Is this nutrient burn?

[Ccpp]

Hi all
I recently have been watering more and adding less nutrients.
2 days ago i did a water with added nutrients as per instructions and had leaf problems and need sum direction on diagnosis and a remedy?

 

[George Mc]

Please take pictures under natural light. Also look in my signature and click on how to ask for grow support. Come back with that information

 

[Nunyabiz]

Hard to tell in those pics but does appear to be nutrient burn.

 

[Ccpp]

Thank you for the response
I have attached some more images.
Here is further details on the setup

Its a mix of indica and Sativa plants effected.
5 plants
End if 6 week flowering
Soil
2x 600 watt HPS
PH 6/7
Humidity 58%
Temp 20 deg
Indoor
Adding nutrients every 7 days
Watering every 3/4
Aircooled
Thank you for your time.
How would one remedy this problem

 

[George Mc]

Your pH should be between 6.3 and 6.8. Does your soil have nutrients in it? What is your feeding schedule how much are you feeding percentage wise of recommended dosages? Do you water every 3 or 4 days or do you water because the pots are very light?

 

[Ccpp]

Hi
Thank you for the feedback
I have attached a picture of the nutrient i have been adding sensi short flowering powder feeding.
I have been adding advised dosage every 7 days.
The current PH is at 6,5 but ranging between pots.
I water when pots are light and dry 6cm into pot.

 

[Weaselcracker]

I don’t think they’re overfed, yet. A little high in nitrogen maybe. Mostly it’s deficiencies. I’m not familiar with those nutrients but to look at them- that nutrient isn’t a very good NPK balance for flowering.
From what I see online they make a PK booster that you’re meant to be adding as well. That would hopefully fill in the missing nutrients. I seem to have lost track of the page where I found their feeding schedule - but I think there’s a calcium supplement they say to use the whole way through as well- have you been using that?
I suspect that using those two additional things will fix your issues. You may or may not run into overfeeding since often listed schedules are a bit too strong.

 

[George Mc]

All right let me do my best here. I'm fairly new to the growing game I'm on my third grow. You should be using nutrients specific for cannabis. The one in the picture shown is feeding too much nitrogen in the flowering stage. When I ask about pH I mean to say mix up your nutrients in a jug then adjust your pH close to 6.5. Then you water the plant until you get about 20% runoff. If you're going to finish this grow with that powder I recommend you back off on how much you use per feeding. If you are following the instructions to the letter you should maybe use 50% or 75% from now on. When I add liquid to the pots I water / feed / water / feed and so on. You might be watering too often if you're only checking the first inch of the soil. Wait until the pot feels very light and then water or feed. Look in my signature on how to water a plant in soil.