Well you need to be really dedicated to get 4 lbs per plant and need to be rabidly dedicated to get 7 lbs or more. First you need to live in the area that is considered to have the clearest air in CA. Then you need the entire summer of clear sunny skies with temps in the triple digits most days. Make holes that are 5 feet deep and 5 feet in diameter and use at least 10 bags of Fox Farms Ocean Forest per hole plus supplements (bat guano, worm castings, calcium, sulphur, coco fibre etc, etc). Start with clones vegging in September (you would have to start now to get close next fall) making each into large clone mothers. Put the plants out the last week of May after adjusting the lights so they don't just jump to budding. Water up to an average of 30 gallons per day and fertilizing daily for vegging during the veg then fertilizing for flowering daily during the flowering stage constantly checking the soil ph and making needed adjustments.

Then yes you can average 4 lbs per plant and one rabid caretaker has gotten 10 lbs of dried trimmed buds from one plant. He believes he will top that this year so I am just waiting.

When the plants first go into the sun in may they look like most of mine do at the end of the season! I can see them when I drive by on the way to a friends place. By the end of summer they look like a forest of huge christmas trees. He has licenses for the plants he grows and they seem to leave him be. So get thee to the hills and did just one just one 5 foot by 5 foot hole and you will be stunned at how large that really is. I dug a 3 by 3 hole and that took 3 guys a whole day.

Next year I will have enough water give this a try water wise. I will still be limited to about 3 by 3 holes for now since I am 58 and it takes me a long time to just dig a hole that deep. But eventually I hope to attain the use of a backhoe and can have the 5 by 5's. It will cost more that $100 for the soil and supplements for such a hole and maybe as much as $200 per hole or possibly more.