It is amazing to see the perfect styrofoam box. And you may wonder, where do you obtain the box? Well, don't worry: the box demonstrates the dimensional data for a clear understanding; you can obtain similar results with a sack or a drain channel. This creator shows you concepts that you can apply under a wide variety of agri- and horti-cultural situations. The perfectly shaped box isn't the point; the demonstration is meant to show you how to treat the plant.
I sprinkle used coffee grounds around all my outdoor potted plants and garden. Ants run away! No harm to any living creature. I do not know why it works ... I just know that it does work wonderfully.