DIY Soil Mix Ratio Calculator
Create the perfect custom soil blend for your plants by calculating exact ratios of components based on your gardening needs.
Recommended Components for Your Mix
Premium Organic Compost Blend
Perfect for adding nutrients and microbial life to your custom soil mixes. OMRI listed for organic gardening.
Get Espoma CompostProfessional Aeration Additive
Lightweight perlite and vermiculite blend to improve drainage and oxygen in your soil mixtures.
View Hoffman PerliteFrequently Asked Questions
Custom mixes allow you to tailor the soil to your specific plants, local conditions, and gardening style. You control the quality of ingredients, can adjust as needed, and often save money compared to premium pre-mixed soils.
Yes, with some considerations. For example, coconut coir can substitute for peat moss, or pumice for perlite. Maintain similar texture and function when substituting. Always sterilize homemade compost before use.
Properly stored in a cool, dry place, most mixes last 6-12 months. Nutrient content diminishes over time, so refresh mixes annually. For seed starting, always use fresh mix each season to prevent disease.