Do not top autos.Plants our just at 3 weeks old. Last few days they really seem to be putting on height and width. I have been reading up on topping. I have no issues with height 8 ft tent with light at max height still leaves me with 6 ft of clearance from top of smart pots. Plants are all autos. Should I top or just let them go?
The yellowing in one part of the plant can be caused by a molybdenum deficiency.Seedlings our about one week from popping out of rapid rooters. Planted directly into the final grow pot which is a 5 gal smart pot. Using a pro mix all purpose mix with added perlite and vermiculite. Just using well water with no added nutrients so far. Water is natural ph of 6.7 and has a ppm of 300. I am running a 600 watt mh light with cool tube. Tent is averaging about 73 to 78 with a humidity of 49 to 60. Plants seem to be healthy so far. One has a slight lighter tint towards center of plant and leaves but still putting on new smaller leaves with no issues.
Jesus that's a lot of light!3 plants under 600watts shouldn't be to bad, I use two 600hps for 4 plants in a 4x4 room with good results.
This is really good advice for a newer grower to minimise chances of f-ing it up.For Autos, always start them in the pot that is going to be their final home, otherwise, you run a very high risk of stunting their growth.
Also, they are a lot more sensitive to nutrients, they can be over fertilized very easily.