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

Look at the volume you need for your garden or indoor plants; the 8 oz bottle (SPF45170) is great for larger outdoor beds, while the 4 oz options are convenient for occasional indoor use. Also compare the price per ounce to gauge value, as larger containers usually offer a lower cost per ounce. Finally, check the packaging weight and dimensions if you have limited storage space.

The 10‑15‑10 blend provides a balanced nutrient mix ideal for a wide range of flowers, vegetables, and houseplants, promoting steady growth and blooming. The 20‑20‑20 formula (SPF70690) is a higher‑strength fertilizer designed for heavy‑feeding situations, such as fast‑growing vegetables or nutrient‑depleted soils. Choose the lower NPK ratio for general maintenance and the higher ratio when plants need a rapid boost.

Purchasing the 2‑pack gives you a backup supply, ensuring you won’t run out mid‑season, and it often saves a few dollars per ounce compared to buying two singles. The dropper applicator is included in each bottle, making it easy to measure the recommended 7 drops per watering. This option is especially handy for gardeners who treat both indoor and outdoor plants regularly.

Yes, all the listed Schultz liquid formulas are labeled as suitable for indoor and outdoor use, covering flowers, tomatoes, roses, shrubs, and houseplants. The easy‑dropper design lets you apply the correct dosage without over‑fertilizing, which is important for sensitive indoor foliage. Just follow the recommended mixing rate—typically 7 drops per gallon of water.

The slow‑release granules feed plants for up to three months, reducing the need for frequent applications and minimizing the risk of nutrient burn. It contains micronutrients and an exclusive delivery system that gradually supplies nitrogen, phosphorus, and potassium. This option is cost‑effective for larger garden beds where regular liquid feeding would be cumbersome.

Cactus Plus provides a lower nitrogen blend tailored for succulents and cacti, preventing over‑growth while encouraging healthy root development. Pairing it with the All Purpose 10‑15‑10 allows you to address the specific needs of both desert‑type plants and more nutrient‑hungry foliage in the same garden. The kit includes two droppers, making it simple to switch between formulas.

All the products listed indicate they are manufactured in the United States, which typically ensures consistent quality control and adherence to EPA regulations. The formulations are the same across sizes, so you won’t lose nutrient potency when buying a smaller bottle. However, always verify the expiration date to ensure the fertilizer’s effectiveness.

The dropper allows precise dosing—usually 7 drops per watering—so you avoid over‑application, which can damage roots. It also simplifies the mixing process, especially for beginners who might be unsure about measuring liquid fertilizer. This feature adds convenience and helps you get the most out of each bottle, enhancing overall plant health.