Calling all 400 watt veterans

Beansly

RIU Bulldog
Morning fellow followers of the 400 watt lighting philosophy. This is my second indoor grow, first time making it this far, so I was wondering, what is the highest you like to grow your plants with the limitations of the 400 watter? I ask because my Barney's Farm Pineapple Chunk is 29.5 inches now and so far, has grown an inch (or more) everyday since I switched over to 12/12. I only switched it 7 days ago so I have a long time to go and it doesn't look like the plant is slowing down it's vertical stretch. I just dont want them to get so tall that I end up with one whispy cola and a bunch of popcorn. Below is all the details you might need.

:leaf:Garden Specs:leaf:
Im growing in a closet. The measurements are 3ft x 3 1/2ft x 7 1/2ft. I'm using a GrowBright 170 cfm 4" in-line fan w/ 4 pounds activated carbon filter.
Light is a 400 watt air cooled hps with magnetic ballast and Easycool 6 hood. I have one oscillating fan for circulation and a 3" passive intake vent hole. No Co2. Mylar reflective foil.
Plants are in a mix of one bag each Fox Farms Happy Frog, Miracle Grow Organic and a bag of Miracle Grow perlite. Soil in 3 gallon Growbags. Using R/O water. Water 3x a week, with 6.2 - 6.8 pH'ed fertilizer, usually following a schedule of feed, feed, water water. Temperatures are 63-68 degrees Fahrenheit at night, 68 - 89 degrees F during the day. RH is between as low as 21% to 32%.
:leaf::leaf:Fertilizers are as follows::leaf::leaf:
Mad Farmer pH Up [pH buffering]
General Hydroponics pH Down [pH buffering]
Advanced Nutrients Connoisseur A&B [base bloom nutrients]
H&G Roots Exellurator [for healthy and vigorous root growth]
H&G Multi Zyme [disposes residuals in medium; breaks down nutrients]
H&G Bud XL [extracts sugar from leaves & transfers to fruit]
H&G Top Booster [triggers flowering during 4th/5th wk lull]
H&G Magic Green [leaf hardener; protects against pests/disease]
H&G Drip Clean [Makes it impossible for salt to build up in the soil]
SuperThrive
Unsulphered Organic Black-strap Molasses
Western States b-1 vitamin [for transplanting; clone revival]
Botanicare cal/mg+
Fox Farms Grow Big [for veg]

:leaf::leaf::leaf:Strains:leaf::leaf::leaf:
Barney's Farm Pineapple Chunk (Fem.)
Delicious Seeds Il Diavolo Automatic (Fem.)
Delicious Seeds Northern Light Blue (Fem.)
Delicious Seeds Sugar Black Rose (Fem.)
Female Seeds X-Line White Widow x Big Bud (Fem.)

Beanz
 

Dominathan

Well-Known Member
I'd let mine get all the way to about 5 feet. Then again, I'd use at least 6 supplemental cfl bulbs placed strategically near the middle of the plant. Just me though.
 

Beansly

RIU Bulldog
I'd let mine get all the way to about 5 feet. Then again, I'd use at least 6 supplemental cfl bulbs placed strategically near the middle of the plant. Just me though.
5ft, wow. How many plants do you grow? How many 400 watters? What's your average yield?
 
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