Yield Estimate?

This is my first time growing and as the days have gone by, my curiosity to know how much I could possibly get from this harvest has grown. I just started flowering, 2 1/2 weeks in to be exact, and the buds have started forming. I have a total of 7 plants, 3 Northern Lights in 1.5 gallon pots, 3 Vanilla Kush & 1 Pineapple Express (VK & PE in a 18 gallon DWC tote tub.) All of the Northern Lights are about 2 feet tall (give or take a few inches), Vanilla Kushes about a foot tall each (started these later than the Northern Lights) and the Pineapple Express at 20 inches. I feed the NL's every 2 waterings with FloraDuo, and for the plants in the DWC container replace nutes+water every 1 1/2 weeks at a PPM of 800. All of these plants are under a 600 watt HPS lamp along with some extra supplemental lighting at the sides from a T5 light strip. Grow room temperature is always in between 70-80 degrees Fahrenheit.

Pictures below!

I grow 6 plants per 600 watt light....... and generally get 1.5-2 oz. per plant, depending on the strain.

SSHZ said:

I grow 6 plants per 600 watt light....... and generally get 1.5-2 oz. per plant, depending on the strain.

Click to expand...

At what height do you usually start flowering them to get 1.5-2 oz? And also, how long do you flower for?

depends alot on the strain

I primarily want an estimate on the Northern Lights. I started flowering them when the smallest hit 12 inches, the remaining 2 were 14-15 inches. Ever since I started flowering (approximately 2 weeks ago) the smallest plant grew up to 22 inches and the other 2 about 25ish inches. Do you guys have an estimate of how much yield I can get from each of these girls?

Anyone else want to take a guess?