When I started out I was such a grow noob I looked at the instructions the company had an example for doing cilantro in rockwool and had placed multiple seeds in one piece of rockwool. At the time I thought this was ingenius and would be able to fit tons more plants and later realized I made a grow noob mistake and wasted a bunch of seeds cuz not all the plants could fit under the light and some outgrew others. How much do I expect to yield of the 6 cup kit? Do you mean when its full? I have no idea really on an expectation of yield on my 3 existing plants as of now. I am hoping for a couple ounces hopefully off the forbidden fruint and even more since I have 2 plants of the mystery. Right now I do have 2 plants growing out of one single cube which are the mystery weed plants and both have grown almost conistently the same and have been near the same size the entire time. The problem with this is that they both being next to eachother in the same cube take up eachothers light, I had to train them both with mini-bungee cords to get them into their own light. The only advantage of me putting extra seeds in was a process of elimination where I was able to cut out all the slow growers and keep all my strongest growing genetics as the main plants in the cubes. By the end of the first month I had cut the plants down to one in each cube except the mystery weed that I kept two in because they were both so big. If you are thinking about getting a stealth hydro kit like this you need to space out your pods a bit more for the plants, you should really make it yourself. You should start your first grow with a couple plants, its hard to concentrate on a ton your first time, its much easier to be able to tame 3-4 plants. If you want maximum yield its all about genetics in my opinion, find the best kind of strain for your grow area, and your own tastes and you'll be set!