Hi there! I have a weird issue here. I'm doing clones, and vegging the plants in 10x10cm Grodan Rockwool cubes for a couple of weeks. These plants are healthy, has lot's of roots and thick stem. Than they goes to the bloom room, where they get 12 hours of HPS light. The problem starts here. I just put them on the surface of coco coir in a fabric pot. The coco is fluffy, airy. I noticed, that many of my plants didn't grow big, the yield is less. The reason is the root didn't really expand into the coco (maybe just a few cm under the rockwool cube), the rootball size is actually stays in the cube. I do dripping system, irrigating every 30 minutes, but just a very little. Always have 15-20% drain. My EC is 1.7, Drain EC below 2.0. pH 6.1 - 6.3. Why is it like this, why the roots doesn't expand into the coco? About 50% of my room is like this. Please help. Thanks!!