4AM, Sour Stomper, and GSCE outdoors

Slow growth this week. Temps for the past week have sucked for growing, and are staying in the low 60's during the day, 40's at night. I think this is holding the growth back, as it feels my 2 week old seedlings are much smaller than others I see on this site. Otherwise...all seedlings look healthy and green...just small. Did start giving all 4 plants a dose of Neptune's Harvest fish fertilizer. 1 fluid ounce per gallon is the mix ratio I'm using. Will continue this every two weeks. Hoping for temps in the 80's this weekend to jump start some growth!