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best-indoor-plant-food-review-uk

The UK's bestIndoor Plant Food2022 Review

What To Look For in a Indoor Plant Food

Indoor plant food comes in either liquid, granular, or solid form. Concentrated solutions that need diluting tend to offer the best value for money

Personally, I think that concentrated plant food which is dispensed from a dropper or pump bottle is the easiest to use. This is because there’s no measuring required. 

If your plants are looking unhealthy, a liquid plant food could be the best solution. They offer reasonably fast-acting results because the formula is easily absorbed by the plant. Alternatively, consider a granular/solid slow-release fertiliser for gradual absorption. These can last up to three months, so they’re a low maintenance option too.

You’ll also need to look out for the ratio of nitrogen, phosphorus and potassium. This is known as the ‘NPK ratio’. Higher levels of nitrogen can help with leafy growth. If you want your plant’s roots to grow specifically, look for a food higher in phosphorus. For indoor fruits like tomatoes, choose a plant food with a higher potassium ratio, as this boosts fruit production. 

If you are looking for an environmentally-friendly option, choose a plant-based, organic fertiliser. These are made from natural, non-toxic ingredients (though you should always double check the label).

After comparing several plant foods, my top recommendation is the Baby Bio Fertiliser for Houseplants. This concentrated formula is a great all-rounder. It’s inexpensive, yet contains 175 ml of plant food that lasts a long time. With a slightly higher nitrogen concentration than phosphorus and potassium, it’s ideal for giving foliage and leaves a boost. 

Below, you’ll find reviews of some of the best indoor plant foods on the market, including my top recommended product.

What Are The UK's Best Indoor Plant Foods?

IMAGE RECOMMENDED PRODUCTSPRODUCT FEATURES
best-indoor-plant-food Baby Bio Fertiliser for Houseplants
  • Concentrated formula
  • A good all-rounder
  • Tried and trusted brand
best-indoor-plant-food Miracle-Gro Pump & Feed All Purpose Plant Food
  • Pump dispenser
  • Easy to Use
  • Ready to go
best-indoor-plant-food Origins Organic Plant Food
  • 100% organic
  • All natural ingredients
  • Large 500 ml concentrated bottle
best-indoor-plant-food Nature Safe Organic Plant Food
  • 100% organic
  • Contains seaweed
  • Large concentrated 1L bottle
best-indoor-plant-food Miracle-Gro Indoor Plant Food Spike
  • Solid-form fertiliser spikes
  • Long-lasting
  • Easy to apply
best-indoor-plant-food Baby Bio Orchid Drip Feeder
  • Specific for orchids
  • Drip feeds over a month
  • Doesn’t create a mess

Read Our Indoor Plant Food Reviews

B000TROMB2
0000050371280,5558768678672,0700465625519,5054203823473,3883854894240,3608526374833,5054251070775,5055942914224
Concentrated formula, A good all-rounder, Tried and trusted brand,

Baby Bio Fertiliser for Houseplants

best-indoor-plant-food Baby Bio Fertiliser for Houseplants
FEATURES RATING PRICE
FEATURES
  • Concentrated formula
  • A good all-rounder
  • Tried and trusted brand
RATING
99
PRICE
Save 50% on Amazon

Baby Bio Fertiliser for Houseplants Review

If you’re looking for the best indoor plant food that works as a good all-rounder, the Baby Bio Fertiliser for Houseplants is worth a look. Baby Bio is a trusted household brand that’s been around for over 60 years, consistently providing health-boost products for plants.

Baby Bio Fertiliser for houseplants contains 175 ml of plant food. Its a concentrated solution so comes in a small bottle that won’t take up much room. This also means that slightly less plastic is used for the bottle compared to a larger, diluted solution.

The concentrated solution needs to be mixed with water before being applied to plants. There are two methods for this. Either add 5-10 drops to half a litre of water and use it each time you water your plants, or add ½ capful to 1 litre of water and use it once a fortnight.

Having two ways to feed your plants is pretty useful, especially if you tend to forget and miss a few feeds. Using it every time you water means your plants will always be receiving a good balance of nutrients.

It contains a mix of the three main nutrient groups needed for healthy houseplants. These are nitrogen for better leaves, phosphorus for root strength and potassium for flowers and fruit. The Baby Bio Fertiliser has an NPK ratio of 10.6- 4.4- 1.7.

Be aware that you only require a few drops each time. It doesn’t seem like much so it can be easy to use more than necessary. This can result in overfeeding houseplants which should be avoided. Be sure to follow the directions to the letter because a little goes a long way.

The bottle lid can be tricky to undo too, especially when it gets crusty with leftover fertiliser. To combat this, give it a wipe round with a damp cloth before screwing the lid back on.

Overall, Baby Bio plant food is a good, reliable option. It gets consistently good reviews and is a dependable choice if you want to stick with something tried and trusted for the majority of common houseplants.

Pros

  • It’s concentrated so you only need a few drops from its small eco-friendly bottle
  • High nitrogen content helps with growth and forming strong, green leaves
  • Good value for money
  • It’s made by a well-respected brand

Cons

  • The few drops needed don’t feel like enough so there’s potential to overfeed
  • The cap can stick and need wiping down each time
B083KJP5YB
5010272188714
Pump dispenser, Easy to Use, Ready to go,

Miracle-Gro Pump & Feed All Purpose Plant Food

best-indoor-plant-food Miracle-Gro Pump & Feed All Purpose Plant Food
FEATURES RATING PRICE
FEATURES
  • Pump dispenser
  • Easy to Use
  • Ready to go
RATING
96
PRICE
Save 42% on Amazon

Miracle-Gro Pump & Feed All Purpose Plant Food Review

Feeding plants can get messy! If you want to keep things simple and clean then Miracle-Gro Pump & Feed All Purpose Plant Food is a good option to consider.

Because it uses a pump dispenser, Miracle-Gro Pump & Feed All Purpose Plant Food is quick and clean to use. You just apply one pump directly to plant soil and then thoroughly water it. This is a quick and easy way to feed your plants and also means you won’t accidentally overfeed if you’re prone to making mistakes with dilution rates.

One pump of plant food is needed for 9-11 inch pots, 2 pumps for 12-19 inches, and 3 pumps for pots 20 inch+. Therefore, it’s easy to figure out what your plant needs without measuring water and drops of fertiliser in a jug.

The ready-to-go formula and easy-apply pump are real timesavers, but one niggle is that the pump may sometimes mis-spray or break.

Some reviews report the hole can block causing the product to spray onto the plant’s foliage and burn it or stain the walls. Cleaning its nozzle after use to minimise blockages can help with this.

Overall, Miracle-Gro Pump & Feed All Purpose Plant Food is one of the best indoor plant foods if you want a quick and easy way to feed your houseplant with no measuring or messy mixing.

Pros

  • A pump dispenser means it’s easy to dispense the right amount onto your plants
  • The plant food is ready to go so there’s no messy measuring
  • You can add it directly to the soil and then water your plant as usual
  • It’s an all-purpose plant fertiliser for the majority of houseplants

Cons

  • The pump can sometimes block or misdirect the product and cause a mess
  • It can be difficult to hold and press if you have weak hands or arthritis
B0798HZSTR
5010272183405
100% organic, All natural ingredients, Large 500 ml concentrated bottle,

Origins Organic Plant Food

best-indoor-plant-food Origins Organic Plant Food
FEATURES RATING PRICE
FEATURES
  • 100% organic
  • All natural ingredients
  • Large 500 ml concentrated bottle
RATING
94
PRICE
Check Price on Amazon

Origins Organic Plant Food Review

Origins Organic Plant Food is one of the best indoor plant foods because it’s organic and contains additional natural ingredients to help plants flourish.

If you like to use natural organic products, Origins Organic is one of the best indoor plant foods to consider. It contains the key nutrients of nitrogen, phosphorus and potassium for good all-round plant health sourced from sugar beets and guano rock phosphorus – that’s aged bird droppings! The NPK ratio is 3-2-5.

It’s made from 100% natural ingredients, sourced from farmers and certified growers from the Organic Farmers & Growers Association. This is one of the UK’s leading organic certifiers so it has good organic credentials.

The bottle contains 500 ml of concentrated plant food so it needs diluting down before application. Dilute 10 ml to 1 L of water and feed as required. It’s a big bottle and a good choice for large pots and households with many plants.

Its natural ingredients mean it can be used on edible crops as well as indoor and outdoor plants, plus it’s pet and child friendly when used and stored correctly. This is good news for gardeners with families.

On the downside, it’s not 100% plant-based because it contains bird droppings, so if you’re looking for organic vegan plant food, this might not suit you.

Overall, Origins Organic Plant Food is a good choice for those of us trying to make organic choices, but who still want a product that works well. It contains the main ingredients needed to grow healthy crops in 100% natural organic form.

Pros

  • 100% certified organic ingredients
  • All-natural ingredients including aged bird droppings
  • Large 500 ml concentrated bottle will last a long time
  • Child and pet safe when it’s used in accordance with the instructions
  • Can be used on food crop plants

Cons

  • It’s not 100% plant-based so not a vegan choice
  • Care should be taken as it can stain floors and fabrics
B0852S18Y4
5390182210843
100% organic, Contains seaweed, Large concentrated 1L bottle,

Nature Safe Organic Plant Food

best-indoor-plant-food Nature Safe Organic Plant Food
FEATURES RATING PRICE
FEATURES
  • 100% organic
  • Contains seaweed
  • Large concentrated 1L bottle
RATING
90
PRICE
Save 13% on Amazon

Nature Safe Organic Plant Food Review

Seaweed is known as a plant superfood and Nature Safe Organic Plant Food contains seaweed and humics to boost the health of your houseplants.

Seaweed is a broad-spectrum fertiliser, containing trace minerals and carbohydrates that help stimulate plant growth. Seaweed breaks down quickly and doesn’t spread disease to land plants.

It’s also enriched with humics for root development. Humics are organic substances found in soil humus. This makes it especially suitable for gardens and houseplants in need of 100% chemical-free nutrients.

It’s a large concentrated bottle containing 1 L of plant food and you only need 30 ml fertiliser for every 5 L of water. The size of an average garden watering can is 5 L, meaning this fertiliser will go a long way on houseplants.

One gripe is that the fertiliser ratio isn’t displayed on the packaging so it’s not possible to see if it’s more beneficial to greenery, roots, or flowers. However, the inclusion of seaweed and humics will benefit the majority of plants.

Overall, this is one of the best indoor plant foods if you want something 100% natural and plant based. It’s worth consideration if you have lots of plants and want to use natural ingredients to keep them flourishing.

Pros

  • 100% organic and plant-based for a natural lifestyle
  • It contains beneficial seaweed to boost plants
  • Extra humics added for strong root development
  • Large concentrated 1L bottle
  • Can be used indoors and outside on flowers and vegetables

Cons

  • No NPK fertiliser ratio on the bottle
  • Reviewers say the cap gets crusty without a regular wipe down and won’t fit leading to spillages
  • It’s concentrated and requires diluting in water which can be more time consuming than other products
B000HAAOKY
0073561002523
Solid-form fertiliser spikes, Long-lasting, Easy to apply,

Miracle-Gro Indoor Plant Food Spike

best-indoor-plant-food Miracle-Gro Indoor Plant Food Spike
FEATURES RATING PRICE
FEATURES
  • Solid-form fertiliser spikes
  • Long-lasting
  • Easy to apply
RATING
86
PRICE
On sale at Amazon

Miracle-Gro Indoor Plant Food Spike Review

If you’re looking for a really simple and mess-free way to fertilise your houseplant then  Miracle-Gro Indoor Plant Food Spikes might suit you. It’s one of the best indoor plant foods in solid form that releases nutrients into the soil as it dissolves.

Miracle-Gro Indoor Plant Food Spike is what you might expect. It’s a spike of plant food! It weighs around 30g so it’s fairly lightweight and it’s small enough to fit into houseplant pots without destroying the root system.

There are 24 spikes in a pack and you need 2 spikes for 3-4 inch pots, 3 spikes for 5-6 inch pots, and so on. The spikes provide food for up to two months which is a helpful amount of time if you’re prone to forgetting or you have hungry plants that need continuous feeding.

The spikes fit inside a green plastic spike holder that gradually releases the plant food into the soil to feed all types of houseplants with a ratio of 6-12-6 NPK, so it can be used on the majority of houseplants safely.

On the downside, quite a few spikes need to be used at a time. So, although 24 in a packet sounds like a lot, you may find they’re used up long before a liquid concentrated plant food would be.

They also need to be snapped apart, so some of the product may end up on your fingers and there’s the potential to snap them in the wrong direction e.g breaking them in half.

Overall though, these spikes are one of the best indoor plant food options if you want something easy to use that will feed plants for up to two months. They’re ideal if you don’t want to mess around with liquid measurements as well. As a long-term, simple plant food, the Miracle-Gro Indoor Plant Food Spikes are definitely worth consideration.

Pros

  • The plant food spikes are a solid, no mess plant food
  • Spikes feed plants for up to two months, meaning you can water as normal
  • They’re specifically made for houseplant needs with a healthy fertiliser ratio
  • A plastic spike is included for no-mess applications

Cons

  • Large plants will need more spikes so the packet can be used up quickly
  • They can be messy to break and sometimes snap in the wrong direction
B00BGATHB6
5054203824159,0000050371433,5000371053280,5057065024927,5054480181402,5055942914194,5000371054461
Specific for orchids, Drip feeds over a month, Doesn’t create a mess,

Baby Bio Orchid Drip Feeder

best-indoor-plant-food Baby Bio Orchid Drip Feeder
FEATURES RATING PRICE
FEATURES
  • Specific for orchids
  • Drip feeds over a month
  • Doesn’t create a mess
RATING
81
PRICE
Check Price on Amazon

Baby Bio Orchid Drip Feeder Review

For orchid lovers, the Baby Bio Orchid Drip Feeder is a great option to consider. It’s one of the best plant foods specifically for orchids because it contains all the nutrients they need.

This is a pack of drip feeders so there’s no measuring out required. You shake the bottle, remove its tip with scissors, and place it upside down in the orchid’s roots. The bottle will take 3-4 weeks to empty.

This is a very convenient way to feed orchids, but on the downside, the bottles are conspicuous and show up against green leaves. Therefore, these orchid drop feeders can be a bit of an eyesore – but they’re great for orchid health! To make it worse, larger plants in a pot over 20 cm wide will need two feeders.

Another gripe is that the bottles are made from plastic with no indication of whether they are recyclable or not which is always frustrating.

Overall, Baby Bio Orchid Drip Feeder is a convenient way to feed orchids without the risk of overfeeding them or forgetting altogether. If you can cope with a plastic bottle in your orchid’s roots then it’s a good plant food to consider.

Pros

  • Automatically drip feeds fertiliser to orchid for up to four weeks
  • No measuring out is required so you can’t overfeed and poison your orchid
  • The bottles don’t create any mess and they’re very simple to use
  • It contains the nutrients specifically required by orchids
  • There are four in a pack so it's good value if you have lots of orchids

Cons

  • Contains a lot of plastic so it’s not environmentally friendly
  • Sometimes they won’t drip out their contents and remain full despite squeezing the bottle
  • Pink bottle is quite obvious when sticking out of the orchid pot

How to Choose the Best Indoor Plant Food

Indoor plants are limited by the compost in their pots, so it’s really important to water and feed them regularly. Healthy plants need regular fertiliser in the growing season to look their best.

Here’s how to choose the best indoor plant food

Look For a General Purpose Fertiliser

For the majority of leafy and flowering indoor plants, a general-purpose fertiliser will do a good job. Exceptions are orchids, cacti and herbs who tend to thrive in poorer conditions and need less fertiliser than a peace lily for example.

A good general-purpose plant food will contain the following nutrients:

Nitrogen (N): good for leafy growth

Phosphorus (P): to strengthen roots

Potassium (K): to boost flowers and fruits

If your general-purpose fertiliser includes all three of these basic nutrients it’ll do a good job. Other ingredients such as clay or limescale are included to prevent chemical burns on the roots.

What Do The Numbers Mean On Indoor Plant Food?

Fertiliser numbers are ratios that indicate how much of each nutrient is included.

6-12-6 for example indicates 6% nitrogen, 12% phosphorus, and 6% potassium.

Indoor fruits such as tomatoes will have a higher percentage of potassium (sometimes called potash) which should be applied when the flowers appear to boost fruit production.

A general-purpose indoor plant food will have a roughly equal amount, but sometimes there will be more phosphorus to boost root growth, or nitrogen to help with leafy growth.

Do I Need A Specific Plant Food?

Many companies offer specific fertiliser for certain plants. Orchids for example need much less food than leafy greenery so specific orchid foods are available to help growers out. The same goes for citrus plants, cacti – who need barely any fertiliser – and herbs.

If you’re growing crops, like indoor tomatoes, that you intend to eat, make sure the fertiliser is suitable for this. You’ll want to look for an organic or plant-based fertiliser that is suitable for use with edible crops.

Is Liquid or Granular or Solid Plant Food Best?

Plant food is available in several different forms. They all work effectively, it just depends which type will best suit you and your plant-feeding routine.

If you don’t want to think about adding fertiliser every time you water your plants, a solid or granular formula may be most suitable. These are generally long lasting and they release nutrients slowly. As a result, you can water as normal once they’re in place. You just need to remember when to reapply them – it can be easy to forget when you only have to do this every two months or so.

Liquid plant foods usually need weekly or fortnightly applications, which will probably fit in well with your existing watering schedule. This is a good way to apply plant food if you feel like a regular routine will suit you best.

Liquid fertilisers are generally fast-acting too, so if your plant is looking a bit unwell, liquid plant will be your best option to help it recover. Just don’t go overboard – only ever use the recommended amount, as too much will poison your plant.

If you’re still wondering what’s best, our FAQs below might help.

Indoor Plant Food FAQs

What is the best food for potted plants?

Leafy green houseplants usually benefit from general-purpose houseplant food in liquid, granular or solid form. A slightly higher amount of nitrogen can give a boost to leaves, so this might be a good choice if they’re going yellow.

As we’ve already mentioned, certain plants will have different food requirements. For example, if it’s an orchid, herb or citrus plant, you should consider a plant food that is intended for the specific species.

Be sure to follow all fertiliser instructions carefully and avoid getting fertiliser on foliage – this will burn and leave scorch marks.

Are coffee grounds good for houseplants?

No, coffee grounds don’t add anything useful to houseplant soil other than bulking it up for more root space. If you want your plant to thrive, a plant food with nitrogen, phosphorus and potassium in the correct ratio is your best bet.

If in doubt, choose a general-purpose indoor plant food.

How often should I fertilise indoor plants?

Plants only need fertiliser in the growing season which is most often spring to summer. This is because they tend to go dormant in the winter months, although there are some exceptions like orchids!

How often you should feed your plants is directed on the plant food packaging. Liquid forms are usually required every one-to-two weeks, whereas granular and solid food lasts for several months. You can also buy drip feed and slow-release plant foods that last 3 months.

Be careful not to over-feed your houseplants. Overfeeding creates yellow leaves and most often your plant won’t recover. Mark feeding day on the calendar, or set an alarm, and stick to the routine!

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