Comparison: Best Menards Organic Potting Soil (Updated | Nov 11th)

Focus on a blend that offers good moisture retention, balanced pH, and added beneficial microbes like mycorrhizae. Look for peat‑free options if you want a lower carbon footprint, and check that the mix is pet‑safe and free of synthetic fertilizers. A product with added nutrients such as kelp or worm castings can give your houseplants a growth boost.

Back to the Roots uses a peat‑free formula with yucca extract for moisture control and dolomitic limestone for pH balance, while Miracle‑Gro relies on responsibly sourced peat, coir, and a quick‑release natural fertilizer. The Back to the Roots mix also includes mycorrhizal fungi for root development, whereas Miracle‑Gro emphasizes fertilizer longevity. Both are suitable for indoor containers, but Back to the Roots may appeal more to eco‑conscious gardeners.

Compressed soils expand up to four times their size, making them lightweight and space‑saving, which can be cost‑effective for large projects. They often contain a full suite of nutrients and trace minerals, but you’ll need to add water and sometimes blend with other media for optimal drainage. If you have limited storage space, the expanded volume can provide good value, especially for container gardening.

Both Miracle‑Gro Organic Outdoor Mixes (the 16‑qt and 25‑qt bags) contain a quick‑release natural fertilizer that feeds plants for up to two months. The larger 25‑qt bag can fill three 10‑inch containers, giving you more coverage per purchase. If you need extended feeding without frequent re‑application, Miracle‑Gro’s outdoor mix is a solid choice.

Peat‑based mixes typically combine peat with perlite or sand to improve drainage while retaining moisture, which works well for many garden applications. Peat‑free blends, such as those using coco coir, can offer similar drainage but often have a lighter weight and lower carbon impact. Choose based on your priority: traditional peat for proven performance or peat‑free for sustainability.

Look for mixes that include mycorrhizal fungi, kelp, and beneficial microbes to enhance root health and nutrient uptake. A blend that combines compost, biochar, and worm castings can improve soil structure and water retention without overwatering. These added ingredients often justify a higher price by delivering stronger, healthier growth.

Calculate the volume of your containers; most 12‑inch pots require about 1 qt of soil, while larger 10‑inch outdoor containers need roughly 2‑3 qt each. For small indoor projects, a 12‑qt bag like Back to the Roots is convenient, whereas larger outdoor beds benefit from 16‑qt or 25‑qt bags such as Miracle‑Gro. Buying a larger bag can lower the per‑quart cost, but ensure you have storage space for the extra volume.