Does anyone know what it needs?

Did you just flip to flower or is that your internode length? Maybe needs more light. Or maybe some nitrogen, the leafs are kind of light green. What medium are you
Using? And what lights And what nutrients ?

U check for bugs?

Lack of nutes and lights

They are reaching for the light...and the yellow color on leaves is from too much or too less nutes

Light

Brucebigbuds said:

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Cut them in half then feed higher dose try control height better

It looks like it needs work from pic. Trimming, just needs to make sure the right lighting, nutrients, ph, I cant say without seeing whole plant!

Yep, you offer no pertinent info for getting proper advice .

Magnesium and calcium possibly

Smithchronic said:

Magnesium and calcium possibly

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Be careful to not misdiagnose deficiencies for lock outs and nutrients lock out do you check your PH