lime "raises" ph (water it in to soil, check ph of soil), adding a drop of vinegar to your watering solution and checking ph will lower it (drop, mix, check, repeat; with vinegar, it works fast). And, you may as well use the hps and the cfls throughout the grow, bigger quicker veg, better flower, maybe add another hps?
4x5 Reviewed by 4x5 on . PH question Im on my fourth grow and decided to start troubleshooting everything and taking a more detailed approach to my growing. I have noticed that no matter what I do to my plants (light, air temp, ect) they seem to take forever to grow and my yields are good, but for the most part small. I cant seem to get my buds to fill in densely. Im only growing 2 plants in a 2'deep x 3.5' wide x 4' tall cabinet with a 150 watt HPS lamp for flowering and 3 "150watt" (23watts) CFL blue spectrum bulbs for vegging. Rating: 5