This style of op is known as 'Sea of Green' or SoG.

You can build this grow op in any scale you like, from a single mother and just 1 plant put in to the flowering area every two weeks up to as big as you require.

The idea is to grow only the top cola of a naturally growing plant with none of the lower branches and the small budz those branches produce. All branching, everything on the lower 1/3 of the plant, is snipped off in about week 2 and 3.

Plant at 6 wks flowering, note lower branching is removed

The method of putting clones in to flower with no veg time keeps plants relatively short, to about 38-42″ (1 yard), which better suits artificial lighting.

Even powerful HPS lighting can only penetrate foliage a few inches, so a yard tall is just about right. I find that big lights give better bud density, so I use two 1000W HPS, one over each pair of 4' x 4' flood trays.

The mothers are maintained under 24 hour 400W HPS. The clonebox has 6 x 18W fluorescent tubes (24″), usually on 24/7 but shut off for the first 6-8 hours after a new batch of cuttings.

Clones go straight from the clonebox into the flowering trays with no vegging required. They grow a little bit vegetatively for the first 3-4 weeks but then stop getting taller and start making good bud weight after then.

I keep about 8-10 mothers and do about 30 cuttings every 2 weeks from them. I choose the best 20-23 clones to be put in the 4-tray flowering area.

Leftover clones become replacement mothers or are discarded. Mothers are replaced one by one, about every 4-8 weeks as needed.

As each batch of clones goes in to tray #1, a batch comes out of tray #4 to be harvested, every 2 weeks.

The mother vegging area is in the same room with the flowering plants, but has a lightproof curtain to prevent interrupting the flowering plants' light cycle and has its own ventilation system as well. Each tray in both the vegging & flower areas has its own pump, reservoir tank and timer, allowing the watering rate and nutrient mix to be tailored to the plant for vegging as well as during each 2 week phase of flowering.