I have 3 plants. 1 female 2 unknown and they are in the second week of flowering. They are growing in a dwc with netpots, hydroton, and rockwool. CFL lighting (my one female is about 3ft. Its taller than the other two plants). I used a different nute brand during veg and switched over to FF trio beginning of the 12/12 cycle.
I am using FF trio for my DWC grow and the plants looked like they were nute burned after I followed FF suggested serving size for the first week of flower. Now I have the res filled with 6 gal of water and 25% of the serving.
So more info:
FF Big Bloom NPK is .01-.3-.7
FF Grow Big NPK is 3-2-6
FF Tiger Bloom NPK is 2-8-4
FF suggests 3 tsp/gal big bloom, 1 grow big tsp/gal, and 1 tiger bloom tsp/gal for 12/12 week 5 with a ppm range of 1120-1260. They say feed twice/week. Each serving is about 600 ppm in 6 gal of water. I did that and ended up with what I believe is nute burn but there are clearly some leaves with mg deficiency signs. I ordered botanicare's cal-mg plus and it should be here by next week. I believe they are in a lockout and are not eating anymore based off the ppm rising and constant ph (but its only been two days).
My question is if they were nute burned or over-fertilized how long does it usually take for them to start eating again? My ppm after feeding the 25% serving was a 340 at a .5 conversion factor and my tap water has a ppm of 140. So I have noticed in the last few days that the ppm is rising (now at a 420) but the PH has been a stable 5.8-6.0. So it seems as if water is evaporating or they are drinking water and not eating any food. My temps are 77 f for the room and the res is 68-73 f sometimes cooler.
The growth seems to have slowed but the newest growth seems healthy. The fan leaves immediately below the new growth have brown tips/saw blade edges. Some of the tips have curled upward while others downward and a few others are twisted as well as curled.
I am not using any of their additives just the FF trio. I am in week 1 of flowering. I noticed they drank a gallon in the past two days so I added 1.5 tsp tiger bloom, .5 big bloom, and .5 grow big to 1 gal of water. It brought the res ph to a 5.6 and a ppm of (443-140=) 303 I figured adding a little more tiger bloom for the P since I wasn't using their additional products like open sesame.
Here are some pics: THE YELLOW IS FROM THE CFLS if i turned them off it was way to dark to see.
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I appreciate your time and help. Ill pay it forward!