plants use micro vibes in the roots to find there growing area once they know it by growing huge roots they will start and when she does she will take of double in size each day if you give her 4-6 hrs of dark, i suggest you do. then when lights come on you will see huge growth each day. that is why some do it in 3 stages. solo cup/ 1 gallon/ 5 gallon. so they are always growing. but starting in big pot has its advantages. no transplanting stress. be patient dont try and feed her unless its root nutes right now like small amounts of bloom. yes bloom nutes will help root growth. if you gonna train her be ready it wont be long till she starts taking off.Roots before Shoots
They're developing roots down below. They will focus on top growth in a few days.
you didnt waste anything. when they take off hold on they will keep growing and growing and you wont have transplant shock. so dont worry you did good. here is my C99 in 2.5 gallon pot at day 14 from taking seed out of shipping bag. she didnt do much for 10 days in last 4 day omg in another week she will be allot bigger.Man, seems like I have to post this all the time. Your seedlings are small because of your pot selection. You didn't bother to transplant them into a solo cup or other small pot first. Seedlings expend almost all their energy putting down roots to support the plant. There will be little or no growth aboveground until the roots pretty much fill the pot. So you wasted a week or 2 while your seedling grows a root system much larger than needed. Start with a small pot that will fill soon with roots. Then TP into a larger pot when your largest leaves reach the rim of the pot. Roots grow about as fast as large leaves so when the largest leaves reach the pot rim you can figure the roots are also filling out. After the roots reach the pot you will start to see inch-a-day growth that marks the vegetative state. Good luck, BigSteve.