polar lights #2 problem

[thc farmer]

Hi, as an inexperienced grower I am having a bit of troble with this plant, its a polarlight #2 planted in 20 may, it has the old fan leaves whitened and some tips burned, the smaller ones around the top cola are discolored. I also have other PL#2 planted in the same day and its green and almost twice in size.
The soil is 2/5 all purpose soil and 3/5 worm castings from weeds and several hervivores manures on a +/- 10 litres pot and I sometimes wather with worm castings tea but with this plan I did it only once fearing nurtrient burned. I flushed and it was past 2 weeks with no improvement, the growt is several stunned.
I am portuguese and I am not very gifted on writing in english so I beg yours pardons if I didn't get understud.

Thanks

 

[A4]

Hey farmer, no problem with your English. It is better than my Portuguese! It looks like a severe copper defeciency from the way the leaves are curling and the older ones are turning white. Very possibly due to improper ph of the soil. You said you flushed the container, what ph did you flush with and what was the ph of your runoff from the container? I assume since you didn't mention this in your initial post that you probably don't know? It is very important, especially from the looks of this plant to get the ph in check as quickly as possible.

 

[thc farmer]

Hi mate, yes I don't check the ph of the soil or water, I do have some ph strips from an aquarium that i'll try tomorrow but I gess it isn't very precise. Do you know some good and durable ph checker that is affordable?
also if you can answer it how can the same soil/water/fert work fine for one plant and bad for another.

Thanks

 

[A4]

Hey farmer,
I can't personally recommend this meter as I haven't used it but I do use the more expensive Hannah and it works flawless for me for quite some time. With that being said, http://www.amazon.com/Hanna-Instrum...id=1372086153&sr=8-1&keywords=hannah+ph+meter

As for the ph being out on one and not on the other. I can't answer that. If it were another seed, I would say different phenotype but from what I have seen Polar Lights are extremely homogeneous. I will say, I grew them a few months ago and they were extremely ph sensitive. I had almost the exact same problem early on and fought it throughout the entire grow with one plant. You can see the complete grow here. https://www.autoflower.org/f44/dutch-passion-polarlight-2-grow-17738.html

Keep us informed on what you find with your ph, I would be very surprised if that is not the problem.

 

[thc farmer]

Hi a4, damm men your buds looked great congrats on that. I wished mine would become that big, but there's no way that's going to happen. I messed up by planting them first on a stuff for germinating trees -_- and also the weather was shit for almost the first month. Anyway I have 8 DP autoflowers plus a unknown photo strain that initiated me on cultivating this beautiful plant last year, maybe I will even grow another DP auto or two this summer so I will be able to smoke all year for sure.
So I tested the water from my well and it was between 6,5 and 7 then I did the same with the runoff and it was between 6 and 6,5. I know the strips aren't precise so I will definitely buy a digital ph checker from hanna.

Thanks

 

[A4]

Yeah bro, if your runoff is showing 6-6.5 and you are watering at 6.5-7 then your ph is probably at or below 6. You are probably correct, the strips aren't going to be accurate but they are definitely showing that your ph in your soil is lower than your water. The problem here is not knowing exactly how much it is off then I don't know exactly how much to bring it up. I don't know how quick you can get your hands on a decent ph meter? If it is going to be a while I would suggest trying to add a little sodium bicarbonate to your water for that plant. Try to shoot for 7-7.5 going in to the plant, that would boost the ph of your soil a little. The main thing is, your growing in organics so you want your ph ~ 6.8 or so. Your water seems pretty spot on but probably when you are adding your nutrients it is dropping your ph some. This is normal. My water starts at exactly 7.0, after I add my nutrients and retest my ph is normally around 6.0 - 6.3. This is probably where your ph drop is coming from and if I were betting, it isn't going to be long before your other plant begins to show the same signs of deficiency! You gotta get on it quick bro!

BTW, thanks for the compliments! It was my first auto, that Polar Lights, taught me quite a bit about autos very quickly. They are quite finicky plants compared to photos, lol. But they are quick producers of bud when grown properly. The only problem is, you have to react quick with them because every day that is deficient you are loosing precious time in bud development.

Best of luck farmer, keep us updated on your progress. I will try and check this post every day until you are back on track but if you have some questions and I don't see it shoot me a message and I will get back with you.

 

[thc farmer]

The only problem is, you have to react quick with them because every day that is deficient you are loosing precious time in bud development

I'm learning that the hard way xD but I don't mind at least I'm learning, and I have to say that I already learned a lot since I've started reading online. Until like a week I didn't research on cultivating weed but now I see how important it's to achive quality bud.

I didn't had sodium bicarbonate so I managed to get the ph near 7,5 by adding wood ash tho the water. The runoff was still on the 6-6,5 range. I will try to buy the ph checker this week but probably I will get it only next week. I should have checked the ph of the worm castings tea used for veg and the banana peels used for flowering but I dunno the problem is from that because I only used the worm's tea once for this plant. The others took it 3 times and the first banana feed was yesterday, they are all green and growing since I put them on decent sized pots, that was my major screw up in this grow.

Thanks for all the help mate I'll be burning one for you right now :smoke:

 

[A4]

No problem bro, the only thing I ask is that you hang around and help someone along the way. Pay it forward, that is how it should work. That way everyone has a helping hand.

 

[thc farmer]

I will definitely stay in this forum, I've been reading a few posts and it's very clear that there are some pros were :thumbs: . I still have a lot to learn but I'll try to help whenever possible.
Cheers from a friend across the Atlantic (I guess):smokebuds: