First grow ever

You could use either or , at the end of the day it matters what the PH is like you always want to correct it to the right PH for medium . I can see your medium is soil based on that information your PH should be anywhere from 6.5 - 6.8 in order to prevent any nutrient lock outs . If your unsure what your PH is your local hydroponics shop or amazon will have them pretty cheap as well you can get the general hydroponics test kids for like 8-12$ and this kit will help you keep your PH range in check as well as you could go a little fancier and get a PH pen these usually will have a digital read out and they are very accurate . They range in price anywhere from 20-100$ depending on the brand . In order to correct your PH you will need products such as PH up and PH down they are very cost effective as you only use drops at a time to adjust your PH because of their strength . Other then that both waters are pretty much the same , you might get different minerals in the rain water then you would the tap water but its pretty much the same except i might suggest leaving the tap water out with no nutrient solution in it for 2 days so the chlorine can evaporate . Your in good shape and well on your way to having some kick ass young ladies ! I hope this information helps you ! -Happy Growing!

think of the plant as a rocket for space, it needs to thrust really hard, yet looks "slow" on the ground, as it picks up speed it's still thrusting really hard, then for the even "quicker" flower stretch that's like when the rocket is already in space no gravity holding it down. My point is, this is how plants grow, slow at first then really quickly, especially autos... when you're watching a plant grow there's going to be a fair amount of boredom lol, but if you compare your week 2 pictures, this looks right on track, keep doing what you're doing ! hope this helps 🚀

Hi @WillyWonka! Honestly no one can tell better than you (with the help of a magnifier/microscope) and your pictures are a too dark and far-off to analyse the trichomes. Pistils can be a clue, if you noticed that new pistils have stopped appearing and old pistils have almost all turned red and curly, but the best way to ensure it's the right time is to look at the trichomes with a magnifier/microscope. Clear/Transparent/Skinny trichomes mean it's too soon, Milky/Cloudy/Fat trichomes mean the harvest window is open, Amber trichomes mean the harvest window is ending, and THC is degrading. Looking at your last pictures, I think you're very close, maybe 7-14 days, but you rather double-check everyday (even twice a day) with a 2$ hand-held microscope to ensure your buds are fully ready. Hope this will help, keep us up-to-date and happy growing! 👊