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Mushrooms, Mycology and Psychedelics > The Ethnobotanical Garden
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Gibberellic acid femenized seeds?
    #13628353 -

At what concentration and when is Gibberellic Acid applied to make feminized cannabis seeds?(can't find much with either the search engine or Google)

Also, at what concentrations does it help germinate difficult seeds?


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             :crazykitty:

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Re: Gibberellic acid femenized seeds? [Re: ninja cat 09]
    #13629543 -

Didn't know they were using GA3 to produce feminized seeds these days. I only know of the method where you let the females over mature so they can produce their "emergency bananas" and then use these to produce seeds on another younger female.

As for GA3 recipes it depends on the seeds you're trying to germinate and most formulations use anywhere between 5-35ppm(parts per million).


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My Ethnobotanical Growing TeksWhere to Start Flow Chart, QnA, and helpful links

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Re: Gibberellic acid femenized seeds? [Re: karode13]
    #13630236 -

You'll need around a 50 ppm solution of gibberelic acid to promote male flowers on an unstressed female plant. If the plant has hermaphroditic tendencies this can possibly lead to the entire plant going Hermy which I don't suggest. You're introducing a hormone that is easily absorbed and spreads throughout the plant.

Alternatively you can use colloidal silver at around the same ppm/strength to promote male flowering on a cannabis plant. I notice this tends to keep the male flowers at the point of contact with the solution. So you only get seeds in the area you spray and bag over. Within a couple weeks remove the bag, pinch back the flowers and the plant shouldn't produce anymore male flowers. Giving you your seed stock for next time and keep the rest of the plant Sensi...

I prefer the colloidal silver as I make it myself anyways.

Edited by JonnyBtreed (12/14/10 08:44 AM)

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Re: Gibberellic acid femenized seeds? [Re: JonnyBtreed]
    #13630243 -

JonnyBtreed said:
You'll need around a 50 ppm solution of gibberelic acid to promote male flowers on an unstressed female plant. If the plant has hermaphroditic tendencies this can possibly lead to the entire plant going Hermy which I don't suggest. You're introducing a hormone that is easily absorbed and spreads throughout the plant.

Alternatively you can use colloidal silver at around the same ppm/strength to promote male flowering on a cannabis plant. I notice this tends to keep the male flowers at the point of contact with the solution. So you only get seeds in the area you spray and bag over. Within a couple weeks remove the back, pinch back the flowers and the plant shouldn't produce anymore male flowers. Giving you your seed stock for next time and keep the rest of the plant Sensi...

I prefer the colloidal silver as I make it myself anyways.


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Re: Gibberellic acid femenized seeds? [Re: JonnyBtreed]
    #13630255 -

And not to get too technical, but you really want the pollen of one plant that was "turned" hermie to pollinate another female plant. This really cuts down on the likelihood of your seeds being a higher percentage hermaphrodite, which is a royal pita.

In which case all you have to do is spray the tip of a branch, put a bag over it, wait for male flowers, cut the male pollen bracts out into a small film canister or something of the like, then brush those onto another plants pistils. You can then pinch off any remaining male flowers and be all set.

Anyways, good luck with it man.

Oh and on an somewhat related side note. If anybody has an issue with a strain they really like but has hermie tendencies, Dutch Masters makes a product called "reverse", which when sprayed early into flowering will destroy any male flower starts and prevent any from coming out later. I've found 2-3 treatments early on in flowering to be the most effective.

So what I do is after treating with the silver, I get my male flowers, cut/pinch them off, then treat with reverse. And I don't have to worry about seeds I don't want.

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Re: Gibberellic acid femenized seeds? [Re: JonnyBtreed]
    #13630298 -

JonnyBtreed said:
You'll need around a 50 ppm solution of gibberelic acid to promote male flowers on an unstressed female plant. If the plant has hermaphroditic tendencies this can possibly lead to the entire plant going Hermy which I don't suggest. You're introducing a hormone that is easily absorbed and spreads throughout the plant.


Does it only need 1 application?

When?

Is it ok to smoke gibberllic acid-treated bud?


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             :crazykitty:

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Re: Gibberellic acid femenized seeds? [Re: ninja cat 09]
    #13630323 -

ninja cat 09 said:
JonnyBtreed said:
You'll need around a 50 ppm solution of gibberelic acid to promote male flowers on an unstressed female plant. If the plant has hermaphroditic tendencies this can possibly lead to the entire plant going Hermy which I don't suggest. You're introducing a hormone that is easily absorbed and spreads throughout the plant.


Does it only need 1 application?

When?

Is it ok to smoke gibberllic acid-treated bud?


I'd say about 2-3 applications. Same as the colloidal silver. You want to start these applications the week the plant goes into flowering. And spray every 5-6 days until you start to see the formation of the male flowers.

As far as the safety of gibberelic acid is concerned. I would think it to be safe at that amount. It's a synthetic plant hormone. The chemical is already produced in the plants. Just not to the extent of what your spraying on it. It is a gibberelin which is responsible for many things, but primarily in the assembly/production of cells for growth.

You could almost consider it a sort of plant steroid. In much much smaller amounts it can be used simply to facilitate growth, although it does develope a tolerance to it which can cause growth problems/mutations in the future if the amount is continually increased.

It can't be good for the plant in the doses we're exposing it too, but consider what we're doing. We're growing male reproductive parts on a 100% female...

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Re: Gibberellic acid femenized seeds? [Re: JonnyBtreed]
    #13630331 -

And as far as smoking it, I wouldn't be too concerned as your spraying it on the plant before it develops the bud that your actually going to be smoking. So I'd think you'd be fine.

Although most of the people that I know that self feminize cut the branches off after converting for fear of the branch creating more male pollen which they might not notice. Possibly "destroying" the rest of the crop. they just don't want the seeds... :shrug:

As I said I've only used gibberellic acid once or twice and colloidal silver the rest of the time, so I'd say do some research and do what you feel to be safe.

I drink almost an oz of colloidal silver a day, so I'm not fazed in the least by smoking it.

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Mushrooms, Mycology and Psychedelics > The Ethnobotanical Garden
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