I haven’t been able to find bamboo rounds besides what’s available on the Mirai store. I just can’t bring myself to pay the $35 plus shipping. I used chopsticks for my quince repottings. They were okay, but on a larger tree it’s just not gonna work. Too little surface area on the chopstick means that all of that pressure makes the chopstick go through root ball.
Anyway, I thought about giving something like this a go. Has anyone tried using something like this? Other suggestions?