10 Best slow release fertilizer (2025)

• Osmocote Smart-Release Plant Food Plus Indoor & Outdoor is fortified with 11 essential nutrients
• This plant food feeds plants for up to 6 months with all-in-one granules, each containing 15-9-12 NPK and secondary nutrients
• For indoor and outdoor plants, this all-purpose plant food works with virtually all plant types and growing conditions, including containers and in-ground gardens
• To apply to outdoor container and in-ground plants, sprinkle 1 scoopful per 2 gal. pot or 4 sq. ft. of garden area and mix into the top 1-3 inches of soil; water regularly and reapply every 6 months
• One 8 lb. container of Osmocote Smart-Release Plant Food Plus Indoor & Outdoor feeds approximately 300 sq. ft. of garden area

• Our best formula, fortified with 11 essential nutrients
• Works with virtually all plant varieties, in all growing conditions
• Feeds up to 6 full months
• Apply with confidence to potted plants, indoors or outdoors
• No-burn pledge when used as directed

• 🌿 Balanced 10-10-10 Granular Fertilizer for Outdoor & Indoor Plants: All-purpose plant food with 10% Nitrogen, 10% Phosphorus, and 10% Potassium. Perfect for outdoor vegetable gardens, fruit trees, evergreens, shrubs, lawns, and flowers. Also great for potted plants and indoor gardening. One solution for all your plant needs!
• ⏳ Slow-Release Formula for Continuous Outdoor Feeding: Provides up to 8 weeks of sustained nutrition with fewer applications. Ideal for outdoor lawns, vegetable gardens, fruit trees, and flowering plants. Apply twice per season for gardens and three times per year for trees and shrubs. Less work, more growth!
• 🌼 Promotes Strong Roots, Lush Growth, and Vibrant Outdoor Blooms: Phosphorus supports root health, Nitrogen fuels lush green leaves, and Potassium enhances plant resilience. Perfect for outdoor flowers, tomatoes, peppers, roses, evergreens, and shrubs. Enjoy thriving plants, colorful blooms, and abundant harvests!
• 🌱 Easy-to-Apply Granules for Even Outdoor Coverage: Fine granules spread evenly for maximum soil absorption in outdoor gardens, lawns, and landscapes. Ideal for pines, oaks, banana trees, fig trees, and ornamentals. Just spread, water, and watch your outdoor garden flourish!
• ⚡ Quick-Release Nitrogen for Immediate Outdoor Results: Instant nitrogen boost for rapid growth, combined with slow-release feeding for lasting results. Perfect for outdoor grass lawns, evergreen trees, flowering plants, and vegetables. See your outdoor garden thrive quickly and sustainably!

• Miracle-Gro Shake 'N Feed All Purpose Plant Food feeds plants for up to 3 months, and nourishes above and below the soil
• This plant food contains vital micronutrients to grow stronger, vibrant, and more productive plants (vs unfed plants)
• Use this all-purpose plant food with most plants, whether indoor or outdoor container plants or in-ground plants, and most plant types, including flowers, vegetables, and herbs
• Apply this garden product evenly onto the soil and work into the top 1-3 inches of soil for in-ground plants, or lightly work into the soil of established container plants; water to start feeding
• Reapply Miracle-Gro Shake 'N Feed All Purpose Plant Food every 3 months and water regularly for a beautiful garden all season long

• Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁ granular plant food contains 11 essential nutrients and feeds live plants up to 6 full months
• This fertilizer works with virtually all plant varieties and growing conditions
• Each granule is coated with a unique resin that controls nutritional release so plants get what they need when they need it
• Osmocote offers a no-burn pledge, when used as directed
• One 2 lb. container of Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁ covers up to 75 sq. ft.

• Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁ granular plant food contains 11 essential nutrients and feeds live plants up to 6 full months
• This fertilizer works with virtually all plant varieties and growing conditions
• Each granule is coated with a unique resin that controls nutritional release so plants get what they need when they need it
• Osmocote offers a no-burn pledge, when used as directed
• One 8 lb. container of Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁ covers up to 300 sq. ft.

This Southern Ag All Purpose Granular Fertilizer 10-10-10, 5 LB Size: 5 LB is a top choice in . Customers appreciate its quality, performance, and value.

• 12-24-12
• Size: 3.5 Lbs
• Slow Release

• Up to 8-9 Months of Plant Nutrition: This slow-release formula provides consistent nourishment for up to 8-9 months, reducing the frequency of applications.
• Balanced 18-5-12 Formula: A precise blend of nutrients supports strong root development, lush green foliage, and abundant blooms, ideal for a wide range of plants.
• Versatile for Any Garden: Suitable for use in containers, garden beds, and large landscapes, this fertilizer adapts to your growing needs.
• User-Friendly Granules: Easy to apply—just sprinkle and water to activate. A perfect choice for busy gardeners and landscape professionals.
• Available in Various Sizes: Choose from 1 lb, 2 lb, 4 lb, 10 lb, and 15 lb bags to match your project, from small container gardens to extensive landscaping.