ANIMAL COOKIES

i would recomend maybe 25% and keep it 12" at seedling to keep from stretching then up it 50-75% @ 18" veg and then crank it to 100% for flower and use the photone app or get a par meter (if you have the money) to check ppfd and adjust height

Usually when the fan leaves reach the edges of the cup, when you have to water every day, or you start seeing roots come out the bottom its time to transplant. As far as soil i would go with foxfarm happy frog for your 1st transplant. You can go directly into your final pot 5-7 Gallon but if You choose this method be careful not to over water , you just want to drench the center of the pot( Use this method for auto-flowers) The 2nd method is to go from solo cup to a 1 gallon pot and down the road switch to the slightly stronger fox farm ocean forrest soil in the 5-7 gallon. I prefer this method because everytime you transplant you have new soil that will feed your plants and keeps you from having to feed for about 30 days. Also when transplanting sprinkle mycorrhizae on root ball and in the hole

Its more then likely one of 3 things, all of which are pretty quick fixes. Overwatering, ph imbalance, nutrient deficiency. You may want to up the nitrogen a bit on your next feed and make sure that the ph is between 6-6.5 Hope this takes care of it for you

You are ready right now. Typically around 2 weeks and when she has 4-5 nodes shes ready to go. What you want to do is look for the main stem and go to the top, there will be the main stem and 2 shoots(one on each side of the stem) you want to cut the stem directly above those 2 shoots. Be careful not to damage the shoots because those are going to be your 2 new main colas.