Help Please Problem with plants

help please if you can 3 days ago I noticed some problems with the lower part of one plant a few leafs and stems where bending down.Now as of today I have some light green and yellowing going on on both plants ,its seems to be only in the lower part of the plant, I was planing on going to flowering on friday.... 7 weeks from seed , 400w MH ,temps 67 lites off 78 lited on . im in hydro.

Do you measure PH and what nutes do you feed her?

PH 5.7 solid / nuts are dyna-grow grow/ protekt / mag pro. water 15ppm on .5 scale . just did a res change 2 days ago after seeing I had issues arise, 400 ppm start- today at 371 ppm , did a flush for a hr with water and to check roots when I did res change root system looked excellent white, hairy no sign of any problems.

I'm not familiar with DG, I hope someone who does can help you out. Besides that the PPM seems low to me (I'm at 750 with similar and smaller sized plants, of which 150 is from the tap water already) you seem to got your basis covered. Have you tried increasing the PPM to a level where it stays the same or even increases slightly? Another thing you could try is letting that PH value climb a bit for a day or two (to 6.0-6.3) so it can feed on Mg easier.

jrainman said:

help please if you can 3 days ago I noticed some problems with the lower part of one plant a few leafs and stems where bending down.Now as of today I have some light green and yellowing going on on both plants ,its seems to be only in the lower part of the plant, I was planing on going to flowering on friday.... 7 weeks from seed , 400w MH ,temps 67 lites off 78 lited on . im in hydro.

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This looks normal to me. I usually trim off the lower skirting and don't allow to much density inside the plant. Usually the growth is small and/or poorly formed from lack of adequate light. So more light or trim some of the light deprived areas. This is also why I went up from 250 MH to 600 HPS and finally 1000 HPS on mine. I get more deeply into the canopy. I'd also get ready to add in Ca/Mg as Cannabis often likes a little more. But your plant looks very nice, good job.

My last res change I tryed to up the nutes to 400 and 12 hrs later the fan leafs starting almost turning black so figured toxing was occuring and added 2 gal ph water down to 350 and then all was good, up untill 2 wk of veg I was keeping 5.9 ph steady and found slow growth , looked at ph avalibilty chart and felt my micros were not getting fed ,and took it down to 5.7 and then a couple day later good growth started to occur. I dont know why I can not get my plant able to handle higher EC ,the strain journels Ive read say they can handle high nute intake ,but Im finding that not to be. thanks for helping

curious2garden said:

Usually the growth is small and/or poorly formed from lack of adequate light.

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Yeah, 4th picture is a good example of that. Looks like the stuff I remove below scrog net.

First off thanks for the compliment, I was thinking I had penatration issues also so when I did first see somthing is going on I did some LST if you can see in the pictures, yes density is ther ,alot now on the top half, and when I did the seedling transer I def put the seedling to low in the net cup so I do have a lot of low skirting going on,So its ok to trim some of the fan leaf? ? also I have some 23w 3500k 1600L CFL bulbs would these be ok to use as additional side lighting .? thanks for your helping this newbie out

Yup side lighting helps but frankly get rid of a lot of useless skirting. I know my thought was I was losing bud but I was wrong I was losing bud by leaving those because they competed for nutrient from the other buds.. Like Sativied said about removing below his scrog line. I try to get my plants to concentrate on their main colas or when I'm flowering mothers their 4 to 6 main bud sites. Good looking plant you have there.

jrainman said:

My last res change I tryed to up the nutes to 400 and 12 hrs later the fan leafs starting almost turning black so figured toxing was occuring and added 2 gal ph water down to 350 and then all was good, up untill 2 wk of veg I was keeping 5.9 ph steady and found slow growth , looked at ph avalibilty chart and felt my micros were not getting fed ,and took it down to 5.7 and then a couple day later good growth started to occur. I dont know why I can not get my plant able to handle higher EC ,the strain journels Ive read say they can handle high nute intake ,but Im finding that not to be. thanks for helping

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That is why I love hydro so. It is so quick and easy to turn around. So far the Cannabis I've grown seems to like vegging in the 400 to 600 PPM range. Depending on the strain I usually top out around 800-900 and I don't think I've ever gone above 1200
ymmv,

I rarely remove fan leaves near the top, unless plants overlap each other heavily in a scrog or to increase air flow for example. Instead, I push them down (behind/below a branch so they stay down at least for a day), especially during vegging. Doesn't make the plant look any prettier but keeps it leveled and wide. Side branches that don't make it to the top, just don't make it.

I'm not sure what the English term is, still working on my English growers vocab , but we call it thieving (stealing lower branches that would turn out to be popcorn and redirect the energy to denser and bigger buds at the top). I do it 1-2 weeks after switching to 12/12, so they can stretch like they (especially Sativas) do the first weeks of 12/12 and I can see easier what would become popcorn.

Ok so I understand fully and want to thank both of you for your time answering me, Now I just want to get this right before I do , I plan on switching over to 12/12 in 2-3 days , Satived you wait till first or second week ,Why ? what is the reason you dont due in Veg state, and also I am taking (cutting) everything off the lower section, where do I draw the line on how high up I cut is it just the first let say 2 inches of all growth?

jrainman said:

Ok so I understand fully and want to thank both of you for your time answering me, Now I just want to get this right before I do , I plan on switching over to 12/12 in 2-3 days , Satived you wait till first or second week ,Why ? what is the reason you dont due in Veg state, and also I am taking (cutting) everything off the lower section, where do I draw the line on how high up I cut is it just the first let say 2 inches of all growth?

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It depends on your light and your strain you are growing. I usually take everything from a foot down and remove anything deep internal that isn't getting light. So I trim them once after stretch. I wait until after stretch so that I know where to trim. Oh and during the first 2 weeks I also feed veg nutrients. I don't swap to bloom nutrients until after the stretch either.

I'd say inadequate lighting to the center of the plant. try topping the first two nodes and open up the center of the plant or try tying back the main stem to allow more light to the center of the plant while rotating on a daily basis of 90 degrees. also, staking might be a viable option. another option yet would be to add some 45w CFL bulbs under the canopy to add side lighting

jrainman said:

Satived you wait till first or second week ,Why ? what is the reason you dont due in Veg state,

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I mentioned that in my last sentence:

"so they can stretch like they (especially Sativas) do the first weeks of 12/12 and I can see easier what would become popcorn." but to clarify: plants don't switch from vegging to flowering when you switch to 12/12, they will continue to veg and grow and stretch for weeks (Sativas typically longer than Indicas). So basically it's just to get a better picture of which branches will make it to the canopy and which don't. Branches that are clearly not going to make it I do remove earlier. I do prefer to do as much as possible at once, rather than spreading it out over multiple times and stressing the plant too much.

How far you want to go depends on several factors, such as the length of your plants and (the range and angles of) your light and the density of your canopy, etc. It's obviously easier to draw the line in a scrog or SoG.

Although it's a simple technique, here's a video of a smaller local breeder doing it early on (and imho a bit too much too soon) :
https://www.youtube.com/watch?v=EJY59d-ml_A

Ok so I wait untill 12/12 stretch is done ,understand now, I was researching this topic yeasterday about trasition to 12/12 on nutes for the first 2 weeks , I was planning on 50/50 veg n bloom for the first week then cutting back to 25 veg 75 bloom. but you have better results keeping 100% veg nutes during the stretch period of first 2 weeks. the other thing when I trim the lower scrog these can be used for clones ?

jrainman said:

these can be used for clones ?

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Yes, though that would be a good reason not to wait too long, but if you put those under 24hr light they will veg.

Though I just switched to hydro doing things a bit different, I normally don't feed flower nutes until the 3rd week of 12/12 starts.

Ah understanding thanks for the video ,very helpful in How to do , again thanks .

jrainman said:

...snip...when I trim the lower scrog these can be used for clones ?

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Yes, and if I trim them promptly at the 14 day point (give or take when their stretch is finished), they grow roots quickly! They also don't seem to need to re-veg. Anyway good luck you are asking the right questions.

Sativied said:

I'm not sure what the English term is, still working on my English growers vocab , but we call it thieving (stealing lower branches that would turn out to be popcorn and redirect the energy to denser and bigger buds at the top

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Lollipopping -It's referred to as lollipopping.

-HM420