Supplement the sun with HPS during late fall

Stiickygreen said:
No contradictions. You just need to learn more about how/why these plants flower.

Cannabis plants are short day plants...meaning they recognize the diminishing light as well as the total daylight they receive. Any cannabis plant outside long enough in diminishing light (per day) will likely flower. 12/12 is just the indoor flip gig. Plants can and do flower with far more light per day than 12 hours. Mine are in full flower and I noticed the lightness in the tips (starting to flip) July 25th. The webpage says we have 13 hours and 7 mins of visible light right now....and it was right at 14 hours per day when they went into flower. Were you really expecting them to stay in veg outdoors in September?

Either way...good luck with the finish.
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What area of he country are you in? I heard from many growers here in this area including my own experience this year that the plants began to flower much sooner for some reason?
 
Colorado. It's all a guess but I think my plants started the transition about.July 20. (placed outside on June 13th, grown from fem seeds that were started on May 1) I had friends here from Ohio in the first week of August and the buds were >just< starting to tighten/form. I was shooting for harvest on Sept 30 and we are going to make it right on schedule.
 
sunchaser77 said:
What area of he country are you in? I heard from many growers here in this area including my own experience this year that the plants began to flower much sooner for some reason?
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I'm in NW Florida, and my plants flowered early this year. We had very little sun in June, so that may be the reason.

But flowering plants need long hours of dark. If you can't run the lights in the greenhouse during the day, I would not give them any additional hours of light. You will risk reveg if the nights are too short.

Maybe run them for 3-4 hours during the middle of the day. The extra light will help and it won't fuck up your light hours.
 
Don't add light to outdoor flowering plants if you dont NEED to. They don't go on the same schedule as indoor at all. It knows it's outside and days are getting shorter and colder.
 
too larry said:
I'm in NW Florida, and my plants flowered early this year. We had very little sun in June, so that may be the reason.

But flowering plants need long hours of dark. If you can't run the lights in the greenhouse during the day, I would not give them any additional hours of light. You will risk reveg if the nights are too short.

Maybe run them for 3-4 hours during the middle of the day. The extra light will help and it won't fuck up your light hours.
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Yes. I'll be coordinating it to overlap with say the last hour of indirect light. Here in michigan that would mean I'd move them into the shed and hit the lights at about 7pm. It will still b light outside but it'll be indirect light and fading. From 7pm to 9pm they can get extra light. Then They sit in the dark from 9pm until about 830 when I bring them back out into the outdoors. The indirect light starts coming out at about 730am. The direct light starts hitting their outside greenhouse at about 830am. Would this work?
 
too larry said:
I'm in NW Florida, and my plants flowered early this year. We had very little sun in June, so that may be the reason.

But flowering plants need long hours of dark. If you can't run the lights in the greenhouse during the day, I would not give them any additional hours of light. You will risk reveg if the nights are too short.

Maybe run them for 3-4 hours during the middle of the day. The extra light will help and it won't fuck up your light hours.[/
Let me say it this way instead..... right now I have indirect light from about 730am to 745 pm. Direct light in the area where the plants live right now is from about 830am to 545pm. So they will get direct light from 830am to 545pm (about 9hrs). Should I send them right into the shed at 545pm until 745pm when the indirect light is gone? This is kind of what U r suggesting isn't it? This may be the correct way to do this?
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too larry said:
I'm in NW Florida, and my plants flowered early this year. We had very little sun in June, so that may be the reason.

But flowering plants need long hours of dark. If you can't run the lights in the greenhouse during the day, I would not give them any additional hours of light. You will risk reveg if the nights are too short.

Maybe run them for 3-4 hours during the middle of the day. The extra light will help and it won't fuck up your light hours.
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Btw, I have family in Jacksonville. Love it down there.
 
CriticalCheeze said:
Don't add light to outdoor flowering plants if you dont NEED to. They don't go on the same schedule as indoor at all. It knows it's outside and days are getting shorter and colder.
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Ok well here's my question. I will need a good 2 weeks of sun in November to finish these plants. Based on the weakness of the sun by November, my question is..... do I even need to supplement? Or will the low amount of sun in nov be enough?
 
sunchaser77 said:
Ok well here's my question. I will need a good 2 weeks of sun in November to finish these plants. Based on the weakness of the sun by November, my question is..... do I even need to supplement? Or will the low amount of sun in nov be enough?
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A sunny day in November will still be more than any grow light will provide.
You could add lights if you wish, personally i would not. I would just keep them warm the last couple weeks and the moisture off as much as possible. Which a greenhouse will do for you. Just keep the air moving.
 
CriticalCheeze said:
A sunny day in November will still be more than any grow light will provide.
You could add lights if you wish, personally i would not. I would just keep them warm the last couple weeks and the moisture off as much as possible. Which a greenhouse will do for you. Just keep the air moving.
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Sounds great. That answers the question. I should've just asked it that way in the first place. Keep it simple. Now will the harvest be somewhat smaller due to the limited sun?
 
Adding hps lights to a greenhouse in November with no exhaust system will create major humidity. Just leave them alone, if it ain't broke don't fix it.
 
CriticalCheeze said:
A sunny day in November will still be more than any grow light will provide.
You could add lights if you wish, personally i would not. I would just keep them warm the last couple weeks and the moisture off as much as possible. Which a greenhouse will do for you. Just keep the air moving.
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I wouldn't even be in this mess but get this.... I had a seedling hardening over outside the first week of June. One day I left her out a little long and right at where her one tooth seed leaf meets the stem she started to form what looked like a blister and the seed leaf like bent itself backward and was shielding the blister. The other seed leaf also twisted around and was basically acting and looking exactly as a shield, shielding the blister. So I got her in the shade. The next day I put her out and kept my eye on her. Long story short is that she recovered great but in that area there was some sort of an explosion. Another top grew from that point. At first it just looked like a bunch of leaves clumped together (I figured she was gonna grow all crazy and I'd have to put her down), but after a few days it was clear that another top had started. A few days later I noticed that there was another top starting. It happened again a few days later. In the end there's 4 tops. It's one stem from the ground, then it divides into 2, and then from one side it divides again and from that divided branch it divides one more time. It's the damnedest looking thing you've ever seen. But the point is that 1. It grew a little slower as its growing all these tops and 2. I gotta see how much yield I can get outta this thing. It might be a once in a lifetime thing.
 
sunchaser77 said:
That's what I meant to ask. How would the limited sun affect the yield.
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It doesn't really matter, one year you can grow a three pounder next year you only get one. You're at the mercy of mother nature so it is what it is. Even if you know everything you're supposed to know, growing outside is a gamble. Just let it grow and assess the situation for next year. That way you can have a starting point and make the proper adjustments.
 
sunchaser77 said:
Yes. I'll be coordinating it to overlap with say the last hour of indirect light. Here in michigan that would mean I'd move them into the shed and hit the lights at about 7pm. It will still b light outside but it'll be indirect light and fading. From 7pm to 9pm they can get extra light. Then They sit in the dark from 9pm until about 830 when I bring them back out into the outdoors. The indirect light starts coming out at about 730am. The direct light starts hitting their outside greenhouse at about 830am. Would this work?
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I wouldn't mess with the natural light hours at all. Changing the light hours around will not bring anything good. Reveg would be the most likely, but it is also possible your plant will change it's name to Herman.

There will be a lot of real problems to worry about before then. You will have to deal with them as they show up, or you won't get into November. This time of year is rough on outdoor growers. Just look at a few of the threads in this section. Experienced growers are fighting tooth and nail trying to save their crops. Many of them {like me} are not coming out on the winning end of that fight.

In the future, if you see one plant can't meet your needs, plant two. {I just put 70 seeds in soil for my fall/winter crop. I hope to have 15 or so keepers from them}
 
too larry said:
And how do the trees get so tall? I've often wondered. . . . .
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Chance. Wind blows just right breaking a branch off a taller tree that's blockin it's sun. A wind storm in the spring thins out the forest a little allowing new sunlight to hit the floor for a year or two. Very cool to think about and to see.
 
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