Need help with nevilles haze.

Im 5-6 weeks out in blooming with nevilles haze but i cant find the sweetspot for the EC level. At vegetive stage i was at 1.8 and the plant was loving it like mcdonalds but when I flipped over for 12/12 cyclus, one day I was checking the EC levels and it was up at 4.5!!
After 3-4 days with only water and a background EC at 0.1 the reservoar was now at 0.7 but the PH was at 4 and im struggling to keep it at a decent level. 1.1 EC is too much and 0.7 is too little, and this plant seems very sensitive. Im using 20l buckets with airstones (DWC) and GHE nutritients.
Anyone have some experience with nevilles haze?
Im not too experienced and I know nevilles haze its not a newbie-plant.
Sorry for my bad english.

With any longer flowering sativa, you just want to aim at keeping the leaves healthy and avoiding deficiencies. It's okay to keep them at a lower EC as long as they don't show signs of deficiency, lots of sativas like less nutrients.

Yea, kinda experienced that too. When I was giving only water the plant suddenly bloomed a little more

It sounds like you got it figured out, just keep the EC between .7 and 1.1 where they like it. That's pretty much the range I grow in.

Tried with .7 now and Ph of 6.2. It was stable for almost 24h and then in 6 hours today EC rised from .7 to .9 and PH dropped to 5 from 6.2. In these 6 hours it drank almost more water than the last 24 hours.
Should I go even lower with the EC? Im using GHE and about 40% of what it says on the nute bottle. This gives and EC of .5 but I add some Pk13 so I end up at .7.

What’s the room/tent temps? What kinda lighting?

At the start I had 240+480w LED's from alibaba but I wanted some more so I put in my 400w HPS with the LED's. Roomtemp is at 28-29 celcius with HPS and about 25-26 with only the LED's.

29c is pretty high. what is your RH% ?

and dont' mind what others do with your strain, your enviro is totally different.

rkymtnman said:

29c is pretty high. what is your RH% ?

and dont' mind what others do with your strain, your enviro is totally different.

Click to expand...

I tought sativas liked around 28-30. Im not sure, the lights are out atm but last I checked it was probably at 40-50%.

tbagboi said:

I tought sativas liked around 28-30. Im not sure, the lights are out atm but last I checked it was probably at 40-50%.

Click to expand...

i grew neville's a LONG time ago and she was a bitch to grow. very finicky.

so yeah, find a ppm that she likes and stick with it. she's got a long way to go still.

According to this I should lower the EC.

tbagboi said:

According to this I should lower the EC.

Click to expand...

throw all your charts away.

you take your ppm meter and you see what your plants need/want as far as ppms.

ppms go up, too strong
ppms go down (alot) , too weak
ppms drop but just slightly, perfect.

as long as ppm is dropping daily (they are eating), and water levle dropping (and you don't have root rot). i don't care about pH.

rkymtnman said:

throw all your charts away.

you take your ppm meter and you see what your plants need/want as far as ppms.

ppms go up, too strong
ppms go down (alot) , too weak
ppms drop but just slightly, perfect.

as long as ppm is dropping daily (they are eating), and water levle dropping (and you don't have root rot). i don't care about pH.

Click to expand...

Ok, good to hear I dont care much about PH either but when it dropped to about 3-4 earlier in the growing stages I was a bit worried. Bc of my high temp I feed them a little hydroguard but the watertemp is at most about 24c.

tbagboi said:

Ok, good to hear I dont care much about PH either but when it dropped to about 3-4 earlier in the growing stages I was a bit worried. Bc of my high temp I feed them a little hydroguard but the watertemp is at most about 24c.

Click to expand...

dont' get me wrong, pH is very important. but try to keep it 5.5 to 6.1 .

in dwc, the plants always have access to the nutes. so as they eat this and that, pH will go up and down.

when ph goes crazy, i would normally check for root rot.

rkymtnman said:

dont' get me wrong, pH is very important. but try to keep it 5.5 to 6.1 .

in dwc, the plants always have access to the nutes. so as they eat this and that, pH will go up and down.

when ph goes crazy, i would normally check for root rot.

Click to expand...

havent seen root rot yet. Ph goes down when EC goes up.

tbagboi said:

Ph goes down when EC goes up.

Click to expand...

if your EC ever goes up, i would add plain water to drop it down by at least 0.1 or 0.3 points immediately

Yea I usually have to to that. When I checked the RH was at 30%. It looks like the plant is showing signs of nutrient deficiency.
The stem is more purple som places. But the weird is that the plant under my 400w hps looks unhealty but under the LED they are much greener and not so much sign of nutrient deficiency.
Should I remove my hps maybe?

Removed the HPS, temp in tent is at 26.7 celcius. Im feedig 0.5 EC but it still rises after a while.

I think I have cracked the code. Even tough the EC rise I probably gave it to LITTLE nutes. I rasied it from 0.6 to 0.9 and after a while the EC had dropped for the first time and the PH rise.