doesnt sound right to me.. i think the grass would choke the little plant's roots and there would be tons of bugs.. also if you have deer they might well eat it whole..
i would at least - cultivate and clear the grass around the plant - and maybe add some protection like a cut-up milk jug or something around it..
just my $0.02 - i wont take my clones out of the greenhouse until they're like 10" - it's a dangerous world out there..