Nutrient issues help, I'm at a loss...

[Art_Vandelay]

Hey guys I have joined up to get some help with issues in my new grow. The plants are Chemdog strain and ever since ive had them I have been unable to source the issue causing the yellowing and dying of leaves.

Water PH in 6.4-7.0
Water PH in runoff 6.0 - 6.3
E.C in 1.7
E.C in runoff is 1.5
Nutrients used Goliath Veg Accelerator ( I think its crap and maybe issue)

I have a Bluelab E.C and P.H meters.
My water here is very low E.C and does not even register on meter. So i have been thinking mineral deficency?

Any help and advice is very much appreciated, thanks for your time :)

 

[Aqua Man]

Kinda thinking to much light and watering issues just jusging from the pictures.

More details on the setup, environment and watering practices

 

[Art_Vandelay]

Thanks for the reply, the setup is:

1 x 400w MH
1.2m x 1.2m grow tent
Temps always between 20 - 27 degrees celcius
Humidity at a steady 50 - 55%
Light is 500mm away from top of plants
Water every 4th day when the pots are feeling "lite"
I have kept track of weights and plants neither get to wet ot to dry and have excellent drainage.
Soil used was Canna Terra Professional

Cheers

 

[Aqua Man]

Yeah that like should be 2x that distance. That’s probably a large part of the issue

 

[Art_Vandelay]

Really 1 meter away from the plants? All other advice says 12 - 20 inches which is roughly 500mm. I can hold my hand under lights at plant height and not feel any uncomfortable heat at all.

The whole plant also has the "issue" not just tops so light burn is not something im picking.

 

[TryingToGrow]

Soil looks really wet

 

[Art_Vandelay]

Soil looks really wet

I think its just the type of soil as stated above. I have been keeping track of weights and they are not over/under watered.

Cheers

 

[TryingToGrow]

I have no idea but I don’t think a plant that size in a pot that size needs water that often normally. I could be wrong, probably.

What is ec before nutes?

I just had a plant looking the same, haven’t watered it in like a month and it’s looking better.

 

[Art_Vandelay]

I have no idea but I don’t think a plant that size in a pot that size needs water that often normally. I could be wrong, probably.

I realized the pots were to big back when i transplanted (silly mistake i regret).
When i water I use 2ltrs and i get about 500ml runoff maybe a bit more which brings the pots to a weight of about 7kgs.
The "dry" weight of the pots and soil etc is about 5.5kgs and i have been watering them at around that weight. The top does dry nicly and i have a fan providing good air circulation.
I could use less water but I need to have run off to check PH and E.C

E.C of water is very very low where im from. It doesnt even show on meter which is why I have been leaning towards using Calmag.

 

[Aqua Man]

12-20 inches for MH nope but yeah thats up to you

 

[Art_Vandelay]

12-20 inches for MH nope but yeah thats up to you

I hear what your saying but with my hand under the light is not hot at all and also my last grow a few years back used 600w MH in 2mtr x 2mtr tent with same heights used and no issues.
Just looking at the leaves covering the whole plant and all the charts showing different leaf symptoms had me leaning deficencys.
I'm sorry im not trashing your advice i very much appreciate it :)
Can you point me in direction of correct light heights information?

 

[Art_Vandelay]

Ooh and also they normally dont look that droopy, those photos were just as the lights came on 18/6.
Looking at them now they are reaching up to the lights.

 

[Shayne010944]

Maybe need cal mag .

 

[Shayne010944]

Because your starting water is lacking the minerals like you said

 

[Art_Vandelay]

Maybe need cal mag .

I have some ordered so we will see. I have just been bouncing between different things and getting myself all confused and frustrated.
The last grow was SO much easier than this..... haha

 

[Shayne010944]

I have some ordered so we will see. I have just been bouncing between different things and getting myself all confused and frustrated.
The last grow was SO much easier than this..... haha

That’s why I switched to hydro wit h automatic watering intervals was a lot easier

 

[Art_Vandelay]

12-20 inches for MH nope but yeah thats up to you

Ive raised the lights to 800mm above canopy so will keep an eye on things and also monitor the temps at plant level. The plants seem very short and bushy :(

Here is some of the new growth coming through after i upped the nute levels over the space of a couple weeks. Another thing that lead me to beliieve I had a deficency.
I do realise the old brown leaves will never recover.

 

[Aqua Man]

Ive raised the lights to 800mm above canopy so will keep an eye on things and also monitor the temps at plant level. The plants seem very short and bushy :(

Genetics and blue leaning spectrum

 

[Art_Vandelay]

Genetics and blue leaning spectrum

Here is the light spectrum from the bulb im using. Also here is some grow data i have from one of the plants. I also have data from the others.

 

[Wieczorekfloorz]

Art try some recharge be or comeback by Fox farm. By it self no other nutes.