10 Best Rose Fertilizers 2025 in the United States

Neptune's Harvest offers two liquid fertilizer formulas beneficial for rose growers: a Fish & Seaweed Fertilizer with a 2-3-1 N-P-K ratio and a Rose & Flowering Formula with a 2-6-4 ratio. Both are organic, making them gentle on plants and soil while providing natural nutrients. The Fish & Seaweed option promotes strong flowers and lush foliage through a blend of fish protein and seaweed-based micronutrients, supporting overall plant health. The Rose & Flowering formula, with its higher phosphorus content, encourages more blooms and vibrant flowers, making it well suited for roses and other flowering plants.

The BioAdvanced All-In-One Rose and Flower Care Fertilizer is a liquid concentrate designed not only to nourish roses but also to protect them from common pests and diseases. This product combines fertilizing with insect and disease control, which is convenient for gardeners looking to simplify rose care. It contains synthetic active ingredients like Imidacloprid and Tebuconazole, offering effective protection against pests such as aphids and Japanese beetles, and diseases including Black Spot and Powdery Mildew.

The BioAdvanced All-In-One Rose and Flower Care is a well-rounded choice for those looking to enhance their rose plants' health with minimal effort. Priced for convenience, this granule-based fertilizing product also serves as an insect killer and fungicide, making it a three-in-one solution. It works by promoting strong roots and vibrant blooms thanks to its effective formulation. The fertilizer is synthetic, which ensures a quick uptake of nutrients by the plants but may not be suitable for those specifically seeking organic alternatives.