Comparison: Best Schultz All Purpose Liquid Plant Food (Updated | Nov 11th)

The 8‑oz bottle (ASIN B018H2BBX2) provides more feed for larger gardens or multiple plant types, reducing the number of refills needed. The 4‑oz options (ASIN B018LSGTLG and others) are ideal for casual gardeners, indoor growers, or those who want to try the formula before committing to a larger size. Consider how many plants you have and how frequently you water to decide which volume offers the best balance of convenience and cost.

Yes, the 2‑pack listings (ASIN B01EBEZLWM, B07VGK6Y3J, B07QK7FL4M) typically lower the per‑ounce price because you receive double the product for a single purchase. They also include two droppers, making it easier to keep one in the garage and another in the house. If you have both indoor and outdoor plants, the dual packs provide extra value and reduce the need for separate trips to restock.

Absolutely. All of the listed Schultz products are marketed as “all purpose” and work on flowers, tomatoes, roses, vegetables, fruits, trees, shrubs, annuals, perennials, and houseplants. The balanced NPK ratio supports healthy root development and foliage in a wide range of environments. Just follow the recommended 7‑drop dosage per watering to avoid over‑feeding.

The numbers represent the percentages of nitrogen (N), phosphorus (P), and potassium (K) – the three primary nutrients plants need. A 10‑15‑10 blend provides a slightly higher phosphorus level, which encourages strong root growth and blooming, while still delivering ample nitrogen for leaf development and potassium for overall vigor. This balanced ratio makes it suitable for both vegetative growth and fruiting stages.

Schultz includes an easy‑to‑measure dropper that delivers exactly seven drops per use, which the company has calibrated for the 10‑15‑10 formula. Using the dropper ensures each plant receives the correct nutrient concentration, preventing both under‑ and over‑application. For best results, attach the dropper to the watering can and add the drops directly to the water before you water the plant.

Cactus Plus (ASIN B018H2ZH5A) has a lower nitrogen and higher potassium ratio, which is better suited for slow‑growing succulents and cacti that prefer less foliage growth and more root development. While the All Purpose 10‑15‑10 works for most plants, using the specialized 2‑7‑7 formula can prevent leggy growth in desert‑type plants. Pairing the Cactus Plus with the All Purpose product in a kit (ASIN B01DJSDW5E) gives you flexibility for a mixed garden.

All listed Schultz liquids are made in the United States, which often indicates adherence to strict manufacturing standards and consistent quality. The package weight (e.g., 14.6 oz for the 8‑oz bottle) helps you gauge how much space the product will occupy and whether you need a sturdy shelf or cabinet. Storing the bottles in a cool, dry place away from direct sunlight prolongs shelf life and maintains nutrient potency.