Can a plant show sex in 18 days of veg look here

[Oat0328]

My plant is 18-21 days old can it start showing sex already? Its my first grow arent they suppose to show sex when I flip to 12/12?

 

[Buckshot]

It may be...but in this pic it is very hard to tell for sure. What strain is it? If it is an "auto" it can bud on 18/6

 

[shottafire]

Was it started from clone? It's unlikely to show sex from seed that fast unless
Like buckshot said autos will flower on 18/6 schedule.

Plant looks good though.

 

[Oat0328]

No its not a auto strain... The name of the strain is Green Giant. Well the lights are on 24hrs a few times I switched it to 18/6,however;since then they have been on for 24rs. I'm assuming its showing its sex but I'm on a look out but look like two "balls" to me.

 

[WizHigh]

What light schedule are you running? I had plants show sex way before I flipped to 12/12. If you run GLR light schedule it will force the plant to show sex during veg. Also it depends on how fast your plants mature. After maturing your plant will also show presex while in veg.