Repot from 15g to 45 g?

I have an large outdoor plant in a 15 gallon smartpot. Seems as if the 15 gallon plants require watering everyday whereas the 45 gallon pots can wait a bit longer. Also, plant very large and it appears to be choking in the 15 gallon. Since I just culled garden of males I have available 45 gallon pots. My question is can I safely cut the sides of the 15 gallon and swipe a machete under the bottom to remove stuck roots going through bottom of pot and repot it into a 45 gallon? Not in flower yet , just starting to show a white pistol so still in veg but not for long.

Found this on another forum: Quote:
I wouldn’t transplant them at this point due to the fact that you should avoid shocking them. Instead, you could always just double pot them. The roots will grow through the bottom holes of your smaller pots and continue growth into the bottom/larger pots. END Quote

However, most people state NOT to repot because of stress. Looking at this big plant in small 15 gallon it appears to be needing bigger pot. Since it is in a fabric smartpot can I repot into bigger double potting with fabric pot? Seems logical answer is no.
Anyone want to advise on this?

Why not just cut the 15g smart pot off after you place it in the 45 ?

or just put that plant strait in the ground,the biger your pot is the bigger the plant will get and a small pot you will need to water it 2 times a day when its budding.

I had a plant in a 3 and a half gallon pot and was trying to give it a home and no one needed one, so I grew it out and watered it 3-4 times a day.i just brought it home and I got 3 and a half pounds of buds off it.it was a bigworm seed and it was purple the prettyest plant I ever grew,black cherry do jo.every one I tried to give it to got mad at there sealf for not taking that plant after they sean it on chop day.i have grew thousands of plants bigger but it was the pretest plant I ever sean to this day.

If you’re good at transplanting then your plant won’t get shocked to bad.

Even if she does get shocked, the extra growth you will receive in the 45g pot will be well worth it in my opinion!!

Put the 15g smart pot in the bigger pot without cutting it or removing it. Roots will grow through the fabric just fine. I up pot from 1g smart pots to 15g then to 55g or 200g all with the previous fabric pots intact inside. Sure it's a pain to clean the roots off if you intend to reuse them, but better than cutting the pot to pieces and stressing the plant. The only reason the roots don't grow out the sides of the fabric pot is the air, they will start to grow out of any part of the pot that is buried.

Dudogrow said:

Put the 15g smart pot in the bigger pot without cutting it or removing it. Roots will grow through the fabric just fine. I up pot from 1g smart pots to 15g then to 55g or 200g all with the previous fabric pots intact inside. Sure it's a pain to clean the roots off if you intend to reuse them, but better than cutting the pot to pieces and stressing the plant. The only reason the roots don't grow out the sides of the fabric pot is the air, they will start to grow out of any part of the pot that is buried.

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How would carefully cutting the pot down the sides stress the plant? Nobody said use a chainsaw. But hey, to each his own.

I also vote put the 15gal smart pot into the 45 gallon pot. The Roots will go through! I have a buddy here on the Oregon coast who grows CBD pro. & he's had plants in 100gal pots grow through the bottom to the ground. If that's where the moisture and nutrients are that's where that roots will go. If you're worried about it you can always carefully cut a few small slits in the bottom of your 15gal smart pot to make it easier for the roots to find their way to the 45 gallon pot below. Lots of luck!

FresnoFarmer said:

How would carefully cutting the pot down the sides stress the plant? Nobody said use a chainsaw. But hey, to each his own.

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The roots grow right to the edge of the fabric and don't wrap around so there's a chance part of the root ball may be damaged when outside the fabric pot. I understand if your careful cutting it off is an option, but I see it as a waste of time and an unnecessary risk when you can just put it in the new pot as is.

If the goal is to get the roots going fast, why hinder them? I'd think the plants wasted energy on fighting the fabric would be better spent on the stems and leaves.

Fast-forward, I cut sides of fabric 15 gallon pot, removed pot entirely, and placed in a 45 or 65 gallon (don't remember which) and it did not affect the growth at all. She was the largest, tallest of that strain. A few weeks ago , toward end of September, we had an unexpected high wind and rain event here in Norcal and 7 of my girls snapped clean in half requiring me to remove and hang. Lesson learned that I must provide a strong support system so I am chalking it up to my fault. The few that I used 6 ft tall square tomato cages were unaffected. The square cages can be secured to each other to make as wide as you need them. Growing from seed is my preferred method as they have a tap root and grow bigger if started early than any clone I've ever grow. Now that this outdoor season is coming to a close it is time to start preparing to build a hoop house because Mother nature can destroy in 5 minutes what it took 6,7 months to grow. Extreme wind is your enemy. The rain not so much but if buds are heavy, weighing down the branch, the added weight from water can cause them to snap. Needless to say, I've spent every waking minute since that event tying up branches to main stem as a late defense move.