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 Farmer Joe
 
Registered: 09/03/09
Posts: 1,707
Loc: USA 
Last seen: 2 years, 30 days
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 sexed under 24 hrs light? 
#349226 - 01/18/10 07:47 AM (14 years, 10 months ago) |
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I thought I read in a post somewhere that it is possible when maturity is reached. I searched the main site and forum, but no dice. Haven't googled it yet. I'm sure it is just something very common that I happen to know nothing about. (Only have experience growing with clones)
Currently growing mandala's early queen, mr. nice speed queen, ppp and 3 fem'd ww from nirvana.
Out of 5 ppp 3 have shown sex and 1 was male.
2 out of 8 mandalas have turned out male.
1 mr. Nice turned out female.
Plants have been under a ho t5 setup. Light cycle has been at 24 hrs. Going on 40 or so days.
I was trying to let a few smaller runts catch up to the other healthy stronger (prob male) ones. We switched the light cycle last night to 12/12.
Hit me up with some info.
Thanks ahead of time.
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"Marijuana may not be addictive, but growing it is" - ED Rosenthal
Maine Caregiver In 100% compliance with Maine state laws.
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 DrGreenThumb
Registered: 08/09/08
Posts: 487
Loc: Phish Tour
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Re: sexed under 24 hrs light? [Re: Farmer Joe]
#349229 - 01/18/10 08:03 AM (14 years, 10 months ago) |
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Yes definitely possible. When your palnts are 4-6 weeks old usually they will show preflowers. These are located on the main stem where the branches meet the stem. Female preflowers consist of 1 calyx with 2 tiny hairs coming out it.
When your plant matures enough in veg it should be no problem to tell their sex before flowering.
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“Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” -Dr. Seuss
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Farmer Joe
Registered: 09/03/09
Posts: 1,707
Loc: USA
Last seen: 2 years, 30 days
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Re: sexed under 24 hrs light? [Re: DrGreenThumb]
#349242 - 01/18/10 09:00 AM (14 years, 10 months ago) |
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Thanks 
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"Marijuana may not be addictive, but growing it is" - ED Rosenthal
Maine Caregiver In 100% compliance with Maine state laws.
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Inverted
CNC Machinist/Greenthumb
Registered: 06/01/08
Posts: 9,953
Loc: North Star
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Re: sexed under 24 hrs light? [Re: Farmer Joe]
#349401 - 01/18/10 03:02 PM (14 years, 10 months ago) |
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Actually sooner than 4-6 weeks with optimal growth and knowledge of early preflowers.
If I consider it to be a smooth run, I can usually sex the plants between 20-26 days from popping the surface. You just have to be really comfortable with identifying males from females from first emergence.
I female will generally look like a green pin coming out of the node, where as a male will look like a green grain of sand, more round than anything. (EDIT - Do not confuse the pin with the Stipules (green spikes) which are much larger)
99 out of 100 times I have correctly identified them using that as a reference. I would take pictures but it's almost not worth it because they can be so small when I make the decision. Males almost always show first by a week anyways so if they show me a little tiny round grain, they get tossed, otherwise they will have a tiny pin like thing and will eventually shoot out a set of hairs from that soon to be calyx.
When in doubt let it sit a few more days. It would take a couple weeks after sexing for a male to even be able to open a sack.
Long story short, they start showing after 3 weeks, males first (usually) regardless of the light cycle. The plants I flowered before showing sex had a much harder time transitioning to flower production than the plants that had visible pistils going into 12/12.
That's why this run I'm waiting an additional 2 weeks to ensure the plants live up to their potential and yield.
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Don't criticize what you can't understand
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DrGreenThumb
Registered: 08/09/08
Posts: 487
Loc: Phish Tour
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Re: sexed under 24 hrs light? [Re: Inverted]
#349409 - 01/18/10 03:15 PM (14 years, 10 months ago) |
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I agree with you there Inverted. I can usually tell by week 3 but you have to know what your looking for. However, I always wait until I see the hairs before I make a decision since small plants don't take up much room in my veg closet anyways.
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“Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” -Dr. Seuss
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Inverted
CNC Machinist/Greenthumb
Registered: 06/01/08
Posts: 9,953
Loc: North Star
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Re: sexed under 24 hrs light? [Re: DrGreenThumb]
#349427 - 01/18/10 03:47 PM (14 years, 10 months ago) |
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You got it down DGT. I usually can not ever spare any room so I am always racing to find out the sex.
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Don't criticize what you can't understand
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coda
Registered: 04/20/08
Posts: 4,736
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Re: sexed under 24 hrs light? [Re: Inverted]
#349485 - 01/18/10 04:46 PM (14 years, 10 months ago) |
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Quote:
The plants I flowered before showing sex had a much harder time transitioning to flower production than the plants that had visible pistils going into 12/12.
This is mainly due to the fact that plants that haven't shown sex before flowering are usually not sexually mature. So the plant requires a little extra time to produce the flowering hormones. There are some out there who believe flowering before pre-flowers increases hermaphrodite chances, but I haven't seen any solid evidence to back that up. Plus there are plenty of people who go straight from sprout to flower to keep things small.
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MFDoom666: sobriety kills my buzz every time.
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Farmer Joe
Registered: 09/03/09
Posts: 1,707
Loc: USA
Last seen: 2 years, 30 days
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Re: sexed under 24 hrs light? [Re: Inverted]
#350058 - 01/19/10 05:12 AM (14 years, 10 months ago) |
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Thanks for the info inverted. Much appreciated.
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"Marijuana may not be addictive, but growing it is" - ED Rosenthal
Maine Caregiver In 100% compliance with Maine state laws.
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Inverted
CNC Machinist/Greenthumb
Registered: 06/01/08
Posts: 9,953
Loc: North Star
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Re: sexed under 24 hrs light? [Re: Farmer Joe]
#350148 - 01/19/10 12:22 PM (14 years, 10 months ago) |
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Quote:
coda said:
Quote:
The plants I flowered before showing sex had a much harder time transitioning to flower production than the plants that had visible pistils going into 12/12.
This is mainly due to the fact that plants that haven't shown sex before flowering are usually not sexually mature. So the plant requires a little extra time to produce the flowering hormones. There are some out there who believe flowering before pre-flowers increases hermaphrodite chances, but I haven't seen any solid evidence to back that up. Plus there are plenty of people who go straight from sprout to flower to keep things small.
That's the assumption I had come up with as well. I was fairly disappointed as this was the first time I've ever flowered plants that were not sexually mature. I'm bumping the veg time up from 31/2 to 5+ weeks with my next set. They are on day 24, So I'd say they'll head in a couple days after the current harvest occurs.
Quote:
Farmer Joe said:
Thanks for the info inverted. Much appreciated.
No problem man, I try to provide as much personal experience as possible, because that way I can at least tell you which has worked best for me, possibly saving people from making decisions that have dragged me down. I get a lot of joy from helping others!
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Don't criticize what you can't understand
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