Light stress or normal

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Holdmyhammer

Member
Light stress or normal for week 3 flower? All went well until I flipped. Now it’s got a little burnt on the tips. I don’t think it’s light stress bc none of the leaves are canooed or tips curling up. I use fox farm soil. Ph to 6.5. Last feeding I used tree trunk silica from Humboldts secret. Lights about 20 inches away from top of canopy. The discoloration is on 2 different plants of different strains. I appreciate the help. It’s probably just normal fade but it’s a little early i would think only being week 3. Added a picture from top
 

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Delps8

Well-Known Member
I don't see anything that indicates that those plants are getting too much light. As you say, no canoeing/tacoing. The light green color could indicates that they need more nutrients and the morphology of the plants indictates that they could benefit from more light.

Looking at the plants, I see characteristics of plants that have not received much light — there are a small number of large leaves, the plants have long and slender stems, and, in all photos, the internodal space is significant.

At this stage, early flower, cannabis will thrive in 1kµmol±.

Why are to keeping your light at 20"?
 
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Holdmyhammer

Member

  2. Delps8 said:
    I don't see anything that indicates that those plants are getting too much light. As you say, no canoeing/tacoing. The light green color could indicates that they need more nutrients and the morphology of the plants indictates that they could benefit from more light.

    Looking at the plants, I see characteristics of plants that have not received much light — there are a small number of large leaves, the plants have long and slender stems, and, in all photos, the internodal space is significant.

    At this stage, early flower, cannabis will thrive in 1kµmol±.

    Why are to keeping your light at 20"?
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    Had significant light stress all through my last run. This light is powerful. I’ve went easy on all nutrients. I’m using Gaia green all organic beside the bud booster. I seen some burnt tips so I’ve laid off feeding them the past 2 feedings. I’ll turn the light up and feed next watering.
 
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Holdmyhammer

Member
Delps8 said:
I don't see anything that indicates that those plants are getting too much light. As you say, no canoeing/tacoing. The light green color could indicates that they need more nutrients and the morphology of the plants indictates that they could benefit from more light.

Looking at the plants, I see characteristics of plants that have not received much light — there are a small number of large leaves, the plants have long and slender stems, and, in all photos, the internodal space is significant.

At this stage, early flower, cannabis will thrive in 1kµmol±.

Why are to keeping your light at 20"?
Click to expand...
Ty for the reply. Was starting to think nobody was here lol
 
420 Garden

420 Garden

Well-Known Member
Your plants look good. It is normal to see a little change in color durring pre flower. Just remember to continue to include Nitrogen in feeds, even if you dial it back a little when you introduce bloom feeds.
 
FmSwayze

FmSwayze

Well-Known Member
Do you have a light meter?

I'm using dry amendments as well and like @420 Garden said you will see change in color. I've actually experienced it at different growth stages throughout. I use a lux meter, best investment I've ever made. They look great, if you run em hard make sure everything else is in order water, temp humidity airflow etc. Great looking plants btw! Keep grinding
 
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Holdmyhammer

Member
FmSwayze said:
Do you have a light meter?

I'm using dry amendments as well and like @420 Garden said you will see change in color. I've actually experienced it at different growth stages throughout. I use a lux meter, best investment I've ever made. They look great, if you run em hard make sure everything else is in order water, temp humidity airflow etc. Great looking plants btw! Keep grinding
Click to expand...

I got the Photone app. I’ve really been just judging by the leaves. I’m gonna buy a lux meter so I can be more on top of it. I could have done better for sure but they are still standing tall at least haha
 
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Delps8

Well-Known Member
ec121 said:
The first signs of light stress when using LED lights is interveinal chlorosis on the top of the plant. That will happen before any canoeing occurs. Basically looks similar to a magnesium deficiency but affecting the top part of the plant instead of the bottom.
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Interesting - I've given my plants too much light a fair number of times because I give my plants "lotsa light" and I've only seen interveinal chlorisis once and that was not associated with excess light.
 
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Bullmark

Well-Known Member
Your light should have a chart somewhere (owner’s manual, website) that shows its coverage readings at various distances from the canopy. This info can tell u how much intensity your plants are receiving, which is measured in PPFD. Based on the lights I’ve seen, I doubt your plants are getting too much, but u never know. Most strains can handle around 800ppfd in flower without issue.
I’ve used the chart from my light to kinda calibrate the Photone app for my phone.
 
420 Garden

420 Garden

Well-Known Member
Do not let that discourage you. It is part of the learning curve. Shit I've grown the Charlie Brown weed plants before. No shame in that. But you have to ask questions, read, watch videos. Any way to gain the skills. Talk to people, that is one of your greatest resources to get knowledge. If anyone on this RIU page tells you "your asking stupid questions." You don't want their knowledge anyways. Your not bothering anyone, that's how we all learn. I have felt your pain and frustration. But,
by not giving up is how you get good. Another thing, look at growing as a hobby. Something that gives you Peace, joy and happiness. Do you think there is a better feeling in the world than a friend comes by, you fire one up and they say " damn that is good. Where did you get that at? Choice is totally yours, but I have to be honest with you. If your just starting out and give up that easy. You really didn't want to grow weed anyway. Good luck my friend, Hope you do what makes you happy.
 
FmSwayze

FmSwayze

Well-Known Member
I wonder if that is why the science says get them highly saturated as soo
420 Garden said:
Do not let that discourage you. It is part of the learning curve. Shit I've grown the Charlie Brown weed plants before. No shame in that. But you have to ask questions, read, watch videos. Any way to gain the skills. Talk to people, that is one of your greatest resources to get knowledge. If anyone on this RIU page tells you "your asking stupid questions." You don't want their knowledge anyways. Your not bothering anyone, that's how we all learn. I have felt your pain and frustration. But,
by not giving up is how you get good. Another thing, look at growing as a hobby. Something that gives you Peace, joy and happiness. Do you think there is a better feeling in the world than a friend comes by, you fire one up and they say " damn that is good. Where did you get that at? Choice is totally yours, but I have to be honest with you. If your just starting out and give up that easy. You really didn't want to grow weed anyway. Good luck my friend, Hope you do what makes you happy.
Click to expand...
This nails it! Well said. Bravo!
 
J

joesoap2013

Well-Known Member
You can stupid stuff for loads of grows like
I used to have an oscillating fan at canopy level took a load of squares up on my net
Thst reduced my yield
And I use to use smaller reflector in the hps
Got a bigger 1 and went I should have done this ages ago
 
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