Which Is The Deficiency?

[Marxib]

Hi,

Can you tell me what is the problem on this baby? I notice yellowing on edges and a general pale colour.

Details:
DWC system
PH: 5.7/5.8
EC: 1800
Age: Autoflower, weeks 2 (low growing)
18h/6h 400W LEDs lamp at 24” height

 

[TerpyTyrone]

What kind of nutrients

 

[Marxib]

Ph perfect trio (micro, grow, bloom) Advanced Nutrients

 

[WestbyGod]

EC might be a little high for so young a plant. I have never grown an autoflower, so do not know how much nutes they can take early on. I grow regular seeds, and try to keep my PPM around 700 to 800, at that young. Do not have EC chart handy so I do not know what EC is at 800 PPM, but I am flowering now, my EC is 1.8 at 1250 PPM.

 

[JWM2]

1.8 ec is 900 ppm.

 

[Phylex]

EC might be a little high for so young a plant. I have never grown an autoflower, so do not know how much nutes they can take early on. I grow regular seeds, and try to keep my PPM around 700 to 800, at that young. Do not have EC chart handy so I do not know what EC is at 800 PPM, but I am flowering now, my EC is 1.8 at 1250 PPM.

EC = PPM x 2 divided by 1000

example 1: ppm 800 x 2 = 1600 divided by 1000 = EC 1.6

example 2: ppm 1250 x 2 = 2500 divided by 1000 = EC 2.5

 

[Marxib]

Ao,
EC is ok or not? Probably an excess of nutrients? I had thought about a deficiency... please help me

 

[chemistry]

Looks like light burn. Hard to tell with the purple.

 

[Marxib]

Hope it’s better

 

[chemistry]

Your plants look fine apart from a bit of yellowing. Pulled this from AN site, just a simple guide, but it will give you an idea of where you need to be.

Follow This Simple Feed Chart Designed by our Research Team
Week 1 Week 2 Week 3 Week 4
Grow (Grow Phase) 1 mL/L 2 mL/L 4 mL/L 4 mL/L
Micro (Grow Phase) 1 mL/L 2 mL/L 4 mL/L 4 mL/L
Bloom (Grow Phase) 1 mL/L 2 mL/L 4 mL/L 4 mL/L

Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7
Grow (Bloom Phase) 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L
Micro (Bloom Phase) 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L
Bloom (Bloom Phase) 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L 4 mL/L

 

[CaliRooted]

I bet it's a ph issue

 

[WestbyGod]

Apples and oranges sort of. EC x 500 = TDS, EC x 700 = PPM. I think in PPM, easier for my brain for some reason. TDS is 900 with EC of 1.8, PPM 1260 with EC 1.8.