10 Best Rose Fertilizers 2025 in the United States

BioAdvanced All-In-One Rose and Flower Care is a convenient granule fertilizer designed to support healthy rose plants by promoting strong roots and vibrant blooms. This product doubles as a multi-purpose treatment by combining fertilizer with pest and disease control, making it ideal for those seeking an all-in-one solution without buying multiple products. It contains synthetic active ingredients like Imidacloprid and Tebuconazole that target common rose pests such as Japanese Beetles and Aphids, as well as fungal issues like Black Spot and Powdery Mildew.

The systemic and rainproof formula lasts up to six weeks, reducing the need for frequent applications. However, if you prefer purely organic fertilizers or want precise control over nutrient ratios, this might not be the best fit. Additionally, the product is restricted in several states, so availability could be limited depending on your location.

This product is well suited for gardeners seeking a straightforward, combined fertilizer and pest/disease treatment, especially if managing pest problems alongside feeding roses is a priority.

Jobe's Organics Granular Rose Fertilizer is a well-regarded option for gardeners looking for an organic solution to nourish their roses and other flowering shrubs. With a 3-4-3 NPK ratio, it provides a balanced supply of nitrogen, phosphorus, and potassium, which are essential for vibrant blooms and healthy foliage. Being an organic fertilizer, it is free from synthetic chemicals, making it a safer choice for the environment and for gardeners who prefer natural products.

The OMRI listing confirms its suitability for organic gardening. One of its standout features is the simplicity of application, recommending use every 6 weeks during the blooming season, which aligns well with the care schedules of most flowering plants. However, the absence of specific mentions of micronutrients such as iron or magnesium might be a drawback for those looking for a more comprehensive nutrient profile.

The granular form helps in easy measurement and reduces the risk of over-fertilizing. While the product is designed to minimize waste and mess, some users might still find granular fertilizers slightly more cumbersome to apply compared to liquid formulations. The 4-pound bag size is practical for most home gardens, but larger gardens may require multiple bags. Jobe's Organics Granular Rose Fertilizer offers a reliable and eco-friendly option for those looking to boost the health and beauty of their flowering shrubs with a straightforward application regimen.

The Osmocote Smart-Release Plant Food Plus is a slow-release granular fertilizer that supplies 11 essential nutrients to plants, including roses, for up to six months. Osmocote’s formula is designed to meet the general nutritional needs of a wide range of plants, making it a versatile choice if you grow roses alongside other plants. Its key strength lies in the smart-release coating, which delivers nutrients gradually, reducing the risk of overfeeding or burning your plants—a common concern with synthetic fertilizers. This feature means you only need to apply it once every six months, which is convenient and less labor-intensive.

It is a synthetic fertilizer rather than organic, so if you prefer natural gardening methods, this might not be the perfect fit. However, it does include micronutrients, which are beneficial for healthy rose growth and vibrant blooms. One container covers about 75 square feet, making it suitable for small to medium rose gardens. Because it is a general-purpose fertilizer, it may not provide the precise nutrient balance that some rose specialists recommend, especially if your roses have specific needs like higher phosphorus for better flowering. Also, its synthetic nature means it won’t improve soil biology like organic options would.

For rose gardeners seeking an easy-to-use, long-lasting fertilizer with balanced nutrients and minimal risk of damage, Osmocote Smart-Release offers a solid and reliable option.