Slow growth and yellow leaves

[Marthajeep]

So I have two autos at week 4. (Rqs auto gorilla and Dreamberry) The first two weeks looked quite good. Then between the start of 3-4 showed very limited growth and the first two true leaves turned yellow, now I’m noticing the next set are doing the same. At first I thought it was a calmag issue and possibly nitrogen deficiency and immediately started adding it to my water which is ro, probably should have started that sooner. At day one of week 3 I started a half dose of roots uprising grow as a top dress. Now I feel like the top leaves are a bit dark leading me to think nitrogen toxicity, but with yellow leaves I’m at a loss. I started lst at week 3 so I could understand them being shorter, but around 4 inches is a bit ridiculous. I’m growing in ffof with nature’s living soil mixed into the bottom third of my 3 gal fabric pots. I water every 2-3 days as the soil is bone dry by then. I’ve been running at 75 degrees/ 55% rh. Not sure if my light could be a factor, Viparspectra va 1000, but I have an hlg 135 v2 arriving in two days. Any and all suggestions are welcome!

[dphipps1020]

To me it sounds like it may be a bit of an underwatering issue. I could be wrong but I water my 5 gallon pots about every 3 days, 7 gallon every 3-4 days. Maybe someone else has a better suggestion since I'm still fairly new to this. Hope that helps, happy growing!

[dilvish]

If you are using FFO soil it could be too many nutes. Typically the soil will sustain the plant all on it's own for the first 30 days or so. Additionally if the soil is drying up that quickly it may be underwatered. Try increasing the amount of water (water all around the plant not just in one spot) and make sure it is properly PH'd...soil should have water that is 6.2-6.9 for optimal nutrient uptake. Every other watering should be just plain PH'd water to flush out any unused nutes...do not add nutes at every watering and make sure when you do you start at half the recommended dose. If you water every 2-3 days that's twice a week so at the top of the week just do plain water then at the bottom of the week do nutrient mixed water....in both cases make sure you test the PH levels of the water...failing to do this means you are missing an important step. If the PH is too hig or too low then the plant can't deal with nutrients properly.