Any significant yield differences between a 3 and 5 gallon container?

Obviously bigger root system = bigger yield..Just curious if using say a 3 - 3.5 gallon container compared to a 5 gallon bucket would have any significant yield differences.

Has anyone actually ever compared two clones 1 in a 3 and 1 in a 5 and found any differences in yield?

Put them in the 3 and you still have the option of transplanting again to 5. Not a big deal. Your question really depends on a lot of factors so I don't know how to answer it.

i went from 3 to 5 back to 3. its easier for me to move around 3g pots and lift them to tell when to water than 5g pots. if you are going to veg like over 6 weeks i would use 5g pots.

I've gone back and fourth with 3s and 5s. I haven't seen a difference in total yield in my grow. Think about it in terms of Weight/Area. Example being I grow in 2- 4'x8' grow trays with 2- 1000W HPS over both trays. Harvest is a push pull, so I only harvest 1 tray at a time. If I completely fill the trays with either 3s or 5s I still only fill an area of 32 sq ft. I get 3 pounds in 32 sq ft. per harvest using 20 3s. Since my grow is a medical grow currently with the patients I have I can have up to 18 plants in 4- 4x8 trays (2 in veg and 2 in flower) 72 plants total there is no reason for me to grow for any longer than 2 months. If you need to stay DL and only trying to grow a few plants then you would benefit from using lager pots and veg bigger plants and harvest more per plant. Also I should add cannabis plants like to grow their roots more latterly than horizontally. So deeper pots are better than wider ones.

It basically just depends on how big your plants get (which wrectly affect yield). l have 4 white lavender clones in flower right now (like 5 days in flower) in 7 gallon smart pots.

Let me start from the beginning it'll be easier to explain. I took the clones and planted them in four 1 gallon smart pots. I let them veg for a month, then transplanted 2 of them to the 7 gallons (bc I only had enough soil for 2). Two weeks later (@ 6 weeks) I transplanted the other 2 into 7 gallons, and could already tell a size difference. Two weeks later (8 weeks veg) I put them in flower and the 2 I had transplanted were literally like twice the size. Granted, the smaller ones shop up pretty quick in the beginning of flower, and are almost as tall but just don't have as much mass, as many branches, etc.

So basically, yes a smaller pot can stunt your growth if a plant's root mass gets big enough. But, if you're only vegging for like 4 weeks then it won't matter as much a especially if you use a smart pot. They can hold bigger plants than regular plastic pots.

Ok good to know, I guess it would have been good to mention I only plan on vegging 3 - 4 weeks max.

Yeah, if you go with smart pots (I HIGHLY recommend for soil grows, the root mass they help form is just perfect and amazing lol) then 3 gallons would definitely be enough. And honestly, vegging at 4 weeks you would probably be fine with 3 gallons anyways, especially if its your first grow and you might experience some slower growth.