10 Best Rose Fertilizers 2025 in the United States

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.

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 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 product is rainproof for up to six weeks, meaning you don't have to reapply frequently, which is helpful for busy gardeners. Application is straightforward—mix the concentrate with water and pour it at the base of your roses, avoiding leaf contact to prevent damage. If you prefer organic fertilizers, this product would not fit since it's synthetic.

This fertilizer is well-suited for gardeners who want an easy-to-use, multi-purpose product that feeds roses and protects them from pests and diseases without frequent reapplications. However, if you’re looking specifically for an organic option or a product focused solely on feeding with detailed micronutrients, this might not fully meet those needs.