What can I do?

Hey guys,

Growing a Northern Light which just reached the end of the 10th week of growing (from sprouting)

She is under Mars hydro TS 600

She does not seems happy at all, started yellowing couple of weeks ago and it's getting worst day by day.

I water her every 2 days (it's a small pot, 5L) and I give her feed 2/3 times a week, advanced feed for flowering phase: https://www.hydroponics.eu/adv-nutrients-sensi-pack-ph-perfect~24006.html

• It can be N lack, but i'm using nutrients and there should definitely enough N
• It can be lack of Magnesium: the nut i'm giving have 0.6 percent of Magnesium and 3% of Calcium, anyway i bought EPSOM salt which i gave her yesterday (I also made a spray which i'm using on the leaves)

She had a mild thrips infestation, treating here with Neem oil and it seems it's going better.

Do you guys have any idea about what's happening to her? Also, apart from the yellowing which is pretty bad, the buds looks quite small and light to me, is it just an impression?

Thanks!

what ph is your feed and are you in soil or soillless?

Soil, my feed should be PH controlled, at least it is sold like this!

sorry im not really an advanced grower but ive been reading those 2 articles and they are all about ph. your picture shows the whole leaf is yellow. i dont think your plants are taking up any nutrients at all.

Any idea what's her issue, or issues, N and Magnesium, is my understanding based on the links, but it does not make sense..

do you have a ph meter or strips?

Looks to me like a magnesium deficiency, with lockout. I would flush it good with plain water, then add epsom salt to your water at 3/4 tsp. per gallon.
But there are more knowledgeable growers than me, so see what others say.

Have you been using calmag? Even with, it often won't supply enough magnesium.

Boru420 said:

sorry im not really an advanced grower but ive been reading those 2 articles and they are all about ph. your picture shows the whole leaf is yellow. i dont think your plants are taking up any nutrients at all.

Click to expand...

Yeah but why!! XD

I don't overfeed her, humidity is under 60%, not sure why should she be in lockout, and how to bring her out of it!

what brand, you always have to check ph, or you have over fed and led to lockout

manfredo said:

Looks to me like a magnesium deficiency, with lockout. I would flush it good with plain water, then add epsom salt to your water at 3/4 tsp. per gallon.
But there are more knowledgeable growers than me, so see what others say.

Have you been using calmag? Even with, it often won't supply enough magnesium.

Click to expand...

Just got it delivered, I think i'll wait a bit to give it to her, cause i already gave her EPSOM yesterday

and maybe even calcium def as well.

kovidkough said:

what brand, you always have to check ph, or you have over fed and led to lockout

Click to expand...

https://www.hydroponics.eu/adv-nutrients-sensi-pack-ph-perfect~24006.html

Unfortunately my PH reader broke a week ago, and i did not buy a new one yet.

Before breaking soil was 6.4

ok not to sound like a shill but this is exactly why I shelfed my ph perfect shit

AN is terrible in soil and will burn ur babies
I got another brand that is vegan in my journal I wont mention name again not to sound like a shill but flush your medium and the AN down the toilet

Man thank god I havent had to PH anything in my soil in the last decade...

also it never stayed stable and had me chasing my tail

http://www.integratedhealth.com/supplements/phtesting/ph-paper.html these are cheap and it reads 5.5 -8 perfect for cannabis

see the difference. the run off was 4.0, i had to transplant the lady into new soil but she lives lol,

kovidkough said:

http://www.integratedhealth.com/supplements/phtesting/ph-paper.html these are cheap and it reads 5.5 -8 perfect for cannabis

Click to expand...

Thanks, so... sorry to sound an idiot..

I would use it to measure the PH of my solution after mixed water and nuts? Right? How should it be?

I've always just checked the soil one!

In case is not right is there any PH up/down product that you suggest specifically?