Best Fertilizer For Outdoor Plants In September 2026

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There is always a perfect Best Fertilizer For Outdoor Plants out there in the market for you. However, you may not have the time and resources to try and research each of them in detail. So we’ve done the heavy lifting and are sharing below our detailed review of Top 10 Best Fertilizer For Outdoor Plants.

To help you in your search, we have completed this list of the Best Fertilizer For Outdoor Plants.

Top Rated Best Fertilizer For Outdoor Plants Of 2026

Rank	Product Name	Score
1	Miracle-Gro Tree & Shrub Plant Food Spikes, 12 Spikes/Pack Buy Now	9.7 Buy Now
2	Miracle-Gro Garden Feeder with 1-Pound Miracle-Gro All Purpose Plant Food Buy Now	9.5 Buy Now
3	Miracle-Gro Shake 'N Feed All Purpose Plant Food, 4.5 lb Buy Now	9.1 Buy Now
4	Jobe's Organics All Purpose Fertilizer Spikes, 50 Spikes Buy Now	8.8 Buy Now
5	Miracle-Gro Water Soluble All Purpose Plant Food, 10 lb Buy Now	8.6 Buy Now
6	Scotts Super Bloom Water Soluble Plant Food, 2 lb - NPK 12-55-6 Buy Now	8.3 Buy Now
7	Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb Buy Now	8.1 Buy Now
8	Miracle-Gro Performance Organics All Purpose Plant Nutrition Granules, 2.5 lb. - All-Purpose Plant Buy Now	7.8 Buy Now
9	Dr. Earth 703P Organic 4 Azalea/Camellia/Rhododendron Acid Fertilizer in Poly Bag, 4-Pound Buy Now	7.5 Buy Now
10	Osmocote 274850 Smart-Release Plant Food Plus Outdoor & Indoor, 8 lbs Buy Now	7.2 Buy Now

1. Miracle-Gro Tree & Shrub Plant Food Spikes, 12 Spikes/Pack

• Feed once per season in spring and fall
• Contains natural ingredients
• Easy-to-use spikes release nutrients directly into the root zone to help promote strong trees and shrubs
• Promotes vibrant color and lush foliage
• Also great for use on evergreens and acid loving plants

2. Miracle-Gro Garden Feeder with 1-Pound Miracle-Gro All Purpose Plant Food

• Includes 1 lb. of miracle-gro water soluble all purpose plant food
• Feed every 1-2 weeks for best results
• For all outdoor plants including flowers, vegetables, trees and shrubs
• Trigger lock for one-handed feeding
• Features three spray patterns: shower, jet and flat

3. Miracle-Gro Shake 'N Feed All Purpose Plant Food, 4.5 lb

• Full of essential nutrients that help feed and nourish above and below the soil
• Contains natural ingredients that help feed and nourish above and below the soil
• Guaranteed not to burn when used as directed
• For use in ground and in containers, feeds up to 3 months
• Contains vital micronutrients to grow stronger, vibrant and more productive plants versus unfed plants

4. Jobe's Organics All Purpose Fertilizer Spikes, 50 Spikes

• Jobes biozome improves soil conditions, helps resist disease, insects, and drought during the growing season
• No mess easy to use spikes, prevents waste and run-off, guaranteed analysis: (4-4-4) 50 spikes in resealable bag
• Organic fertilizer spikes, time release fertilizer, pre-measured to provide plants with nourishment at their roots
• Contains jobes biozomethe proprietary microorganism archaea that aggressively breaks down material for faster results
• Omri listed for organic gardening by usda, certified organic means no synthetic chemicals

5. Miracle-Gro Water Soluble All Purpose Plant Food, 10 lb

• Full of essential nutrients, it instantly feeds to grow bigger, more beautiful plants versus unfed plants
• Safe for all plants, guaranteed not to burn when used as directed
• For all flowers, vegetables, trees, shrubs and houseplants
• Feed every 1 to 2 weeks
• Use with the miracle gro garden feeder or any watering can

6. Scotts Super Bloom Water Soluble Plant Food, 2 lb - NPK 12-55-6

• Feed every 1-2 weeks for best results
• For outdoor flowers, fruiting plants, containers and bed areas
• Water-soluble plant food feeds plants instantly
• Contains high phosphorus to help plants bloom
• Won't burn your plants when used as directed

7. Osmocote Smart-Release Plant Food Plus Outdoor & Indoor, 1 lb

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

8. Miracle-Gro Performance Organics All Purpose Plant Nutrition Granules, 2.5 lb. - All-Purpose Plant

• In as little as 7 days you'll start to see results (vs unfed plants)
• The shaker jug makes feeding in-ground and container plants easy
• Enjoy miracle-gro results with organic, all natural ingredients
• Reapply every 4-6 weeks and water regularly for best results
• Use miracle-gro performance organics all purpose plant nutrition granules to feed your plants, flowers, vegetables, and herbs

9. Dr. Earth 703P Organic 4 Azalea/Camellia/Rhododendron Acid Fertilizer in Poly Bag, 4-Pound

• Provides continuous feed for several months
• 100-percent organic formula provides optimum levels of essential plant nutrients, eliminates the need for chemical fertilizers when used as directed
• Available in a 4lb size
• People and pets safe when used as directed
• Contains pro-biotic, seven champion strains of beneficial soil microbes plus ecto and endo mycorrhizae
• Exceptional results because nutrients are released quickly, feeds for several months

10. Osmocote 274850 Smart-Release Plant Food Plus Outdoor & Indoor, 8 lbs

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