Is she flowering?

Sorry for not informating u guyz, she almost two months years old. She just stop her grow. Strain Og kush fem. didnt train as much as, tent tempeture usually 26degress when light on humidity around 40-45%. I add nutrients 2 days in a week and also 2 weeks ago inside fan falls down her and main stemp nearly broke buy now she is good.

Hi, Don't turn the lights yet, you are only on week three of grow. Let the plant grow a little more usually 6 or 7 week then you can turn the light to 12 /12. The Plant will grow some white hairs or pistil, usually wait one week and turn my lights to 12/12. if auto flowering, don't worry about the light they will just grow and bloom without changing your lights. For the yellow top leaves, this could be tons of problems so check temp, watering, routine, feeding nutrients, Read the link below and it will def help you with this problems. I will say check nutrients solution ph and increase the veg. Grow nutes. https://www.growweedeasy.com/why-cannabis-leaves-yellow Happy grow!!!!

if you think your plant is big enough to go into flower then sure...i would wait another 2 weeks min. that colour is normal if the leafes and stuff are young it should change to its normal green when the plant grows unless you got some deficency but no worries yours look fine from the pictures i saw keep growing 😋 cheers