Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Best Slow Release Fertilizers of 2025
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Best Choice
1
Miracle-GroMiracle-Gro Continuous Release Plant Food, 2 kg Tub
9.7
ExceptionalOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.9
Simple to use9.7
Long life9.7
DurabilityShow moreWhy we love it
This product will help to feed your plants for an extended period of time, removing the need for regular feeding.
The temperature controlled coating releases nutrients only when conditions are ideal for feeding, making it perfect for all types of plants.
This product is especially well suited for fruit and vegetables, and can be used in beds, borders, pots, containers, and hanging baskets.
2
WestlandWestland Growmore 8kg
10% Off9.6
ExceptionalOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
3
Miracle-GroMiracle-Gro Continuous Release All Purpose Plant Food, 900G, White
Free Shipping9.3
ExcellentOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.9
Simple to use9.7
Durability9.5
worth the moneyShow moreWhy we love it
Temperature controlled coating ensures that nutrients are released when plants need them most.
One application at the start of spring means that you dont have to worry about regularly feeding your plants.
Contains essential nutrients for strong, healthy plants.
4
WestlandWestland Boost Slow Release Plant Food 750g, Blue
14% Off Free Shipping9.0
ExcellentOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Show moreWhy we love it
Boosts root growth effectively.
Enhances plant resilience and flowering.
Provides long-lasting nutrient supply.
Value for Money
5
Gro-SureGro-Sure 6 Month Slow Release Plant Food, 1.1 kg
44% Off Free Shipping8.9
Very GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.7
Simple to use9.3
worth the moneyShow moreWhy we love it
Quickly energizes plants
6mo continuous feed
Suitable for all non ericaceous plants
6
WestlandWestland Boost Slow Release Plant Food 2kg, Blue
8.8
Very GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Show moreWhy we love it
Boosts root growth effectively.
Enhances plant resilience.
Promotes lush, green foliage.
7
GouldingGoulding G60114 Slow Release Fertiliser General Purpose Granular Plant Feed, Brown
Free Shipping8.7
Very GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.3
Simple to use8.7
Instruction8.2
worth the moneyShow moreWhy we love it
Conditions and enriches soil for healthier plants.
Produces stronger roots and vibrant blooms.
Lasts up to 6 months, value for money.
8
WestlandWestland 20600098 Growmore Balanced Garden Fertiliser For All Plants, 4 kg, Natural
Free Shipping8.4
GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.7
Easy to use9.5
Simple to use9.1
worth the moneyShow moreWhy we love it
Balanced, fast-acting fertilizer for various plants.
Versatile use for flowers, trees, and vegetables.
Easy application every 4-6 weeks for best results.
9
Miracle-GroMiracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg, Green, Brown
8.3
GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.9
Simple to use9.9
Durability9.5
worth the moneyShow moreWhy we love it
Feeds plants for a long time
Automatically releases nutrients
Ideal for all types of plants
10
OsmocoteOsmocote Controlled Release Plant Food Tablets 25x5g
Free Shipping8.2
GoodOur Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9.9
Simple to use8.9
worth the moneyShow moreWhy we love it
Premium quality
Time released nutrients
25 tablets per pack