If you aren’t someone who makes frequent purchases, selecting the best Best Slow Release Fertilizer won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top Best Slow Release Fertilizer. Have a look at the products on our list, and pick the ones that appeal to you the most.
We researched and tested Best Slow Release Fertilizer in the market to get you this list. Our most recommended product is Osmocote Best Slow Release Fertilizer. Check out our picks for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!
Editor's Choice
Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.
Premium Pick
Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 8 lb.
Budget Pick
Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential
Top 9 Best Slow Release Fertilizer
We researched and compared the top products in the Best Slow Release Fertilizer category to provide you with these recommendations.
1. Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb.
- 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
2. Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 8 lb.
- OSMOCOTE QUALITY: Osmocote is the original slow-release plant food. Decades of rigorous field testing confirm product effectiveness with hundreds of plant species in a variety of climate and soil conditions.
- OSMOCOTES BEST FORMULA: Each homogeneous granule contains 15-9-12 NPK plus micro and secondary nutrients and feeds up to 6 full months.
- OSMOCOTES SECRET: Soil temperature controls how Osmocote releases its nutrients, and more importantly how nutrients are taken up by the plant. Replenishment and feeding are in natural harmony.
- OSMOCOTES DIRECTIONS FOR USE: 1 pound of Osmocote covers 37.5 sq. ft. (approx. 6 x 6). Works best when mixed into 1 3 inches of soil. Package includes applicator. In containers, mix 1 pound with 19 gallons of potting soil.
- OSMOCOTE IS MISTAKE-PROOF: Even if over-applied up to 3x the recommended rate, Osmocote does not burn the plant.
- OSMOCOTE CONFIDENCE: Performance is guaranteed. If unsatisfied, return the empty package to The Scotts Company for a full refund.
3. Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential
- Osmocote Smart-Release Plant Food Plus Outdoor & Indoor 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 & Indoor covers up to 75 sq. ft.
4. Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up
- 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
- Contains natural ingredients that help feed and nourish above and below the soil
5. Burpee Natural Purpose Granular 4-Lb Organic Food for Growing Strong Plants | Good for Vegetable
- FEED YOUR PLANTS: Burpee's All-Purpose Organic Plant Food is formulated to keep your plants growing and happy throughout the season. Major nutrients as well as calcium, minor nutrients, and some of the beneficial microbes that help keep the soil and plants healthy are released immediately and continue to feed your plants for up to 3 months.
- FOR VEGETABLES, FLOWERS & HERBS: Use this natural plant food for seed starting, bedding plants, vegetable gardens, trees, shrubs and flower containers. OMRI labeled organic. The custom blend promotes plant growth and more blooms! Great for indoor or outdoor plants.
- ORGANIC CERTIFIED: OMRI listed for organic gardening use, this plant food safely keeps your soil and plants as healthy as they can be. Easy to apply granules release essential nutrients and deliver fast-acting results for all types of plants in your home garden. Follow instructions on the bag for how much plant food to apply.
- GREAT FOR CONTAINERS: Use this balanced mix to promote growth of flowers, vegetable and herbs in patio pots and containers. You'll see the difference in plant health, fruit production and vibrancy of blooms. A natural fertilizer for growing your best garden.
- Since 1876: Generations of customers have trusted Burpee to deliver the highest quality products and service. Gardeners rely on Burpee for accurate plant information and how-to tips that make gardening easier and more successful. Lets grow together!
6. Osmocote Smart-Release Plant Food Plus Outdoor & Indoor₁, Granular Fertilizer with 11 Essential
- Osmocote Smart-Release Plant Food Plus Outdoor & Indoor 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 & Indoor covers up to 300 sq. ft.
7. RAINFLOW 11.28 OZ Slow Release Fertilizer - Organic Plant Food All Purpose Plant Fertilizer for
- Balanced Nutrient Formula: This slow release fertilizer contains 14-13-13 NPK to provide comprehensive nutritional support to promote healthy plant growth and is suitable for various gardening and agricultural needs
- Organic Fertilizer for Plants: Our organic plant food is made with a special slow release technology that releases nutrients for up to 180 days, reducing the frequency of fertiliser applications and saving time and effort
- Slow Release Plant Fertilizer: This garden fertilizer not only enhances plant root development and loosens the soil, but also promotes flowering and fruiting, giving plants nutrition and protection
- Versatile Applications: Our all purpose plant fertilizer is suitable for orchids, succulents, cacti, vegetables and many other flowers and plants, providing balanced nutrients suitable for different kinds of plants and gardening projects
- Easy to Use: The granular fertilizer is easy to spread and mix, suitable for home gardening and large scale planting. Beginners and gardening enthusiasts can easily get started without complicated fertilizer application operations
8. Southern Ag All Purpose Granular Fertilizer 10-10-10, 5 LB Size: 5 LB
9. Indoor Plant Food - All-Purpose Fertilizer (Liquid Alternative) - Best for Houseplants Indoors +
- NUTRIENT ESSENTIALS - Premium, urea free balanced mix of macro and micro nutrients that gently feeds all potted household plants. Helps encourage strong roots, new growth, and beautiful leaves for sustainable long term plant vigor.
- LASTS LONGER, FOR LESS - Easy to use, slow release granular formula feeds the plants around your house for months at a time! Simply poke holes or sprinkle around your potting mix, water, and watch your plants thrive! Perfect for pots with bark, sphagnum moss, perlite, and other organic soil mixes.
- TRULY ALL-PURPOSE - Great for advanced and beginners in plant care. Use with all common houseplant types (indoor and outdoor) in various pots and containers. Ideal to use on live plants around the entire house, apartment, and office.
- GROW WITH CONFIDENCE - Our fertilizer is made with you in mind. Whether this is your first plant or your 100th, you can rest assured our ready to use fertilizer is easy to understand and easy to apply.
- FOR POPULAR HOUSEPLANTS - Fiddle leaf fig, snake plant, orchids, bonsai trees, spider, string of pearls, monstera, pothos, zz, bamboo, peace lily, aloe vera, prayer, hoya, mums, ivy, elephant ear, palm, fern, pilea, philodenron, dracaena, chinese evergreen, succulents, cactus, jasmine, money tree, other hanging and trailing plants, terrarium plants, tropical plants and many more!
Peter
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