How can I best plant potted plants? Since both the houseplant and its standard pot fit in the flowerpot, you don't need extra soil. How convenient! Do I have to make holes in the pots? Our outdoor pots already have holes. Our indoor pots do not have pre-drilled holes. You can place the plant, with its inner pot, directly into any of our indoor pots. Are all elho products made from recycled materials? We strive to use the most sustainable production methods possible. For this reason, we currently use 100% recycled plastic. We are looking for new solutions to manufacture products in an even more sustainable way and make your life greener. What exactly does elho recycle to make pots? The most important raw material is the plastic used by various companies, which is generated as unused waste from their production processes, as well as the Echo pots that come off the production line when the machines start up or during color changes.