If you love gardening, the cardboard toilet paper roll will also be useful in this area. If  spread on the ground  , watering will allow water to be retained for longer and the soil to be hydrated for longer. Plants that require the soil to always be well hydrated will grow better and faster. Furthermore,  since the cardboard roll is biodegradable  , you will not have to worry about removing it since it will have dissolved within approximately one year.

Finally, for plants  you can also use the roll of planting paper  . It will be enough to make four vertical cuts of the same length. To be as precise as possible, you can take a roll of masking tape that you will use on a surface as a base, place a marker on top of it, and bring the roll of paper closer to it. In this way, with the fixed marker, turning the cardboard you will have a precise mark around the entire circumference, useful for delimiting the depth of the cuts.

Once you have made the 4 cuts, fold the four tabs that have been created over themselves, as if to close the roll. Then fill with soil and seeds and water,  the seeds will germinate very quickly  and, thanks to the composition of the cardboard roll, you will be able to plant the roll itself directly, thus avoiding transplanting the newly born seedlings.