Hello jheight2 from Malaysia, so nice to meet you. And
to ATP.
I love what you are doing in the classroom with the children. I hope you will keep us updated on the project your are doing.
Soon you will need to transplant each seedling to a large container, as they will need the room for their roots to grow. You can use any sort of recycled container for this purpose, like 2 or 3 gallon plastic containers? I would make sure they have holes in the bottom for the excess water to drain off.
