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Best Plant Food Outdoor Slow Release of 2026
Last updated on 03/04/2026
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Fertilisers & Plant Food
Multi-Purpose Fertilisers
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1
Vitax Q4 All Purpose Plant Food – Balanced Fertiliser for Flowers, Fruit, Vegetables & Shrubs – Promotes Strong Growth & Rich Blooms – Professional Grade Garden Feed (4.5kg)
MURIEL BARGAINS
Why we love it
Balanced nutrients for all plants.
Trusted formula for robust growth.
Slow release feeding reduces reapplication.
Main Highlights
Comprehensive Nutrient Profile: Formulated with a precision-balanced NPK ratio and essential trace elements, providing a complete nutritional foundation for flowers, fruits, vegetables, and shrubs.
Professional Grade Results: A trusted, high-performance formula used by expert growers to stimulate vigorous foliage growth, deep root development, and abundant flowering across the entire garden.
Versatile Garden Application: One versatile solution suitable for a wide range of settings, including raised beds, hanging baskets, patio containers, and greenhouse crops, eliminating the need for multiple feeds.
Extended Slow-Release Feeding: Designed to release vital nutrients gradually over time, ensuring your plants receive continuous nourishment while reducing the frequency of re-application throughout the season.
Enhanced Flowering and Fruiting: Specifically developed to provide the energy required for high-yielding vegetable crops and bright, long-lasting ornamental blooms in flower borders.
Simple and Flexible Use: Extremely easy to apply as a base dressing before planting or as a top dressing for established plants; simply rake into the soil or water in for rapid nutrient uptake.
Reliable Year-Round Support: Whether used during spring planting or as a mid-season boost, this plant food ensures consistent results, helping your garden stay lush, healthy, and resilient in all weather.
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9.7
Exceptional
Check Price
9.7
Exceptional
MURIEL BARGAINS
Vitax Q4 All Purpose Plant Food – Balanced Fertiliser for Flowers, Fruit, Vegetables & Shrubs – Promotes Strong Growth & Rich Blooms – Professional Grade Garden Feed (4.5kg)
Check Price
Show More
Why we love it
Balanced nutrients for all plants.
Trusted formula for robust growth.
Slow release feeding reduces reapplication.
Main Highlights
Comprehensive Nutrient Profile: Formulated with a precision-balanced NPK ratio and essential trace elements, providing a complete nutritional foundation for flowers, fruits, vegetables, and shrubs.
Professional Grade Results: A trusted, high-performance formula used by expert growers to stimulate vigorous foliage growth, deep root development, and abundant flowering across the entire garden.
Versatile Garden Application: One versatile solution suitable for a wide range of settings, including raised beds, hanging baskets, patio containers, and greenhouse crops, eliminating the need for multiple feeds.
Extended Slow-Release Feeding: Designed to release vital nutrients gradually over time, ensuring your plants receive continuous nourishment while reducing the frequency of re-application throughout the season.
Enhanced Flowering and Fruiting: Specifically developed to provide the energy required for high-yielding vegetable crops and bright, long-lasting ornamental blooms in flower borders.
Simple and Flexible Use: Extremely easy to apply as a base dressing before planting or as a top dressing for established plants; simply rake into the soil or water in for rapid nutrient uptake.
Reliable Year-Round Support: Whether used during spring planting or as a mid-season boost, this plant food ensures consistent results, helping your garden stay lush, healthy, and resilient in all weather.
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Value for Money
2
Grow More Plant Food Fertilizer - 2kg All Purpose 6-Month Slow Release Plant Food Granules for Outdoor Plants with Topline Card. Garden Fertiliser for Plants, Vegetables or Houseplants
Topline
Why we love it
Feeds for 6 months.
Boosts flowers and roots.
Suitable for all plants.
Main Highlights
Indoor or outdoor garden plants feed bulk buy contains: 1 x 2kg Grow more All Purpose 6-months Plant Food with unique Topline Thank You Card. All-Purpose Slow Release Plant Food for use all around the garden. Providing a slow release of food to keep plants healthy and thriving for longer.
Slow Release Plant Food granules is a blend of slow release and fast acting nutrients to keep plants healthy, and thriving for longer. Is a great food for flowers, fruits, vegetables, roses, shrubs and trees in containers.
The fast acting nutrients boost flowers and root growth, whilst the slow release nutrients feed the plant for 6 months and promote a healthy foliage and long lasting blooms. Suitable for all plants and great for baskets and containers.
A blend of slow-releasing granules, plus fast-acting plant food providing nutrients when plants need it most.
The plant pellets can be premixed with compost, top soil before planting, added to the planting hole area or used as a top dressing. Water in the granules to activate.
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9.6
Superb
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9.6
Superb
Topline
Grow More Plant Food Fertilizer - 2kg All Purpose 6-Month Slow Release Plant Food Granules for Outdoor Plants with Topline Card. Garden Fertiliser for Plants, Vegetables or Houseplants
Check Price
Show More
Why we love it
Feeds for 6 months.
Boosts flowers and roots.
Suitable for all plants.
Main Highlights
Indoor or outdoor garden plants feed bulk buy contains: 1 x 2kg Grow more All Purpose 6-months Plant Food with unique Topline Thank You Card. All-Purpose Slow Release Plant Food for use all around the garden. Providing a slow release of food to keep plants healthy and thriving for longer.
Slow Release Plant Food granules is a blend of slow release and fast acting nutrients to keep plants healthy, and thriving for longer. Is a great food for flowers, fruits, vegetables, roses, shrubs and trees in containers.
The fast acting nutrients boost flowers and root growth, whilst the slow release nutrients feed the plant for 6 months and promote a healthy foliage and long lasting blooms. Suitable for all plants and great for baskets and containers.
A blend of slow-releasing granules, plus fast-acting plant food providing nutrients when plants need it most.
The plant pellets can be premixed with compost, top soil before planting, added to the planting hole area or used as a top dressing. Water in the granules to activate.
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3
Westland Growmore 8kg
Westland
14% Off
Why we love it
Promotes enriched, nutrient-dense growth.
Enhances root and floral development.
Contributes to soil fertility.
Main Highlights
Ready to use & rich in essential nutrients
Nitrogen boosts green growth
Phosphorus boosts roots to grow bigger & stronger
Potassium boosts flowers
Helps build soil fertility
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9.6
Superb
Check Price
9.6
Superb
Westland
Westland Growmore 8kg
14% Off
Check Price
Show More
Why we love it
Promotes enriched, nutrient-dense growth.
Enhances root and floral development.
Contributes to soil fertility.
Main Highlights
Ready to use & rich in essential nutrients
Nitrogen boosts green growth
Phosphorus boosts roots to grow bigger & stronger
Potassium boosts flowers
Helps build soil fertility
Show More
4
TOPLINE Universal Growmore Fertiliser Granules - 8kg Multipurpose Plant Food for All Garden Plants. Outdoor Plants Feed Fertilizer with Topline Card.
WOOTONG
9.4
Superb
Check Price
9.4
Superb
WOOTONG
TOPLINE Universal Growmore Fertiliser Granules - 8kg Multipurpose Plant Food for All Garden Plants. Outdoor Plants Feed Fertilizer with Topline Card.
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5
Miracle-Gro Premium All Purpose Continuous Release Plant Food, 2 kg, White
Miracle-Gro
Why we love it
Controls nutrient release optimally.
One-season feeding convenience.
Promotes strong, healthy plants.
Main Highlights
Temperature controlled coating that regulates the release of nutrients when the conditions are right for feeding
One application at the start of spring will feed your plants for the whole season, removing the need for regular feeding
Contains essential nutrients for strong healthy plants
Model number: 121069
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9.3
Superb
Check Price
9.3
Superb
Miracle-Gro
Miracle-Gro Premium All Purpose Continuous Release Plant Food, 2 kg, White
Check Price
Show More
Why we love it
Controls nutrient release optimally.
One-season feeding convenience.
Promotes strong, healthy plants.
Main Highlights
Temperature controlled coating that regulates the release of nutrients when the conditions are right for feeding
One application at the start of spring will feed your plants for the whole season, removing the need for regular feeding
Contains essential nutrients for strong healthy plants
Model number: 121069
Show More
6
Westland Boost Slow Release Plant Food 2kg
Westland
7% Off
Why we love it
Boosts root growth effectively.
Promotes lush green foliage.
Enhances flowering and resilience.
Main Highlights
Instant nutrients and bio-stimulant will boost root growth
Targeted nitrogen feed will give lush green foliage
Slow release feed for 6-moth nutrient supply helps boost disease resistance
High potassium levels will promote flowering, fruit production and plant resilience
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9.1
Superb
Check Price
9.1
Superb
Westland
Westland Boost Slow Release Plant Food 2kg
7% Off
Check Price
Show More
Why we love it
Boosts root growth effectively.
Promotes lush green foliage.
Enhances flowering and resilience.
Main Highlights
Instant nutrients and bio-stimulant will boost root growth
Targeted nitrogen feed will give lush green foliage
Slow release feed for 6-moth nutrient supply helps boost disease resistance
High potassium levels will promote flowering, fruit production and plant resilience
Show More
7
Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg, Green, Brown
Miracle-Gro
5% Off
Why we love it
Long-lasting, low-maintenance plant care solution.
Temperature controlled for optimal feeding.
Versatile for diverse gardening needs.
Main Highlights
Feeds plants for up to 6 months, removing the needs for regular feeding
Temperature controlled coating releases nutrients only when conditions are right for feeding
Ideal for all types of plants and suitable for fruit and vegetables
Ideal for beds, borders, pots, containers and hanging baskets
Feeds up to 40 plants
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8.9
Excellent
Check Price
8.9
Excellent
Miracle-Gro
Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg, Green, Brown
5% Off
Check Price
Show More
Why we love it
Long-lasting, low-maintenance plant care solution.
Temperature controlled for optimal feeding.
Versatile for diverse gardening needs.
Main Highlights
Feeds plants for up to 6 months, removing the needs for regular feeding
Temperature controlled coating releases nutrients only when conditions are right for feeding
Ideal for all types of plants and suitable for fruit and vegetables
Ideal for beds, borders, pots, containers and hanging baskets
Feeds up to 40 plants
Show More
8
Miracle-Gro All Purpose Continuous Release Plant Food 900g | Feeds Plants for Up to 6 Months | Ideal for Pots, Beds & Containers | Slow-Release Fertiliser for Healthy Growth
MURIEL BARGAINS
Why we love it
Long-lasting nourishment for plants.
Supports vibrant growth and health.
Easy application for all plants.
Main Highlights
Slow-release plant food for long-lasting nourishment – designed to feed plants gradually for up to 6 months.
Supports vibrant flowers, healthy foliage & strong roots – delivers balanced nutrients for consistent growth.
Ideal for use in pots, containers, borders & hanging baskets – suitable for both indoor and outdoor plants.
One application feeds the entire season – reduces the need for frequent feeding or reapplication.
Moisture control technology – helps plants absorb nutrients efficiently and prevents waste.
Perfect for all types of flowers, shrubs, and edibles – versatile formula supports a wide range of plant types.
Easy-to-use granular format – simply mix into the soil at planting or apply to the soil surface.
900g pack treats up to 26 average-sized plants – excellent value for routine garden maintenance.
Show More
8.7
Excellent
Check Price
8.7
Excellent
MURIEL BARGAINS
Miracle-Gro All Purpose Continuous Release Plant Food 900g | Feeds Plants for Up to 6 Months | Ideal for Pots, Beds & Containers | Slow-Release Fertiliser for Healthy Growth
Check Price
Show More
Why we love it
Long-lasting nourishment for plants.
Supports vibrant growth and health.
Easy application for all plants.
Main Highlights
Slow-release plant food for long-lasting nourishment – designed to feed plants gradually for up to 6 months.
Supports vibrant flowers, healthy foliage & strong roots – delivers balanced nutrients for consistent growth.
Ideal for use in pots, containers, borders & hanging baskets – suitable for both indoor and outdoor plants.
One application feeds the entire season – reduces the need for frequent feeding or reapplication.
Moisture control technology – helps plants absorb nutrients efficiently and prevents waste.
Perfect for all types of flowers, shrubs, and edibles – versatile formula supports a wide range of plant types.
Easy-to-use granular format – simply mix into the soil at planting or apply to the soil surface.
900g pack treats up to 26 average-sized plants – excellent value for routine garden maintenance.
Show More
9
Goulding G60114 Slow Release Fertiliser General Purpose Granular Plant Feed, Brown
Goulding
Why we love it
Enriches and conditions the soil.
Boosts stronger root development.
Healthier plants, vibrant blooms.
Main Highlights
Conditions & enriches soil
Produces stronger roots
Healthier plants and vibrant blooms
Enriches soil with humics
Lasts up to 6 months
720g
Show More
8.7
Excellent
Check Price
8.7
Excellent
Goulding
Goulding G60114 Slow Release Fertiliser General Purpose Granular Plant Feed, Brown
Check Price
Show More
Why we love it
Enriches and conditions the soil.
Boosts stronger root development.
Healthier plants, vibrant blooms.
Main Highlights
Conditions & enriches soil
Produces stronger roots
Healthier plants and vibrant blooms
Enriches soil with humics
Lasts up to 6 months
720g
Show More
10
Gro-Sure All Purpose Slow Release Plant Food Dual Action Granules for Long-Lasting Blooms Slow Release Nutrients Ideal for Flowers, Fruits & Vegetables Feeds for 6 Months (1.1Kg Jar)
TOP SAVER
Why we love it
Long-lasting blooms enhance gardens.
Versatile for all plant types.
Easy application for any gardener.
Main Highlights
🌱 Long-Lasting Blooms: Promotes vibrant, long-lasting flowers by supporting healthy root systems and foliage growth.
🌱 Ideal for All Plants: Suitable for a wide range of plants including flowers, fruits, vegetables, trees, and shrubs, ensuring versatility in your garden.
🌱 Perfect for Baskets & Containers: Specially designed for pots, tubs, hanging baskets, and garden beds, making it a great choice for all types of gardening.
🌱 Easy to Use: Can be premixed with compost, added to planting holes, or used as a top dressing, offering a simple solution for feeding plants.
🌱 Boosts Root & Flower Growth: The fast-acting nutrients provide an instant boost to roots and flowers, helping plants grow stronger and healthier from the start.
Show More
8.7
Excellent
Check Price
8.7
Excellent
TOP SAVER
Gro-Sure All Purpose Slow Release Plant Food Dual Action Granules for Long-Lasting Blooms Slow Release Nutrients Ideal for Flowers, Fruits & Vegetables Feeds for 6 Months (1.1Kg Jar)
Check Price
Show More
Why we love it
Long-lasting blooms enhance gardens.
Versatile for all plant types.
Easy application for any gardener.
Main Highlights
🌱 Long-Lasting Blooms: Promotes vibrant, long-lasting flowers by supporting healthy root systems and foliage growth.
🌱 Ideal for All Plants: Suitable for a wide range of plants including flowers, fruits, vegetables, trees, and shrubs, ensuring versatility in your garden.
🌱 Perfect for Baskets & Containers: Specially designed for pots, tubs, hanging baskets, and garden beds, making it a great choice for all types of gardening.
🌱 Easy to Use: Can be premixed with compost, added to planting holes, or used as a top dressing, offering a simple solution for feeding plants.
🌱 Boosts Root & Flower Growth: The fast-acting nutrients provide an instant boost to roots and flowers, helping plants grow stronger and healthier from the start.
Show More
