My very first Grow

If you see any mistakes or you've suggestions/tips and tricks, please let me know! Thanks! ----------------------------------------------------------------------------------- Day 50 - 56 (06/17 - 06/23): Still have the problem with yellow/dying leaves at the bottom. I thought it is a calcium deficiency. Treated with extra CalMag (0.8ml like recommended) every day shows now effect. My guess was/is that my pH is off, so for the last few days i pH corrected water and water+nutrients. What i learned: My pure water has a pH around 7.3. (4x per week 1l) Water with all nutrients is around 5.5. (3x per week 1l) I've corrected them all to around 6.3-6.5. Or maybe this is normal because she thinks it is fall? Guess I'll open a question and let me help by professionals. In other news: This week was very hot outside. Up to 35°C (95°F). My tend peaked at 28.1°C (82.6°F). Otherwise she looks and smells pretty good. Stats for the week: Humidity: 41% - 71% Temperature: 18.2°C - 28.1°C (64.8°F - 82.6°F)