In order to ensure maximum health, it is necessary to transplant marijuana plants once or twice at least possibly in a starter cup. By checking the size of the plant in comparison with the cup it is growing in, you can be able to judge when to transplant it (when it becomes taller than the container). If it is root bound, then you will need to break up the roots a bit before planting so that they grow unrestricted. Root bound means the roots are circling the plant and or coming out of the ...