Do I need to prune?

First time grower. I have 4 fem plants going(unknown strain). They are 33 days old td. They are growing really bushy and not tall at all. Do I need to prune these gals up? I want to go into flowering in a little less than 2 weeks.

Setup:
432w T5 fixture
Intake, Osilating, exhaust fan
FF trio nutes
Ph water 6.1-6.5
Temps 80-90
Hum 30-40%
 

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I wouldnt yet if you plan on taking clones. A couple more weeks and you could get a few off the bottom.
 
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