Logan Burke
Well-Known Member
Did your 600w have a cooltube?
Putting cmh to the test
- Thread starter growingforfun
- Start date
growingforfun
Well-Known Member
Small update. The veg area is better than it's been in years. I could be wrong but I'd say thing look better with my cmh than they did with my 1kw mh. Plants that were in 2qt containers are now taller than me in 5g pots and lush as can be.
The flowering area is looking fantastic. I havent noticed any change in nutrient needs so far as cal/mag like other report but that could be because I changed the light halfway through vs the full run. I am getting a little purple earlier than normal and red hairs earlier than normal.
I have 15 days left in the cycle so in 20 days i should have weights in.
The flowering area is looking fantastic. I havent noticed any change in nutrient needs so far as cal/mag like other report but that could be because I changed the light halfway through vs the full run. I am getting a little purple earlier than normal and red hairs earlier than normal.
I have 15 days left in the cycle so in 20 days i should have weights in.
Logan Burke
Well-Known Member
Sounds good, happy growing can't wait to hear the numbers on weight!
rkymtnman
Well-Known Member
which bulbs are you using for the cmh's? 3.1 k for bloom and 4.2k for veg?
growingforfun
Well-Known Member
3k flower 3.5k veg
rkymtnman
Well-Known Member
and as a fyi, if you are used to this strain under hps, it will finish faster under cmh. i only did 2 of the same strains under hps and then cmh and both finished about 5 days quicker. not sure if that is proof positive but keep your eyes out
growingforfun
Well-Known Member
Ya I've ran this clone maybe 7 cycles ish under hps. It is looking to be ripening up a little faster but I do still want to take it to 70 at least. I've been wanting to take it closer to 80 under hps but I kept struggling to let it go past 70. Everything is looking healthy and well supported this run so I'm not concerned with mold from buds laying on each other like in past runs.
rkymtnman
Well-Known Member
post the results. i'd betcha that you'll obviously lack the weight but the quality will be definitely 2 steps up from hps.
growingforfun
Well-Known Member
Will do. Honestly doesnt look much less than from hps. The first half the run being hps got the budsites form and the cmh did just fine letting them continue to fill in.
Time will tell be I think its gonna come close to my 20 oz average. The average watts used based on the portion of time under 1kw hps and 315 cmh will be 700 watts after 70 days.
Lucky Luke
Well-Known Member
i had a cool tube then went to an air cooled XXXL hood but to get maximum light I then took off the glass.
FriskyDisco
New Member
If the broader spectrum of the CMH is providing better growth efficiency of you plants they will require more nutes especially CaMg since CaMG is a catalyst for nutrient uptake. It also depends on your medium. If you are using coco CaMg is a necessity since coco tends to leech CaMg. Hope your grow goes amazing...
ttystikk
Well-Known Member
'Cal mag' is calcium nitrate and magnesium nitrate. The nitrate boosts plant growth.
A little knowledge can be a dangerous thing.
Logan Burke
Well-Known Member
I know that I'm seeming to get rust spots while using my CMH lights...could be due to something else that's coincidentally showing symtpoms now, could be due to the increased spectrum. In any event, the rust has subsided with a slightly elevated PH and supplementation of calmag. I'm in hydroponics, so it's not uncommon to need calmag supplementation. It's just rare for me, using Floranova I typically don't need supplements.
growingforfun
Well-Known Member
Another update: I'm now aprox 10 days from chop but may be able to let them go longer since theres great airflow and the buds are all well supported. The buds have all taken on a nice purple tone that I wouldnt normally see expect one time when i harvested the top of the plant and let the bottom larf go another 3 ish weeks. It never really got good but I wanted to see what happened. Anyways, I'm happy to see the color at day 60 from flip!
The hairs are nearly all darkened but new ones are shooting and the buds are still growing, so I really would like to try and take it to 77 an see.
My results have been so good I'm tempted to try and get others to try running 1kw hps the first half and switching to 315 cmh the second half of flower. Obviously I'd do that AFTER i do a full run under the 315 cmh.
I'm sure you all can tell I'm very impressed and excited with the results I'm getting
The hairs are nearly all darkened but new ones are shooting and the buds are still growing, so I really would like to try and take it to 77 an see.
My results have been so good I'm tempted to try and get others to try running 1kw hps the first half and switching to 315 cmh the second half of flower. Obviously I'd do that AFTER i do a full run under the 315 cmh.
I'm sure you all can tell I'm very impressed and excited with the results I'm getting
turbobuzz
Well-Known Member
I'm on my first 315 CMH grow updating from t5 and cheap led's. I won't be going back to that. The CMH rules. No comparison. This was day 42 flowering on a 65" plant ( never grew sativa before, wasn't prepared for the stretch. Flipped at 16"). The CMH is keeping up pretty well with the height.
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growingforfun
Well-Known Member
Can you post the photo in the thread I cant view photos posted that way
growingforfun
Well-Known Member
So bad news from my corner of the world.
Today's update is a sad one. As I mentioned several posts up the plants under my cmh get some side lighting from hps that comes on a hour earlier and stay on a hour later. The cmh is only on 10 hours) I figured it was enough light it wouldnt be concidered a light leak, but more light dawn and dusk. I guess I was wrong. Today I saw new clusters of hairs and bananas. This clone has tossed bananas is the past, but this is the most I've seen, its normally one or 2 across a 4x4 ish area and I'm seeing small clusters. I cant risk the 5x10 beside it seeding that's around day 30.
In a 24 hour span I went from confident i was going to let it ride another 2 weeks to cutting em down
Today's update is a sad one. As I mentioned several posts up the plants under my cmh get some side lighting from hps that comes on a hour earlier and stay on a hour later. The cmh is only on 10 hours) I figured it was enough light it wouldnt be concidered a light leak, but more light dawn and dusk. I guess I was wrong. Today I saw new clusters of hairs and bananas. This clone has tossed bananas is the past, but this is the most I've seen, its normally one or 2 across a 4x4 ish area and I'm seeing small clusters. I cant risk the 5x10 beside it seeding that's around day 30.
In a 24 hour span I went from confident i was going to let it ride another 2 weeks to cutting em down
Lucky Luke
Well-Known Member
sad news m8So bad news from my corner of the world.
Today's update is a sad one. As I mentioned several posts up the plants under my cmh get some side lighting from hps that comes on a hour earlier and stay on a hour later. The cmh is only on 10 hours) I figured it was enough light it wouldnt be concidered a light leak, but more light dawn and dusk. I guess I was wrong. Today I saw new clusters of hairs and bananas. This clone has tossed bananas is the past, but this is the most I've seen, its normally one or 2 across a 4x4 ish area and I'm seeing small clusters. I cant risk the 5x10 beside it seeding that's around day 30.
In a 24 hour span I went from confident i was going to let it ride another 2 weeks to cutting em down
growingforfun
Well-Known Member
Ya
Atleast things look really good. They look further along at 61 days than last run did at 70. Was just really excited to see how it would look going another 2 weeks
Lucky Luke
Well-Known Member
The CMH are a nice light to work under compared to a HPS. Im loving the difference.
This is a Sky Walker Kush, pic taken just under the CMH and no flash or filters. Beats that yellowish tinge the HPS has.
This is a Sky Walker Kush, pic taken just under the CMH and no flash or filters. Beats that yellowish tinge the HPS has.
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