If it frosts after I spread grass seed will the seed still grow?

your seed will be fine as long as it doesnt germinate only when it germinates and the plants are small is when frost will effect it . if its just seed on the ground and it freezes the freeze will not effect the seed because seed has not germinated yet, i dont know what part of the country you are in, but in texas near houston if the night time temps are still below 70 degrees we do not seed with bermuda grass yet, we still seed with ryegrass or fescue, because we have found that a lot of bermuda will not germinate unill the night time temps reach 70 degrees and stays in that temperature range at night and in the fall we change to ryegrass and fescue when nighttime temps stay below 70 degrees

actually if it germinates and starts to grow and then it frosts, you run the risk of it dying. New young grass is very fragile. If you're just now spreading it and the temps remain in that range then it probably won't start growing for another month or so. Throw some hay down to protect those lil buggers from the frost until their roots are established.

No grass seeds including rye will germinate at that low a temperature. It needs to be at least 60F for the seeds to germinate. They will lie dormant and sprout when the weather is warmer, probably the spring.

Yes, it will grow. It's in a dormant stage right now. My dad used to spread grass seed all over the top of the snow. It would come up beautifully.

Freezing Grass Seed

ye its actually better. in the wild, seed freezes in winter then thaws and germinate in spring when temps rise so its all good