I'm satisfied with the growth rate this week. they all seem to be enjoying the myco nutrient in water daily, twice this week they were fed with hydrated kelp meal and alfalfa meal. my pepper plants have flowered and I pollinated them also.
If your plants are already at 18in you should switch soon if in a tent. This is because plants will double to triple in size once switched to flower and you need to maintain a certain distance between your lights and your canopy.