The Average Plant Size White Cannabis Strains of cannabis seeds ranges from 7 to 20 inches. Conditions are everything - a plant won’t grow as tall if it’s stressed, but it will thrive when the conditions are just right.

We can’t stress this enough - growing conditions are important! Here are some factors that can affect the growth of your cannabis plant:

  • The pot size
  • Water pH levels
  • Watering methods
  • Plant training
  • Light intensity
  • Light spectrum
  • Light cycle
  • Ventilation
  • Temperature level