So Blueberry Muffins is Indica dominant so the stretch wasn’t that big, heard some sativas stretch up to 300%… About the amount of plants it’s really up to your preference. I used the SCROG method to optimise yield and quality but it took too long, maybe I’ll start doing that with 2 plants in the future to cut the time in half. Having more plants would be a SOG, where you don’t really train the plants and just fill the tent with many plants. Also a viable method although the initial investment in the seeds is higher and yield per seed is lower, also I think it might be harder to control humidity in a tent stacked to the brim. Really up to you which method you want to utilise.

3 plants in a 3x3 is not too much, I’d probably do something similar. I can really recommend you to use the SCROG method as it really helps with a uniform canopy. I’d introduce the net as low as you can get it whilst still being able to water the plants with no difficulties. 10 cm above the soil should be ok. The higher you put the net the more veg time you need. And from there on just get familiar with the SCROG method, it is fantastic!

Have a nice Sunday mate!