Hey dude :) I'm following your diary as im growing Blackberry too, and outdoor too :) You just started One week before me :)
I was wondering the same. I started on a 10L pot. And somebody commented my diary saying "Go for a 30L".
Well... I was wondering if i should transfert from my 10L to a 30L.. Was the stress risk worth it, you know...
And well, i found an article by the breeder (
@fastbuds) : https://2fast4buds.com/news/best-pot-size-for-autoflowering-seeds
They claim that 15L is the best. Even on their facebook. But a lot of people are commenting on their Facebook page, saying "15L ?! That's a joke", arguing 30L is the best.
Who believe ? The breeder, or cannabis grower !? I'm not sure... Verry frustrating :D It's like a religion battle :D
I kind of give more credit to the breeder... They made the genetic selection, so they basically grown hundreds of generations of this strain before selling the seeds. I believe they have the best experience about it.
But I may be wrong. I'm not sure we will have a 100% sure answer. We will have to find the answer by ourselve...
The sure thing is that you can't go wrong with a 15L pot in my opinion.