IT depends on what you have space/time for.
If you have time and a spot to keep a prop dome under constant light and nice and cozy, by all means pinch the tops, wait another 1-2 weeks for that side growth to get stronger, cut clones, LABEL THEM, wait another 2 weeks for the plants to get over the shock, and flower away.
Don't cheat yourself by taking small wimpy clones. They should have a growing tip, 2 fan leaves cut down to 1" blades, and a stripped node further down the stem. That's pretty much a minimum for healthy clones.
Your plants do not appear sexually mature yet, so flowering now isn't going to get you too far- it will take longer for sex to show, and you can be adding undue stress.
Doing the clones in a week or 2, you are givine the plants time to mature, and giving yourself the option of skipping the whole seedling-rearing/sexing step on your next grow.
stinkyattic Reviewed by stinkyattic on . first grow...any help is appreciated ok so this is my first grow...5 of them sprouted around jan 14th and the other 7 sprouted around jan 25th. im using 2 175 watt metal halides and 2 40 watt tube flouros. i built a box that is 6' long 4' wide and 6' tall.. up until last night i had the light on 24 hours straight and now ive got them on a 20/4 light cycle. i had some problems last week with nute burns so i had to clip off some leaves but i flushed them twice and they seem to be doing better...some of the tips are still turning Rating: 5