Quote Originally Posted by luvtogrow
C99's a great choice. Go hps in flower for sure. I'd start with floros and go to hps @ week 3 from germ. I grow C99 with every grow it's one of my personal favorites and a great cross too. Have 2 going now under a 600whps imo much worth it over a 400 in terms of production, efficiency, and tight hard nuggets. I get about 3 ozs. per plant, note that they aren't under 1 600 by themselves, usually at least 4 plants from seed under each light in my grows. Currently have 7 strains, 12 plants under 2X600hps and 1 400hps. I veg for @6 weeks and train during veg, as they can get fairly tall. They are the type of plant that let a lot of light pass thru to lower leaves as why 600 would be much better than 400 on C99's. They show sex very early in veg. @week 3. They are hardy and very easy to grow. Finish usually @week7 of 12/12.


I have been growing C99 since Mr Soul first sent out his Princess75's as testers way back in the middle 90's and also always have it in my garden. But 12 plants under 1600W? They are light-lovers but IMHO that's major overkill. I figure mine at 80-100W/sq ft with one plant/sq ft. IOW, in my system i could almost double the number of plants under the same wattage. I used to use 120-150W/sq ft but found no difference with the outcome after cutting down appx 40% of the power usage and also there was less concern about heat along with the time between waterings can be stretched out longer.

Also, I know of no strain that shows sex at 3 weeks from seed. Mine aren't even out of the seedling stage by then! I have some now that are 2 and a half weeks old and they are just now starting their adult leaf sections. I sex mine after alternating branches have started. Most strains have preflowers by then and can be sexed with a magnifying glass.

And be careful about that "49 day flowering time". When the Brothers Grimm were working the flowering time for C99 was about 7 weeks but since the original stock has been used up others have been making knockoffs and the strain has changed a bit over the years (they retired around early 2001). I suggest planning on 8-9 weeks. The buds get fatter with denser nuggets if given that extra 10 days or so. Try it with your next C99 harvest. Take a plant or two at 7 weeks but save the bulk for a later harvest. I'm sure you'll like the results better with just a little more patience.