Nitrogen deficiency?

harrychilds

harrychilds

Well-Known Member
Hi guys, I have a few plants and some of them seem like they are turning light green/yellow. My E.C is 1.2, temps 28c, humidity 55%. They are 4 weeks old. in coco. I am suspecting it is a nitrogen deficiency and they need more feed? One of them looks a nice green colour and the rest look a bit pale. . I am feeding them until run off. They were growing really fast and now they seem to have turned a yellowish color so I am guessing they need more feed? I switched from LED to HPS because I was having problems and now the problems have came back again. Any help is appreciated
 
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harrychilds

harrychilds

Well-Known Member
It's fine guys, I've figured it out. They need more feed to carry on growing. That's why they are getting a deficiency
 
harrychilds

harrychilds

Well-Known Member
Rurumo said:
Two questions, are you feeding them daily? Also, are you using the Canna A/B? 1.2 should be fine if you are feeding to runoff daily.
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Not at the moment, I feed until run off and let them dry out slightly. once the roots get bigger and properly fill out the 1 liter plant pot I will feed them daily. And yeah I am using Canna A and B. I thought 1.2 would be fine myself but they seem to be developing a nutrient deficiency now from lack of feed, so I guess I should up it from 15ml of canna A and 15ml of canna B to 20ml of each per 10 liters of water? They seem like heavy feeders
 
harrychilds

harrychilds

Well-Known Member
They are 20 inches away from 400 watts of HPS light and they were growing fine until recently, nothing has changed. I view it as an Engine and the engine needs more fuel to carry on?
 
harrychilds

harrychilds

Well-Known Member
I think it has depleted the nutrients and 15ml of each per 10 liters of water isn't enough anymore? They need more feed or the nutrient deficiency will get worse?
 
harrychilds

harrychilds

Well-Known Member
When you think about it, they need more food over time and I think that's why they are starting to yellow now? They need more food to carry on? I'm not 100% sure but that's what I guess? I can get photos if that makes it easier :)
 
harrychilds

harrychilds

Well-Known Member
Let me just make this clear, sMACkin by in-house genetics are a very heavy feeder and I have been struggling with it all along, I keep upping the feed and they love it and grow nice and green. And after a week they start dying again and I have to keep upping the feed to save them. It's a constantly battle with them. I guess I am going to have to up the feed again to get that nice green growth? Most strains I have done have never been this heavy on the feed. They seem to keep needing more. But I guess high potency strains need more feed to grow more thc?
 
harrychilds

harrychilds

Well-Known Member
It's all a test for me, I have never grown this strain before. And the LED failed for me, they weren't growing fast enough, the HPS light really changed that for me and the growth was booming but over the last few days it has slowed down! But yeah, a few weeks into Flower, I might switch back to the LED light at 100% intensity and see how I get on. I guess with so much growth I just need to up the feed a good amount to stop the yellowing?
 
1

1212ham

Well-Known Member
harrychilds said:
Not at the moment, I feed until run off and let them dry out slightly. once the roots get bigger and properly fill out the 1 liter plant pot I will feed them daily. And yeah I am using Canna A and B. I thought 1.2 would be fine myself but they seem to be developing a nutrient deficiency now from lack of feed, so I guess I should up it from 15ml of canna A and 15ml of canna B to 20ml of each per 10 liters of water? They seem like heavy feeders
Click to expand...
Feed every day in coco, never let it dry.
 
1

1212ham

Well-Known Member
harrychilds said:
It's all a test for me, I have never grown this strain before. And the LED failed for me, they weren't growing fast enough, the HPS light really changed that for me and the growth was booming but over the last few days it has slowed down! But yeah, a few weeks into Flower, I might switch back to the LED light at 100% intensity and see how I get on. I guess with so much growth I just need to up the feed a good amount to stop the yellowing?
Click to expand...
4 week old plants a few weeks into flower?
 
Rurumo

Rurumo

Well-Known Member
With 1 liter pots, you can definitely feed daily. With coco, instead of raising the EC when the plant needs more nutrients, you increase the # of feeds instead. Give it a try Harry, coco takes a little time to "click" but once it does, you'll start getting great repeatable results. I only give the plants a slight wet/dry cycle for a few days after transplant (roots fill out fast!), and during the first 10 days from sprout, the rest of the time I feed at least daily, and then twice daily towards end of veg. Good luck, you'll get results soon if you keep trying.
 
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