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Put it this way: The very mimimum I would suggest is having them in 3 litre pots.
When roots don't have room to grow, the plant stops growing too.
That in itself will move them further away than they are now.

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faithlessxxx Reviewed by faithlessxxx on . 2 Weeks Old (Pics) Questions on Space & Light The Cannabis is 2 weeks old now, great growth ,great vegitation, my only 2 concerns are the amount of room between the 4 plants, are the overlaping branches and the foliage going to kill or inhibit growth dramaticly? Aslo, how far should i keep the light away from the plant at this stage of growth? what is a good distance to keep it away so to increase vertical growth upwards? Im using cool white Daylight Floros. no heat at all generated by them. **I will post larger pics later so Rating: 5