You can grow as many different strains in the box as you like. But different strains have different growth patterns.
Lets say you grow an Afghani and a NL#5XHaze together.
-You give both 4 weeks of veg, ending with a 100cm Afghan and a 250cm NL#5XHaze
-You give both 12/12 from start, ending with a 40cm Afghan and a 100cm NL#5XHaze
Try to take strains that have simmilar growth patterns or adjust the veg accordingly. In case of the example above:
-You give the Afghan 4 Weeks veg and germinate the NL#5XHaze in the middle of week 4 ending with both plants having roughly the same size.
So you see, its not very smart to put two extremly different genetics together, like a Skunk#1 (8 weeks bloom) and a Dr. Grinspoon (15 weeks bloom).
Even if you have 2 boxes (veg and bloom) keep in mind that the tallest plant dictates how high/low the lamp may hang. If you got 14 small plants and 1 tall one and you dont bend/train/snap the tall one down to the level of the others, the smaller plants will suffer from too little light.
