Mix automaticas OJITOS ROJOS "POWER MIX"

Oh forgot to mention you want to adjust your light till your in the 400 to 600 PPFD for your light and 15-30 for DLI those 4 parameters will get you the best result which include your heat and humidity

Your starting in a large pot, normally roots like a little resistance in order for them to push up in my experience, you have very healthy plants and yes heat and humidity play a crucial role in plant development but the plants are very versatile and can thrive in many conditions and climated but they really thrive in the best conditions which had to do with your VPD the best user friendly app you can download is Tent buddy and you can can check your PPFD and DLI which are all light intensities and adjust using the calculator and the app also has a VPD calculator which is a environmental calculator to get you in the proper ranges of heat and humidity and in the veg stage you want to be at 77F or 25C and 72%RH to get you into a 0.89 VPD which is in the optimal range...

Too much light and too much heat can stress and slow growth. Looking at the information you provided in your diary and pictures. You have a mixed lot of seeds. 86F is a little high in temps. I like to be 75F-82F myself. Autoflowers can be all over the place in size and structure. With the limited info i would say its the genetics over light and heat. Remember that for the first 3-4 weeks they are establishing their root system. The growth will pick up in the next 3-7 days.