Planning your own potting mix starts with the plants you intend to grow and the containers you’ll use. Different plants need different balances of moisture retention, drainage, and aeration, so choose a recipe suited to your planting goals rather than assuming one mixture works for everything.
Review the ingredients and proportions in your chosen recipe before mixing. Consider the growing conditions, container drainage, and care needs of your plants, and follow handling instructions on ingredient packaging. Prepare a manageable batch so you can combine the materials thoroughly before filling your containers.