Plants growing slow (I think)?

Your plants are looking great, nice color and no deficiencies. The only thing that you can improve is to stop watering directly near the plant. Instead of watering around the roots you better water on the outside of the pot. Or from the bottom (put the pot inside a bowl with 2 inches with water for 1 minute a day). When you do this you force the roots to search for the water and while doing this the plants create a larger and healthier rootsystem. Plants got the same volume above the ground as under the ground. So the larger the roots the bigger the plant. When you keep watering near the roots the roots become lazy and do not need to grow because you provide everything they need nearby. So let those roots work and cannabis roots love to search for water! Enjoy your grow buddy!