Nutrients are the foundation of any indoor feeding programme, supplying plants with the essential elements they need for healthy growth, strong roots and productive flowering. Whether you are growing in coco, soil or hydroponics, choosing the right nutrients helps plants perform consistently throughout the full growing cycle.

At Acorn Horticulture, we supply indoor plant nutrients in the UK for growers using coco, soil and hydroponic systems. Whether you are building a simple feed programme or combining nutrients with growth boosters, bloom boosters and pH management products, the right nutrient range is essential for healthy indoor plant growth.

ecothrive Neutralise

Price range: £6.00 through £60.00 incl. Vat
Select options This product has multiple variants. The options may be chosen on the product page

Neutralises Chlorine and Chloramine Instantly

Just a few drops of Neutralise and your tap water is ready for adding microbial products such as Biosys. It can also be used with soil, coco and hydroponic systems as a pre-treatment for irrigation water and nutrient solutions.

Neutralise has been formulated to actively target the presence of chlorine and chloramine in tap water. Chlorine and chloramine are powerful disinfectants that are added to water supplies throughout the UK to kill potentially harmful bacteria. No doubt you will have smelt chlorine when running the tap or having a shower.

Chlorine alone in tap water can create some unwanted harmful by-products so water companies are moving towards a more stable version of chlorine known as chloramine. The procedure involves mixing ammonia into chlorinated water. Chloramine is far more persistent than chlorine alone, making it more effective at killing bacteria right to the point of drinking your glass of tap water, or watering your plants.

GHE Ripen

Price range: £6.50 through £29.00 incl. Vat
Select options This product has multiple variants. The options may be chosen on the product page

Ripen is a late flowering solution that is also known as a 'forcing solution' in the greenhouse industry. Will give you enhanced flowering size and yield.

Ripen acts at different levels: - It gives the plant a strong signal that it is coming to the end of its life. The plant reacts by speeding the ripening process, in a last effort to spread its genes. - It brings to the plants all the mineral salts they need in a form easy to assimilate. - In case of a previous accumulation of nitrate or microelements, it helps metabolise these residues, which will improve the taste of the crop. - In case of a severe infestation of fungi or insects, it allows you to accelerate the natural cycle and get something out of a crop otherwise completely lost.

Canna D-Block 1 Litre

£26.00 incl. Vat

CANNA D-Block

CANNA D-Block is an organic product based on anionic detergents. It cleans and prevents obstructions in drip and spraying systems during cultivation. It also prevents the build-up of precipitant.

Use CANNA D-Block pre-emptively with every irrigation (the product is completely non-toxic) and make sure that the pipes and dripper remain wet internally between irrigations.

Before every new crop, it is advisable to fill the system with clean water and D-Block (with an adjusted pH of 5.2) to protect the system and prevent any obstructions during the next cultivation.

Canna Spanner

£4.00 incl. Vat

This is a handy spanner for opening 5 or 10 Litre nutrient drums. It is almost impossible to open your large Canna Nutrient Drums with out this handy spanner. Also opens other makes of nutrients eg IONIC

What Are Plant Nutrients?

Plant nutrients are the products used to feed indoor plants throughout the growing cycle. They provide the essential elements plants need for root development, leaf growth, stem strength and flowering performance.

In indoor growing, plants rely on the grower to provide a balanced feeding programme, which makes nutrients one of the most important parts of any successful setup.

Why Nutrients Are Important

Nutrients play a central role in plant health and performance. Without the right feed, plants can struggle to grow properly and may show signs of deficiency, weakness or reduced development.

  • Supports healthy root growth and plant structure
  • Helps maintain vigorous vegetative development
  • Supports flowering and final plant performance
  • Works across coco, soil and hydroponic systems
  • Forms the foundation of a complete feed programme

Choosing the right nutrients and using them consistently helps create a healthier and more productive indoor grow.

Types of Nutrients for Indoor Growing

Indoor plant nutrients are usually used in stages depending on the plant’s growth cycle and feeding needs.

  • Base nutrients – the main feed used throughout the growing cycle
  • Vegetative nutrients – used to support leaf, stem and root development
  • Flowering nutrients – used later in the cycle to support bloom development
  • Specialist support products – used to support water quality, system cleaning or late-stage feeding

This category also includes practical feeding and nutrient support products that help keep indoor systems running smoothly. The current range includes products for water treatment, ripening support and irrigation system maintenance. :contentReference[oaicite:1]{index=1}

Nutrients and Different Growing Media

Different growing media require different feeding approaches, which is why nutrient choice matters so much in indoor growing.

  • Coco – often needs regular and closely managed feeding
  • Soil – usually more forgiving, but still benefits from a balanced nutrient programme
  • Hydroponic systems – require accurate nutrient mixing and regular monitoring

Matching your nutrients to the growing medium helps improve nutrient uptake and overall plant health.

Nutrients and Feeding Programmes

Nutrients are typically used alongside other products to build a more complete feeding strategy. Common companion categories include:

Together, these products help growers build a more effective and better-controlled indoor feeding routine.

Nutrients, pH and System Maintenance

Good feeding is about more than just adding nutrients. Indoor growers also need to think about pH, water quality and keeping irrigation systems clean and reliable.

This is why many growers use measuring tools to monitor pH and EC, and choose support products that help prepare water, maintain clean irrigation lines and improve nutrient balance. Several of the products currently in this category specifically support chlorine removal, late-stage ripening and prevention of irrigation blockages. :contentReference[oaicite:2]{index=2}

Who Are These Nutrients Best For?

This category is useful for indoor growers who want the core products needed to build or support a practical feeding routine. It suits beginners looking for essentials as well as experienced growers who want targeted products for water preparation, late-stage support or system maintenance.

Whether you are running a hand-watered setup or a more technical hydroponic system, nutrients remain the backbone of plant performance.

Helpful Guides for Plant Nutrition

If you want to learn more about nutrients and feeding, explore our guides:

These guides will help you understand how nutrients fit into a balanced indoor growing programme and how to get better results from your setup.

Shop Indoor Plant Nutrients in the UK

At Acorn Horticulture, we stock nutrients and nutrient support products for indoor growers across the UK. Whether you need everyday feed essentials, late-stage support or products to help maintain water and irrigation quality, our range is designed to help you build a healthier and more reliable indoor feeding system.

Browse our full range above to find the right nutrients for your setup.

FAQs

What are plant nutrients used for?

Plant nutrients provide the essential elements needed for healthy root growth, vegetative development and flowering performance in indoor growing systems.

Do I need different nutrients for coco, soil and hydroponics?

Yes, different growing media often benefit from different feeding approaches, so it is important to choose nutrients that suit your setup.

Are nutrients the same as boosters?

No, nutrients are the core feed, while boosters are usually additives used to support specific stages such as vegetative growth or flowering.

Why should I monitor pH when using nutrients?

pH affects nutrient uptake, so even a good feeding programme can underperform if the solution is out of balance.