Grass seedlings and frost

In early April I sowed some grass seeds, these germinated around mid April and are growing okay.

The last week of April I sowed some in another area, these started germinating a few days ago and are growing well.

From looking at the weather forecast around a week from now we could be in for a colder spell with perhaps some overnight frosts for a couple of days - should the grass seedlings be fairly frost resilient by then?

I guess those sowed in early April will have roots a few inches long and should be fine, but how about the more recent ones?

The area isn't that big so would it be a good idea to cover them with a light tarpaulin late evening and remove that first thing in the morning? Would it need to be propped up and not touching the grass or is laying it directly onto the grass okay ?

 

Thanks, that's a relief.

 

Another thought - I had intended to sow some more grass seeds tomorrow but the possible cold snap in a week's time has made me wonder if it's viable. Should I still go ahead and sow them tomorrow or hang fire for a week or two? I ask because if I sow them today they will probably start to germinate around the time that a night time frost may occur so they will presumably be at their most vulnerable then.