Plants not growing side stems

[AgedMaster]

Does anyone no whats going on with my autoflowers 2 of my plants are not growing side stems there 2 days behind my good 2.
One strain is different to the rest that one is growing fine the bad ones are growing upwards only there just starting to get side stems.
Could it be bad repot do they still grow up sometimes with bad repot i repotted 2 weeks ago there 4 weeks old ive just tied them down and lowered light i also treated them all the same as they grew. 3 of them also look like there starting to flower the smallest and 2 biggest

 

[Mike Wright]

Could be just genetics. I have an Afghani strain that often grows this way.
Here's a pic from a grow I did last year of that strain. Three of the four plants have basically no branches.

 

[AgedMaster]

Hi this was all them 7 days ago my good 2 took off I was waiting for these to do the same. I think they might end up like yours i did grow this strain before it ended up 7ft with 6ft side stems

 

[skirk]

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