I have a concrete(stone) vertical wall? I want to put picture on it using plants.
I have several limitations:
- I can not place external blocks to let plants growth on it.
- Initially picture should not be visible, so picture would grow out from the stone.
- I am not a scientist and have no access to industrial materials, so want to make it out with everyday materials.
- I want to put plants for 1-2 times, and do not come to them while they are growing
- Time is limited, I am living in norht hemisphere in the temperate zone, so soon automn is coming, so I have only 2 weeks to let plants growth.
The wall itself have properties:
- It looks on the south, so sun lights on it almost full day
- Overall direction is vertical, while it is not fully staright, it has relief
- There is little overhand above the all, so it would not get heavy water stream in case of staight rain
So I have several options:
- Mold or unicellular fungi. Idea was to put liquid with mold and nutrients on the wall. But as I know mold does not like sun places, but likes wet environment
- Grass. Here idea was to put seeds into nutrient soil and put it into small holes into concrete. But as I see these holes is 1-3mm wide , and it might be too small to grow the grass.
- Colored bacterias. It was similar to first option. But I do not know any possible everyday materials for this. And the sun again would bother them.
So I would be glad to here your other options, or workarounds to my ones.