Corinto, ka5h and haze cross

[aliceklar]

Dude... you have my sympathy. Hope you can rest up and heal quickly.

 

[blondie]

Ughghghghg! My back is FUBAR. It’s beyond pain. I’ve been ingesting copious amounts of cooked dry flower. A chaser of over the counters rounds out tonight’s cocktail. I can walk a bit after this. So.. i shuffled down to the tent and took a few images. My grow is doing well. I think I’ve got LEDs figured finally, for my grow style at least.

I am a bit worried about light colored yellowing leaves and it’s either low N or maybe low magnesium. (Or??) I’ve been adding cal mag so much I’m concerned about the amount. I’m thinking can’t be low magnesium based on this.

Last night watered with espoma bloom. Thanks @Dr. Mantis Toboggan . Didn’t know espoma made this til I saw you post about it. I think this should be a perfect bloom for LEDs since it has the cal. So far I don’t see a difference but watered half strength.

Leaf images..

 

[StickyBandit]

Sorry your back is giving you grief mate. You don't realize how important it is till there's something wrong with it.
I get similar yellowing at this stage, let me know if you figure it out I ended up supplementing with calcium nitrate 1gm per L and that worked for a while but then the tips burned, maybe 0.5gm/Liter from earlier on would be better. Seems like a fine balancing act. That's one reason I'm trying coco hempys
Good luck

 

[blondie]

Greetings everyone. Corinto update. Leaves are definitely yellowing and I’m going to be adding the bloom liquid to the one led corinto and my crosses. The cross also started showing leaf yellowing all the sudden. My hps corinto is doing great though. A long branch has spilled over into the led side and can be seen below. That plant is just a monster. I added bloom to it a few days ago now as a few leaves are yellowing. Does not seem to have done anything. I’ll add full strength to all plants but the ka5h and the one curled leaf corinto. Overall corintos are doing well, though I’m concerned the amount of leaves I’m losing. Hopefully this bloom will turn it around.

 

[Timj]

Nice plants @blondie. I hope your back is better today.

 

[StickyBandit]

As long as the moisture levels are good I wouldn't worry too much about the yellowing leaves. Mine always do that but if you over fert you can cause damage to the bud structures and start the crispy leaf thing going on which seems to ruin them in my experience, but I'm not very good with soil anyway

 

[nick11]

Nice grow blonde, love the strain selections. You got a freaking rainforest in there! Going from hps to led was a big learning curve for me. The biggest was light distance...hand trick doesn't work for led. Plant tops will fry fast under led if too close. That and cal mag consumption tripled with led lights I swear. I use epsom every other watering..kinda strange.

Your plants look fine to me, its hard to keep a sativa completely green all the way due to their picky nature. Hows air flow? Canopy being too hot will cause crispy leaves too. Good luck to you

 

[blondie]

Welcome All. Thanks for stopping by. @nick11 ... that mirrors my experience. Mind I ask what cal mag you are using? I bought off the shelf cal mag from bonide I think it was. I’m going to keep adding but go with a double dose now. I’m wondering also mine is taking even more cal mag. I’ve got the 6500 in the 4x4 and it’s so bright. Seems light level has to be part of overall cal mag needs. Stronger the light and likely closer the more cal mag...? Seems reasonable.

Sticky.. that is good to know. Seems a balancing act I’ve yet to master. More cal mag doesn’t seem it can hurt. Maybe hold off on the bloom for now..

Meanwhile... my ka5hs under hps are very healthy. One is flowering like crazy, other is still healthy plant, just not fast with monster buds. (Yet..) I did singe the top of the better plant a little. Lifted the hps with some difficulty. My back is improving at least. Woo hoo.

Edit: forgot air flow. I’ve got a large fan from ac infinity that sucks air into the tent and discharges at the ground level. Model escapes me at the moment. But it moves quite a bit. I’ve also got a fan on my hps hood that sucks air out of the top. I think airflow should be adequate.

 

[X15]

Nice looking plants @blondie !
Glad your back is feeling better!

 

[blondie]

@X15 Thanks for well wishes! Back is improving. Nice grow BTW. Just saw your diary.

I actually looked at my cal mag and saw it’s 2-0-0 . I doubled the usual cal mag dose tonight and gave a good watering. Also did a bit of foliar on the leaves. Now is the time to resolve before a seed run of Corintos. Hopefully this is going to stop the yellowing.

@StickyBandit I looked for cal and see most is 15-0-0... lots of N. What was the cal you used? I might pick Some up after my cal mag is gone.

 

[StickyBandit]

@X15 Thanks for well wishes! Back is improving. Nice grow BTW. Just saw your diary.

I actually looked at my cal mag and saw it’s 2-0-0 . I doubled the usual cal mag dose tonight and gave a good watering. Also did a bit of foliar on the leaves. Now is the time to resolve before a seed run of Corintos. Hopefully this is going to stop the yellowing.

@StickyBandit I looked for cal and see most is 15-0-0... lots of N. What was the cal you used? I might pick Some up after my cal mag is gone.

I was adding calcium nitrate which might be what you're looking at if it's high N? I thought about mixing garden lime with the water (not dolomite) but gave up and just found a good quality nutrient mix. I have heard of others using different types of calcium minerals. Sorry I can't help
You seem to have pretty good instincts

 

[nick11]

Sounds like you got everything on point! Some strains just yellow out more for whatever reason. I have a shiatsu kush doing it now. 4 other plants are perfect while it's got yellow leaves. The plants healthy as can be just yellowing. See what i mean? Crap soil will do it too. I went cheap and didnt use fox farm soil. My mango haze on the right is doing it too with the cheapo soil. All other plants are green, so maybe I should've added dolomite for ph.? I'm having same issues haha

 

[X15]

Thank you @blondie !

 

[Maria Sanchez]

Looking beautiful in the tent there @blondie
Hope your back issue is healed as soon as possible.
Shanti shanti shanti.

 

[Timj]

@X15 Thanks for well wishes! Back is improving. Nice grow BTW. Just saw your diary.

I actually looked at my cal mag and saw it’s 2-0-0 . I doubled the usual cal mag dose tonight and gave a good watering. Also did a bit of foliar on the leaves. Now is the time to resolve before a seed run of Corintos. Hopefully this is going to stop the yellowing.

@StickyBandit I looked for cal and see most is 15-0-0... lots of N. What was the cal you used? I might pick Some up after my cal mag is gone.

My well water is high in alkalinity. I struggle with the opposite of your experience. My growing medium slowly increases in pH and after three cycles it's so high I experience iron lockout.

 

[blondie]

Thanks everyone. @nick11 . Your plants look great! My corinto is bad bad bad. I need to turn it around quickly. I’m thinking add EWC soon. Maybe this strain just drinks N under LEDs. Not sure yet.

I stopped using lime for a bit and now am adding again. Dolomite from espoma. I’ve also started trying to amend for a month at least before using soil so that and other items break down and become available. I should have a healthy amount of available lime now from previous grow.

 

[Timj]

I'm curious if you ever check your growing medium pH. Whenever I recycle my medium I always check it's pH by performing a soil slurry test. And make adjustments when necessary.

 

[blondie]

@Timj .. I’ve just started recycling soil and am trying to dial in what exactly soil needs for a second grow. I would love to get to the point of adding nothing and unjust letting grow. So far, No slurry test, but I did check run off ph. Not a bad idea though. I think just add neutral water to soil, shake ,let settle, test ph? Keeping organic, liming and using only rainwater seems my ph should not fluctuate. That is my thinking at least. But... I bought the ph meter so may as well use it.

 

[Timj]

I'd like to share a post I made on the other site I belong to just to clarify organic soil pH.

It's a bit misleading that our microbiology will adjust our soil pH or even adding copious amounts of organic matter will adjust our pH. Soil microbes have the ability to make slight changes near the root tip. Organic matter will buffer our pH some. Both have an impact on our pH. But, neither will bring a highly acidic or alkaline soil back into a neutral pH range.

I'll also add a link I shared if you're interested in browsing over it.

This article explains things a bit better and adds some more insight on how pH affects soil microbiology and fungal communities.

https://www.nature.com/articles/ismej201058#:~:text=Soil pH has a strong,for example, Lauber et al.

 

[blondie]

This corinto is the yellowing one. I’m concerned as I subscribe to the idea good green leaves produce best bud. I’m starting to think this is just low nitrogen. Maybe the corintos really need that N especially under LEDs. Put a few dollops of EWC on the top and gave a little water.

Measured ph runoff at about 6.7 . It started at 8.4 and dropped. It slowed about 7 and didn’t move much after 6.8 . I got sick of holding it and am calling it within good range. Does anyone else’s ph meter just keep dropping slowly?

Slurry test was 7.07 . As long as my testing is not that far off my PH should be good I think.

Here is the yellowing corinto in all its glory.