Can the Environment influence the Gender?

[FrozenChozen]

I know a guy that insists cooler temps during germ make females and warmer temps make males. I just plant and kill the males lol.

what about all the people who germinate on heating mats? they don't seem to have "higher chances" of being male....
I say 75% genetic and 25% environmental + or - 5%

 

[neonknight420]

what about all the people who germinate on heating mats? they don't seem to have "higher chances" of being male....
I say 75% genetic and 25% environmental + or - 5%

Heating mats keep the roots warm not the atmosphere.

 

[FrozenChozen]

Heating mats keep the roots warm not the atmosphere.

which DIRECTLY influences the temperature of the plant.....

 

[ISK]

I started to germinate 12 seeds today, 6 male and 6 female looking seeds as per the chart...the top 5 from each gender will continue.

The top 10 will be grown in a hempy style (Drain to Waste) perlite/vermiculite c/w a soil cap & core, using a 16 ounce Dixie cup.

The female friendly room (ideal environment conditions for a female) ...the 5 male looking seeds will go into this room

• approx 77 F and 70% RH.
• 16/8 light cycle
• 6500K CFL bulbs (blue light)
• General Hydroponics MaxiGro (10-5-14)

The male friendly room (ideal environment conditions for a male) ...the 5 female looking seeds will go into this room

• approx 85 F and 30% RH.
• 20/4 light cycle
• 2700K CFL bulbs (red light)
• General Hydroponics MaxiBloom (5-15-14)

Note: I only plan to grow these until the gender of each is determined.

cheers

 

[Cold$moke]

Very interesting .

 

[ISK]

Germination has not been going well...only have 3 of each sprouted so far...the other 6 seeds are taking their sweet time.

For now I have them in a common room but will soon separate to their appropriate rooms....I have the males on the left side under two 6500K and one 5K...the right side are the females under two 2700 K and one 5K



The Female seeds



The Males

 

[Cold$moke]

Ouch on the germ rate but still look forwrd to the results

 

[ISK]

Ouch on the germ rate but still look forwrd to the results

I'm not happy with the germination rate as I really wanted 10 plants, 5 of each... but I'll continue with the six..... they seem to be progressing well


and the females

 

[ISK]

Started the second room today and have separated the two genders...working on the temp/RH, not quite right yet but getting close

The new female friendly room



getting close to the ideal RH..... but temps are a bit low.....more lights should help


The male friendly room... a bit cool but RH is low......... 77.4 F / 34% RH


The gals are looking good

 

[ISK]

the female friendly room is about 65% RH but still cool at 72 F


The male friendly room is running over 40% RH...and a bit cool

 

[ISK]

girl's room is cool at about 72 F and 60-65% RH


75-76 F and around 40% RH for the male room

 

[ISK]

the RH is looking good and temp are still low but not bad for the girl's room



the temps are lower than I want...but the RH is decent for the male room

 

[ISK]

about a week old, a few pics of side by side



Temp/RH in girl's room


Temp/RH in boy's room

 

[ISK]

I have increased each room to six-23 watt CFL's

Girl's room...four-23 Watt 6500K and two-5000K CFL's


the boy's room....four-2700 watt and two 5000k CFL's

 

[ISK]

pic's from yesterday....I'm getting the temp/RH dialed in now

Female friendly room


male friendly room

 

[ISK]

The girl's room....temp is a touch low but RH is great


The male room has the +80 temps and the RH is so low the meter can't read it (under 20%)



It does appear the plants in the female friendly room are progressing faster than the ones in the male friendly room....but this experiment is all about influencing gender not performance

 

[Blitzedgrowkid08]

Just caught this! Very curious to see the results

 

[ISK]

Just caught this! Very curious to see the results

thanks Blitzed...no idea how it will end up, but having fun with the experiment ....cheers

 

[ISK]

Added an extra pair of 23 watts lights to each room (8 per room total)...would like to flip to flower mode in about a week

the Girl's room (6 x 6500K and 2 x 5000K CFL's) temps around 70-74F.... 65-70% RH


the Boy's room (6 x 2700K and 2 x 5000K CFL's) temps around 79-83F and 20-30% RH


some side by side pics....the plants in the female friendly room are a fair bit bigger than the male friendly room
left side (male seeds/female room)....right side (female seeds/male room)


left side (male seeds/female room)


right side (female seeds/male room)

 

[ISK]

Girl's room


Boy's room