Comparison: Best Schultz All Purpose 10 15 10 (Updated | Nov 11th)

The 8‑oz bottles (ASIN B018H2BBX2 and B08LVFTD45) provide double the volume of the 4‑oz options, which is useful for larger gardens or frequent watering. The 4‑oz containers are often sold in multi‑packs, making them convenient for indoor growers or those who want to try the product without committing to a larger size. Both sizes share the same 10‑15‑10 N‑P‑K ratio and are formulated for a wide range of plants.

Multi‑packs, such as the 2‑pack (ASIN B01EBEZLWM) or 3‑pack (ASIN B06ZYYN6LD), usually offer a better price per ounce compared to buying single bottles. They also ensure you have enough product on hand for ongoing feeding schedules, especially during transplanting or repotting periods. The dropper included with each bottle makes measuring consistent across all packs.

All of the listed Schultz All Purpose formulas are labeled for both indoor and outdoor use, so they can be applied to houseplants, garden beds, shrubs, and trees alike. For indoor growers who prefer smaller containers, the 4‑oz bottles with easy‑measure droppers are ideal. Outdoor gardeners with larger planting areas may find the 8‑oz size more economical and reduce the number of bottles they need to store.

The 10‑15‑10 ratio indicates the percentages of nitrogen (N), phosphorus (P), and potassium (K), which supports balanced growth, root development, and flowering. Verify that the product mentions “All Purpose” and includes a dropper for precise dosing. All the listed ASINs share this ratio, so the primary distinction is packaging size and quantity.

Generally, the larger 8‑oz bottles have a lower cost per ounce, making them a better value for long‑term or high‑volume users. However, if you have limited storage space or only need a small amount for occasional use, the 4‑oz multi‑packs can be more convenient and reduce waste. Compare the unit price (price ÷ ounces) to decide which option fits your budget and usage pattern.

Some listings, like the 2‑pack (ASIN B01EBEZLWM) and the 2‑pack with a special dropper (ASIN B07QK7FL4M), emphasize the easy‑measure dropper and the suitability for transplanting and rooting. The 1.5‑lb bulk bag (ASIN B018F5X0T4) offers the most product for large gardens but requires a larger storage area. Otherwise, the core formula and performance are consistent across all SKUs.

The recommended application is typically 7 drops per gallon of water, applied each time you water the plant. For newly transplanted or repotted plants, you can use the same dosage to encourage root development. Consistent weekly feeding during the growing season will help maintain healthy foliage and flowering.