How to make your own houseplant potting mix To make your own basic potting soil for indoor plants, Kiersten recommends combining one-third coco coir to retain moisture, one-third perlite or ...

What is Potting Soil? Potting soil, despite its name, doesn’t always contain soil. Instead, it often includes a blend of organic materials such as peat moss, compost, and sand.

Use a vegetable potting mix to sow seeds. Don't use garden soil for your indoor plants because it won't drain well in a container. Plus it may contain pests, plant diseases, and weed seeds.