plants not flowering.

[thurston]

I switched my lights from 18/6 to 12/12 18 days ago and they are not flowering. I also switched my main nutrient from fox farm big grow to tiger bloom at the same time. I also use calmag and liquid karma. How long does it take until they start to flower? This is my first indoor grow.

 

[xX Kid Twist Xx]

how old are the plants are they from seed or clone? what are they indica, sativa? and is your room completly dark wehn lights go off?

 

[ibTheMan]

May be you got some long ass bud'n weed, but no matter what you should be see'n somethin.
Got pics? what strain, these r things we need to know.
And what Kid^ said about the light.

 

[MakinGoo]

I bet it's not completely dark in ur room.. Prolly some kind of light leak keeping ur plants from going 2 sleep..

 

[420king-MASSES]

maybe your growing rope not dope

 

[the rrock]

ive had some sats go 30 days without flowering or showing sex,but usually its from 7-10 days if from seed.try 10/14 see if that helps

 

[wonka]

how old are the plants are they from seed or clone? what are they indica, sativa? and is your room completly dark wehn lights go off?

^

 

[SSHZ]

Sound like either too much nitrogen or a light leak somewhere....... is the main stem stretching upwards?