Seedling pot made from an empty toilet paper roll. After germination, it can be buried directly in the garden bed as is; the roots will grow through the softened cardboard, and soil organisms will then consume it. Make sure to only use toilet paper rolls made from unchlorinated and unprinted cardboard.
edit: please check if recycling has a problem with chemicals or heavy metals in your country
We almost did this (I still have some tubes stowed away), but we ended up mostly using soil blocks mainly because I forget to harvest the tubes throughout the year.
What I like about the tubes idea is that they are about twice as tall as soil blocks or commercial fiber pots/trays (which are also tapered) of the same size. That’s a lot more room for the roots to grow before they explode out the bottom, especially for vegetables that want to start with a long first root.
Heck I’ve convinced myself. I need to start my beans inside this year because of the darn squirrels, so maybe I’ll do it with these tubes and then get rid of the rest of my leftover fiber strips with flowers.
ha, i also use them for beans :D