Comparison: Best Costco Miracle Gro Organic (Updated | Nov 11th)

Look at where you’ll be planting: potting mixes are formulated for indoor containers and seed starting, while container mixes are designed for both indoor and outdoor pots and larger containers. Check the ingredient list; mixes with peat moss and coir are great for moisture control, whereas mixes with aged compost provide longer‑term nutrition. Also compare the bag size to your planting volume to avoid waste.

An OMRI (Organic Materials Review Institute) listing confirms that the product meets strict organic standards, meaning it contains only approved natural ingredients. This gives confidence that the soil or fertilizer won’t introduce synthetic chemicals into your garden, which is especially important for organic gardening and for growers who sell produce as organic. It also often means the product is safer for indoor use around pets and children.

Liquid plant food, like the 32 oz Miracle‑Gro Organic Plant Food, is diluted and applied directly to the soil, delivering nutrients quickly for fast visible results. Granular formulas, such as the All‑Purpose Plant Food granules, release nutrients more slowly over several weeks, reducing the frequency of applications. Choose liquid if you prefer a fast boost and easy mixing, or granules if you want a longer‑lasting feeding schedule with less frequent re‑application.

For extensive garden beds, the Miracle‑Gro Organic All‑Purpose Plant Food granules (two 3 lb bags) provide up to three months of feeding and cover a broad range of plant types, making it cost‑effective per square foot. The Performance Organics Edibles Plant Nutrition granules also cover a large area (up to 265 sq ft) and are tailored for vegetables and fruits, which can be a good choice if you focus on edibles. Compare the price per pound and the coverage area to determine the most economical option for your space.

Liquid feeds should be diluted and applied every 7–14 days, depending on plant type and growth stage. Granular feeds are typically reapplied every 4–6 weeks, as they release nutrients slowly over time. Always follow the label directions for your specific product and adjust frequency based on observed plant health and soil moisture.

Yes, many of the mixes are versatile. The Performance Organics All‑Purpose Container Mix and the Organic Indoor Potting Mix work well in indoor containers, while the same All‑Purpose mix is also labeled for outdoor pots and garden beds. The Indoor Potting Mix includes peat moss and coir to help prevent over‑watering, making it especially forgiving for indoor environments.

All‑Purpose granules are a balanced formula for a wide range of plants, including vegetables, herbs, and flowers. Blooms granules are enriched with nutrients that promote flower production and color intensity, ideal for ornamental beds. Edibles granules focus on nutrients that support fruit and vegetable development, such as tomatoes and peppers, and are OMRI‑listed for organic fruit production.

Buying in bundles generally lowers the per‑unit cost; for example, two 32 oz liquid plant‑food containers cost less per ounce than a single bottle. Similarly, the two‑bag 3 lb granular bundles spread the price over more applications, reducing the cost per feeding cycle. When budgeting, calculate the total amount of product needed for your garden and compare the price per pound or per ounce across bundle options.