Fact or Fiction, can environmental conditions effect a plants sex?

[layten69]

i read this on another site and i thought i would bring it up for discussion here. over on grass city there was a post about germination that i was reading, at the end of the post it said "How to grow more female plants from seeds" followed by this:


Environmental factors start influencing sex the moment the seedling has three pairs of true leaves (not counting cotyledon). Environmental factors that influence sex determination of cannabis include but are not limited to:

Increasing the level of nitrogen makes more female plants. Lower the nitrogen level to create more male plants. Increase the level of potassium to increase male tendencies; lowering the potassium level encourages female plants. A higher nitrogen level and a lower potassium level for the first two weeks increases females.

Low temperatures increase the number of female plants. Warm temperatures make more male plants.

High humidity increases the number of female plants. Low humidity increases male plants.

Low growing-medium moisture increases males.

More blue light increases the number of female plants. More red light increases male tendencies.

Fewer hours of daylight (e.g. 14 hours) increases the number of females. Longer days (e.g. 18 hours) make
more male plants. Stress: any environmental stress tends to yield more male plants when growing from seed.

My question is, is this true? i have never herd this before and im not sure if i believe it. what do you all think?

layten69 Reviewed by layten69 on 03-22-2012. Fact or Fiction, can environmental conditions effect a plants sex? i read this on another site and i thought i would bring it up for discussion here. over on grass city there was a post about germination that i was reading, at the end of the post it said "How to grow more female plants from seeds" followed by this: Environmental factors start influencing sex the moment the seedling has three pairs of true leaves (not counting cotyledon). Environmental factors that influence sex determination of cannabis include but are not limited to: Increasing the Rating: 5

[mathematics1900]

i read this on another site and i thought i would bring it up for discussion here. over on grass city there was a post about germination that i was reading, at the end of the post it said "How to grow more female plants from seeds" followed by this:


Environmental factors start influencing sex the moment the seedling has three pairs of true leaves (not counting cotyledon). Environmental factors that influence sex determination of cannabis include but are not limited to:

Increasing the level of nitrogen makes more female plants. Lower the nitrogen level to create more male plants. Increase the level of potassium to increase male tendencies; lowering the potassium level encourages female plants. A higher nitrogen level and a lower potassium level for the first two weeks increases females.

Low temperatures increase the number of female plants. Warm temperatures make more male plants.

High humidity increases the number of female plants. Low humidity increases male plants.

Low growing-medium moisture increases males.

More blue light increases the number of female plants. More red light increases male tendencies.

Fewer hours of daylight (e.g. 14 hours) increases the number of females. Longer days (e.g. 18 hours) make
more male plants. Stress: any environmental stress tends to yield more male plants when growing from seed.

My question is, is this true? i have never herd this before and im not sure if i believe it. what do you all think?

I doubt anyone here has in depth knowledge of plant biology or the advanced topics of horticulture. If you can't find any information on this in any scientific journals pertaining to plant biology then it is probably just misinformation spread by the marijuana community.