First grow! 315 CMH with autos

So I started my first official grow a couple of weeks ago. Started with 6 seedling 3 sour diesel haze autos and 3 amnesia haze autos. One of the amnesias didn't make it out so my original plan to run 3 2gals went out the door so I swapped to 3 gals to make up for the loss of one plant. I'm kind of worried my one Phantom 315 isn't going to suffice but if I don't train at all I figured it would be alright. I'm also unsure of the feeding on autos so I've also included the feeding chart which recommends 1/2 strength nutes the entire lifecycle. I'm open to constructive criticism and guidance to bigger and better yields.

Specs
4x4
315 phantom CMH with Phillips bulb 3100k
5x3 gal auto pots
3 part general hydroponic nutes

Nearing then end of week 3 can't help but feel they look a tad small.

Your using a bulb used mainly.in flowering. It has a lot more red (for flowering), vs a 3k bulb for veg (more blue). That could be the reason those haven't taken off. I get huge veg growth, so much I cut 2 weeks off my Normal veg times.

DemonTrich said:

Your using a bulb used mainly.in flowering. It has a lot more red (for flowering), vs a 3k bulb for veg (more blue). That could be the reason those haven't taken off. I get huge veg growth, so much I cut 2 weeks off my Normal veg times.

Click to expand...

Yea, but the spectrum of the 3k bulb has about 20-30% less blue but I'm not worried about the bulb at the moment. Also the 4K bulbs are for veg not the 3k!

I had my post mixed up.
4k for veg
3k for flower