New Grower Are male seedlings usually bigger?

[Musturd]

First time with regular seeds, I have 2 .8 gal airpots. I have room for both but really want to insure at least 1 girl. I will start in cups and tier. My plan is to start 3, and at 7-10 days kill the largest and pot the other 2 then wait for sex. No plans for breeding.....yet.

I have not taken them to sex in a cup yet, did not want to stop the taproot at all.

Make sense? Any advise?

 

[The Squid]

IME, I see that Most of the time(around 70-75% of the time) that males show more vigor and growth in the early stages of growth, but not always the case at all. I read about this a lot and then just saw it for myself over time.

Considering the time it takes them to sex, I would keep all three. With that being said, I have a pretty solid 50/50 ratio. Meaning if I wanted to end up with 4 females I am starting 8 beans. Sometimes I get 5-6 females, sometimes 3-4, but a pretty good average that has worked for me.

 

[omnious]

I can't say anything to size department, first grow and all, but definite yes to that 50/50 ratio. I got 16 germinated and sitting with 8 girls now.

 

[happily]

Many of my lowberrys the girls take off faster. Take them all the way to sex in a cup or something but I wouldn't cut the big ones down especially if it's female. It would be your best female. Cutting down a big female and keeping runty males wouldn't be any fun. I start in a 1" rockwool cube and move to 3" rockwool cube directly in dirt and I'm hitting about 50 fems to 20 males over the last year

 

[GoAuto6]

I would go all the way to sex if you use a 32 or 64 oz cup it'll take you all the way to, and past sexing.........

 

[Musturd]

I would go all the way to sex if you use a 32 or 64 oz cup it'll take you all the way to, and past sexing.........

I like this GA I think we will start in 32oz

 

[InHumboldt]

The old practice of sending three beans was because statistically the odds of, two females, or two males, was too high. 3 was the number to get good odds of at least 1 female.

 

[InHumboldt]

Back to your original question. I do note that males have more vegetative vigor in length. But if let to go large they have less total mass than a female of the same height. They will attempt to grow tall fast then bloom first making high thrusting colas.

Evidently nitrogen can effect sex, or so it's been said.

You can't change a seeds sex but you can bias the survival rate aka female seeds didn't germ as well as males.

 

[thud]

The old practice of sending three beans was because statistically the odds of, two females, or two males, was too high. 3 was the number to get good odds of at least 1 female.

http://stattrek.com/online-calculator/binomial.aspx

Probability of success on a single trial: Always 0.5 since the probability of males and females is the same.
Number of trials: The number of seedlings you will grow.
Number of successes. The number of females you want.

Thus if we have 15 seedlings, we have a 94% (Cumulative Probability: P(X > 5)) of obtaining at least 5 females.

 

[omnious]

About the growth... I was distracted by the word 'size'. Mine were all the same size, except males showed different development on the tip/head of the plant. Males were more "pointy" there, that point then forming to balls, where as females had more of a "cup" tip.