Comparison: Best Schultz Liquid Fertilizer (Updated | Nov 11th)

Look at the N-P-K ratio to match the nutrient needs of your plants, the recommended dosage, and the container size for your watering frequency. Also check if the formula is specialized, such as Cactus Plus (2-7-7) for succulents or African Violet Plus (8-14-9) for blooming houseplants. Finally, compare price per ounce to gauge overall value.

The All Purpose 10-15-10 provides a balanced blend of nitrogen, phosphorus, and potassium suitable for a wide range of vegetables, flowers, and shrubs, while the Cactus Plus 2-7-7 is lower in nitrogen and higher in phosphorus and potassium, which benefits drought‑tolerant plants. Use the All Purpose for general garden beds and the Cactus Plus for succulents, cacti, and other water‑wise plants. Both are applied at 7 drops per quart of water, but the specific nutrient ratios differ.

Smaller 4‑ounce packs are convenient for indoor gardeners or those trying a new formula without committing to a larger quantity, while the 8‑ounce bottles offer a lower cost per ounce for frequent users. If you have many plants or a large garden, the larger size reduces packaging waste and refilling effort. Consider how often you fertilize and the shelf life of the product when deciding.

African Violet Plus has a higher phosphorus and potassium ratio (8-14-9) that encourages vibrant blooms and strong stems, specifically formulated for delicate flowering houseplants. The All Purpose 10-15-10 provides more nitrogen, which promotes foliage growth but may not enhance flower production as much. Choose African Violet Plus for ornamental indoor plants that you want to keep in bloom.

Several Schultz products, such as the All Purpose 10-15-10 and Cactus Plus, list the United States as the country of origin, indicating they are manufactured domestically under USDA guidelines. While origin alone doesn’t guarantee superiority, U.S. production often ensures consistent formulation and quality control. If sourcing locally is important to you, check each item’s details before purchasing.

Multi‑packs, like the 2‑pack of 4‑ounce All Purpose or the 2‑pack of Cactus Plus, typically lower the price per ounce compared to buying single bottles. Calculate the total cost divided by the combined fluid ounces to see which offers the cheapest nutrient delivery. Also factor in your plant types; buying a multi‑pack of a specialized formula only makes sense if you have many of those specific plants.

Yes, many Schultz formulas, such as the All Purpose 10-15-10 and African Violet Plus, are labeled for both indoor and outdoor use, making them versatile for a mixed plant collection. However, specialized blends like Cactus Plus are optimized for succulents and may not provide the nitrogen levels needed for leafy outdoor vegetables. Match the formula to the primary plant type to achieve optimal growth.