We had a horrible spring in our region last year and my seedlings resisted through 40/45° rainy weather for 12/14 days with a 75% success rate even though I thought they were all goners, and that was in early April! i they resist and establish themselves this early they will be fatties!!!!!!!!! Once they get past the critical stage of embedding themselves into the ground there ain't no way to stop em, early March, compliments, you must be in the southeast/west or Cali... let's hope they all pull through! Shit... With temps in the mid 70's during the day they should be more than fine, just a little growth stunt thanks to the 40's, just hope the weather holds out.