Excessive lighting?

[pinky2213]

needing a little advice, Is it possible to dry out a plant (make the leaves dry up) by using too much lighting (flouro) if the root system is too small? I recently transplanted to from 1 gal pots to 5 gal pots (in soil) and went up from around 10,000 lumens of 5,000k to 30,000 lumens of 6,500k. When I did this some of my leaves started drying up. And now I am getting white/opaque leaf tips. My girls looked really good before I did this healthy happy no issues at all. they just started slowing in growth rate so I gave the roots more room. Now they have me worried! Any help would be much appreciated...

 

[go4snypr]

temperatures,waterings, feeding shedules, veg, flower?? how long have they been growing,how far are your lights from your plants, the more info you can give the better chance someone can help you pictures also go a long way. It could be any number of things....

 

[pinky2213]

thanks snypr your right I should have posted more info. the plants are in veg (5 weeks old +or-). I really haven't got them on a feeding schedule yet since I switched bucket size. when I transplanted last Friday the MG Garden soil I used was pretty wet (almost dripping wet in fact) I added about 10% ewc and about 15% pearlite to my soil. I have only actually watered them once using general hydro flourgro and floramicro @ 1/2 strength 1/2 tsp per gal. the light I am using is a virtual sun 4"x6 tube 6,500k light. I have it about 3' from the plants. I am running co2 (not sure how many ppms) I just made my generator like the ones you see on utube the sugar/yeast method. I keep my temp @ between 74 and 80(f). they range between 12" and 10" in height. Overall they actually look pretty good but before the transplant they were beautiful and any malfunction worries me. I am going to try to post a couple of pix shortly.

 

[pinky2213]

this is my problem and it is not all over the plant but I would like to stop it before it spreads.

 

[pinky2213]

and on a side note. should I resize my pix in the future or are they ok?

 

[c526]

I don't think its you're lights, ive had this type of necrosis,so I am interested in your solutions
ive treated mine as a phosphorus deficiency/lockout

what is the ph of your water/food solution??
did you also use MG perlite??
how many and how big are the drain holes in the buckets??

 

[pinky2213]

I did use MG perlite I put 5 3/4" drain holes in the buckets and I run a 7.0 ph. I don't really know a lot about lockout. I am new to the indoor grow environment. I was thinking about adding some h2o2 and molasses to my next feeding and see if that helps. But I really don't want to go just shooting in the dark and adding a bunch of this and that. the new growth looks pretty good except for the very tiny white tips of the leaves. Barely enough to even see it but it is still a concern for me

 

[pinky2213]

let me ask you , do you ever cut your fan leaves? I was thinking about removing some of mine, they are so big they are shading the limbs completely in some places.

 

[Hosebomber]

That is not light burn, it appears to be cal def, but I'm no expert on plant problem identification. Trimming the leaves so the limbs get light is not a good idea. The leaves are what provide the plant with all of the energy to perform the growth functions. The limbs or stems are like the veins in your body. You wouldn't cut off you leg to get more protein in your diet. If you are saying that they are blocking some of the newer young growth below them, you can trim them but plants are amazing creatures, the limb will twist turn and grow it's way to the light it needs without help.

 

[pinky2213]

thanks for the input I didn't really want or think I should because in my opinion they are a big part of what makes the plant perform. Should I leave the leaves that have the issue in your opinion? The new growth looks good but I just think they look like crap with those damaged leaves on there. And I am going to check my GH nutes to see how much cal it has. Up until now I have only been feeding 1/4 the recommended amount per gallon ( I didn't want to burn them) it actually calls for 1 tsp per gal.

 

[c526]

to trim? or not to trim? that's a loaded question, everyone has an opinion on defoliation, me personally? i'm a chopper, I have no problems removing nasty looking leaves(once new growth is cleared)

nature has a way to move the plants---in doors, we are nature, we control everything
there are growers who harvest, then reveg whole plants, then harvest again

water at 7,is a little high

very good info--pictures from kjc

Cannabis Plant and Pest Problem Solver - Pictorial

 

[pinky2213]

thanks brother. The graphic is VERY helpful. Looks like I will be adjusting my ph down a little . I have never heard of harvesting and then "re-veging" I actually had no idea that was even possible. Do you mean that after you switch the light cycle to 12/12 and harvest, you can then switch back to 24/0 and they will actually go back to veg?

 

[c526]

As ive beenreading,yes-that' what they are doing, taking everything except main branch, last journal I read the grower was doing it in dwc , I cant afford to wait/wastes space so ive never done it with mj, but I am currently doing this on indoor potted pepper plants,3rd harvest from 1 plant

ive personally taken clones/cutting from plants as late as 4 weeks into flower, they are stunted for a couple of weeks then they take right off

look at the mg soil and perlite do they both say"added time release nutrients"?

check the ph of water going in AND runoff coming out. do you have a ppm/ec meter??

5x3/4 is ok, I prefer more, smaller holes maybe as much as 25-30 x1/4

 

[pinky2213]

I will check the MG bags. thanks. I am new to indoor farming so I have a lot to learn but I love knowledge so hopefully I will be ok . I have been thinking about doing a few clones do you use rooting hormone and Rockwool? I have heard so many diff ways people clone idk if I want to try it or not. lol And I need to get me a test meter I have just been boiling and filtering my h2o and using test solution. (im on a budget)

 

[c526]

everyone is on a budget of some sorts. ph meter,ppm/ec meter and a 30x jeweler's loupe all can be had for under a hundred-if I had to put in order---1-ph meter(and solutions) have to know whats going in
2-the loupe(have to see whats going on,also end of harvest)
3-ppm/ec meter

I have a mess when it comes to cloning myself,over half of mine don't make it,but im learning and getting better,,funny thing is
I cut 6 clones last week and only put them in a glass of water(like flowers) they maybe my best ones in 3 years
and that's all I did-cut on angle-put in glass of tap water-into humidity dome-nothing else

other wise I use rapid rooters or Rockwool cubes and powder. I also have a 6 site mini cloner bucket(diy under 20 bucks)

don't be afraid to experiment, most times its the only way we learn

 

[pinky2213]

I do have the eye loupe but I do need to get a meter (soon). And as for the MG yep they both have nutes in them grrrrr . The Garden siol says feeds up to (3) mo. and perlite says enriched with....... . As for my ph in/out I did some str8 water today and gave them a good dose. My (in) was 6.5 and my (out) was like 5. Can you tell me why the diff and do I need to correct that (and how) ? And BTW. I really do appreciate your help !

 

[c526]

that one of the problems with the mg products---control-- plus you added ewc(nitrogen}

sounds like a flush is in order-3x the container size of ph water

I hope one of the more advanced people show up here,my advice is only my opinion

if it was me/- I would find a way to get some smaller holes in the bottom of that bucket,-increasing the runoff
I had my son hold my buckets while I carefully drilled more holes in the bottom
for me this did 2 things--allowed faster runoff(that led to less salt buildup) and it also allowed air to dry the soil faster= more feeding
make sure your run off collector (bucket,saucer} are clean I check runoff a few times-beginning -middle-end-never with same collection plate

the 420 is going nowhere pinky-these growers will get you to harvest

 

[pinky2213]

yea I actually thought about the added air benny after I thought about what you said about how many holes you put in yours. And it has only been 10 days since I transplanted them to the 5 gals, I don't think the roots would really have had enough time to make it down. I will most likely do 20 more 1/4 inch in each one. As far as flushing I really don't have a problem with doing that. But I am not sure if there are any risks. I will probably do some reading on it.

 

[David Bowman]

...I don't think the roots would really have had enough time to make it down.

You'd be surprised how fast a tap root can move through soil. While I agree 10 days since transplant is nowhere near enough time for the roots to fill out your 5 gallon pots, I wouldn't be surprised if your tap root is, or is very close to, hitting bottom.

 

[pinky2213]

yea I totally agree they do move faster than one might think. The Flushing thing worries me though I have an old grow bible by "Greg Green" (I think) and in it I read that one could reverse the acidic situation if one carefully added (lime) in small amounts. does this sound right to either of you?