15 plants in all. ..
4 early wonder skunk's at day 24 and 11 early sativa's at day 31.
2 of my early wonder skunk and 3 of my early sativa's grew slow and had some yellow on them,the plants are now healthy but short.(white tray)
I bring my plants outdoors on sunny days and then inside for more light. 18/6 light. When the weather is bad the plants will stay inside. The plants will be taken out in may. May 7th is the last frost for alberta,canada.
Is it okay to use that liquid root stimulator 5.15.5 on my plants?