DIY Potting Mix Recipes for Healthy Container Plants

How to Make the Right Potting Mix for Container Plants

Container plants need light, well-draining mix—garden soil is too dense and may harbor pests. A good mix holds moisture but has air pockets for roots. The University of Illinois recipe:

• 1 bushel shredded sphagnum peat moss
• 1 bushel vermiculite
• 1¼ cups ground limestone
• ½ cup phosphate fertilizer (0-20-0) or ¼ cup (0-45-0)
• 1 cup slow-release granular fertilizer (5-10-5)
• Yields 2 bushels

Adjust for special needs: more peat for acid-loving blueberries; extra drainage for succulents and orchids.

Choose containers with drainage holes. Fill bottom ⅓-¼ with empty plastic milk jugs (saves mix, improves drainage). Add mix, leave 1" from rim, plant, water thoroughly. Don't tamp—water should drain in 10 seconds. Fertilize weekly, water regularly, provide sun.