• 10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More 1
  • 10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More 2
  • 10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More 3
  • 10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More 4
  • 10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More 5

10 Best Indoor Plant Foods UK 2022 | Miracle-Gro, Gro-Sure and More

To keep your indoor plants happy and healthy, you need to provide them with all the nutrients and minerals they need to grow big and strong. Potted house plants don't have the same access to the naturally occurring organic materials that outside plants do, so you'll need to make sure the soil is rich in nitrogen, phosphorous, and potassium.


Whether you have a collection of succulents or yukkas, an indoor spider plant jungle, or some simple flowerbeds to brighten up a room, we've picked the best indoor plant foods available in the UK to keep them healthy. We've included options from some of the top brands in the business, like Miracle-Gro, Baby Bio, and Marphyl, in liquid powder and pellet forms so that you can make the right choice for your plants! 

This Article's Contributors

mybest Editing Team
  • Last updated: 11-08-2022
Table of Contents

How to Choose Indoor Plant Foods in the UK

Key Points to Consider

  1. Select a Food That Suits Your Plants, Budget and Convenience Level
  2. Pick the Right Food by Understanding the NPK Ratio

1. Decide on the Type of Plant Food Depending on Convenience, Value for Money and the Types of Plants You Have

1. Decide on the Type of Plant Food Depending on Convenience, Value for Money and the Types of Plants You Have

Use Liquid Plant Food for a Fast-Acting and Easy Way to Give Drooping Plants the Nutrition They Need

As liquid plant food penetrates the soil straight away, your plants will have immediate access to the nutrients, making it an excellent choice for plants that show visible signs of drooping when they need feeding. It's extremely easy to apply by simply adding a little food to the watering can when you water your plants.


Just make sure to follow the instructions carefully and check whether the plant food is a liquid concentrate that has to be diluted or can be directly applied. The strength of different liquid fertilizers can vary dramatically, and the amount will often depend on the types of plants you own, so getting the balance right can take a little getting used to.

Opt For Powdered Food if You Have Lots of Plants to Feed and Want to Save Some Money

Powered plant feed is similar to liquid concentrate due to the fact that you have to measure out the right amount, add it to some water, and then water your plants with it. It also tends to be the most economically beneficial option as they're often sold in large boxes and tubs that last a long time and can be easily tucked away in a cupboard.


The main drawback is that powdered plant food is an irritant and is more fiddly to prepare than the other options. It's recommended to use gloves when scooping out the powder, but you also have to make sure the correct amount is added and dissolved properly. However, if you have a lot of plants and are looking to save some money, it's the best way to go.

Pick Slow Release Pellets for a Convenient Way to Feed Plants That Don’t Require a Lot of Watering

If you don't fancy the hassle of mixing a liquid or powder into a watering can or are a little forgetful when it comes to watering your plants, you could opt for slow-release food pellets instead. This type of plant food is the most convenient as you just mix the pellets in with the soil, and you're done! These pellets also often last an entire season, from spring to spring, taking away the need for regular feeding.


With many things in life, this convenience does come with an added cost upfront, but when you consider how long they last, it's really not too bad. This works especially well for plants that don't need to be regularly watered, like succulents, air plants, snake plants, and cacti.


If you have a feline friend, consider picking up some cat-safe plants to brighten up your home!

2. Check the NPK Ratio of the Plant Food to Ensure You’re Picking the Right One for Your Types of Plants

2. Check the NPK Ratio of the Plant Food to Ensure You’re Picking the Right One for Your Types of Plants

One of the most confusing things about buying indoor plant food is trying to decipher the NPK ratio, which is the amount of Nitrogen (N), Phosphate (P), and Potassium (K) found in plant food. All plants require these three elements as they serve different purposes:


  • Nitrogen is responsible for healthy stem and leaf growth, making it extremely important for tropical plants with large leaves needing strong stems, like rubber plants and fiddle leaf figs.

  • Phosphate helps with everything under the soil, most notably a plant's root system. This is often more important when growing vegetables rather than house plants.

  • Potassium is crucial when growing flowers and fruits as it is responsible for their production but less important for plants that don't flower or produce fruit.

Find the right home for your plant with an indoor plant pot!

Compare the Best Indoor Plant Foods

For those after a quick look, here is our Top 5:


  1. Miracle-Gro - All Purpose Water Soluble Plant Food for £5.99
  2. Miracle-Gro - All Purpose Continuous Release Plant Food for £13.90
  3. Baby Bio - Houseplant Food for £0.97
  4. Marphyl - Marine Phytoplankton for £9.90
  5. Gro-Sure - 6 Month Slow Release Plant Food for £12.00

This article's chosen EC site price listings are reflective of its publishing date.

Image
1
Miracle-Gro All Purpose Water Soluble Plant Food 1

Miracle-Gro

2
Miracle-Gro All Purpose Continuous Release Plant Food 1

Miracle-Gro

3
Baby Bio Houseplant Food 1

Baby Bio

4
Marphyl Marine Phytoplankton 1

Marphyl

5
Gro-Sure  6 Month Slow Release Plant Food 1

Gro-Sure

6
Miracle-Gro Performance Organics All Purpose Liquid Plant Food 1

Miracle-Gro

7
Flower Power Richard Jackson's Premium Plant Food 1

Flower Power

8
Miracle-Gro All Purpose Concentrated Liquid Plant Food  1

Miracle-Gro

9
Miracle-Gro Pump & Feed All Purpose Plant Food 1

Miracle-Gro

10
Phostrogen  All Purpose Plant Food 1

Phostrogen

Name

All Purpose Water Soluble Plant Food

All Purpose Continuous Release Plant Food

Houseplant Food

Marine Phytoplankton

6 Month Slow Release Plant Food

Performance Organics All Purpose Liquid Plant Food

Richard Jackson's Premium Plant Food

All Purpose Concentrated Liquid Plant Food

Pump & Feed All Purpose Plant Food

All Purpose Plant Food

Features

The Water Soluble Food From the Nation’s Best Selling Brand That Will Last for Ages

A Slow Release Pellet Option With a Balanced NPK That’s Suitable for All Types of Plants

One of the Best Budget-Friendly Liquid Concentrates for Promoting Greener Leaves

Non-Toxic and Sustainably Made Option Featuring Microalgae That's Great for Heathers and Ferns

An Affordable 2 kg Tub of Slow Release Pellets That Will Last You for Years

An Organic Option that's Great for Indoor Fruit and Veg and Is Child, Bee and Pet-Safe

A Large Tub of the Award-Winning Premium Powder That’s Fantastic for Flowers

A Great All-Purpose, Highly-Balanced Option Suitable for All Different Types of Plants

A Pump Option That Feeds Directly to the Soil and Is Quick, Convenient and Easy-To-Use

A Bargain Offering That Promotes a Healthy Root System and Is Great for Sick Plants

Price£5.99£13.90£0.97£9.90£12.00£5.40£29.99£7.00£3.75£6.39
TypePowderPelletsLiquidLiquidPelletsLiquidPowderLiquidLiquidPowder
NPK24-8-1617-9-1110.6-4.4-1.7-12-7-19-12-12-366-3-6-16-20-24
Best ForLeafy plants, flowersAllLeafy plantsHeathers, ferns, air plantsFlowers, fruitsFruits, vegetables Flowers, fruitsAllConvenienceAll plants
Volume2 kg990 g 175 ml500 ml2 kg1000 ml1.5 kg1000 ml200 ml400 g
Link

10 Best Indoor Plant Foods in the UK

This ranking has been compiled by the writing team at mybest UK via careful evaluation of the points made in the buying guide and thorough research of each product and comparing multiple verified customer reviews across the EC sites used.

1

Miracle-GroAll Purpose Water Soluble Plant Food

£5.99

TypePowder
NPK24-8-16
Best ForLeafy plants, flowers
Volume2 kg
2

Miracle-GroAll Purpose Continuous Release Plant Food

£13.90

Type Pellets
NPK17-9-11
Best ForAll
Volume990 g
3

Baby BioHouseplant Food

£0.97

TypeLiquid
NPK10.6-4.4-1.7
Best ForLeafy plants
Volume175 ml
4

MarphylMarine Phytoplankton

£9.90

TypeLiquid
NPK-
Best ForHeathers, ferns, air plants
Volume500 ml
5

Gro-Sure 6 Month Slow Release Plant Food

£12.00

TypePellets
NPK12-7-19
Best ForFlowers, fruits
Volume2 kg
6

Miracle-GroPerformance Organics All Purpose Liquid Plant Food

£5.40

TypeLiquid
NPK-
Best ForFruits, vegetables
Volume1000 ml
7

Flower PowerRichard Jackson's Premium Plant Food

£29.99

TypePowder
NPK12-12-36
Best ForFlowers, fruits
Volume1.5 kg
8

Miracle-GroAll Purpose Concentrated Liquid Plant Food

£7.00

TypeLiquid
NPK6-3-6
Best ForAll
Volume1000 ml
9

Miracle-GroPump & Feed All Purpose Plant Food

£3.75

TypeLiquid
NPK-
Best ForConvenience
Volume200 ml
10

Phostrogen All Purpose Plant Food

£6.39

TypePowder
NPK16-20-24
Best ForAll plants
Volume400 g

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Written and researched by David Sexton

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