Filter By

1265 products

Fertilizers and additives for hydroponic, soil and coco cultivation

Welcome to our section dedicated to fertilizers and additives for all your crops, whether you're into hydroponics, soil or coco substrates. At Culture Indoorwe offer you a complete catalog of the best fertilizer brands, selected for their performance, reliability and compatibility with all types of crops, indoors and out.

For all types of substrates: soil, coco, hydro

  • Soilfertilizers: to nourish your plants efficiently throughout the cycle.
  • Fertilizers for coco fiber: designed to optimize absorption in this light, draining substrate.
  • Fertilizers for hydroponic systems: pure, soluble and stable mineral formulations, ideal for NFT, DWC, drip and aeroponic systems.

Whether you're growing vegetables, herbs, fruit or ornamental plants, you'll find the right nutrient solution.

Nutrients for every growing phase

  • Grow: development of roots, stems and foliage.
  • Bloom: flower formation, fruit and aroma stimulation.
  • Boosters and stimulators: rhizogens, enzymes, flowering stimulators, PK boosters, etc.
  • Organic and mineral supplements: humic/fulvic acids, silica, calcium, magnesium, etc

Top brands available

Our selection includes the European and international leaders in plant nutrition:

Canna, Plagron, Biobizz, Atami, Hesiterra Aquatica (ex GHE), Grotek, Gold Label, Hydropassion, VG Garden, Aptus Holland, Vaalserberg Garden, House & Garden, BioTabs, Growth Technology, Or Brun, Platinium Nutrients, and many others.

You'll find the most popular products: Green Sensation from Plagron bloombastic fromAtami rhizotonic, Cannazym, PK 13/14, Terra Vega/Flores, Aqua Vega/Flores de Canna organic Grow & Bloom de Platinium Nutrients, Root Riot, Humic & Fulvic Booster, and all specific additives.

Why buy your fertilizers from Culture Indoor ?

  • Competitive prices on the entire catalog
  • Availability online and in over 130 stores
  • Professional advice, both in store and on our website
  • Certified organic, organo-mineral or 100% mineral ranges, according to your preferences

Watch our videos on YouTube

Want to find out more about our fertilizers and additives? Follow us on our YouTube channel Culture Indoorchannel, where we share instructional videos to guide you in product selection, dosage and application. Our experts present the best brands, compare ranges and explain how to optimize every stage of your crop.

> See the playlist dedicated to fertilizers and additives on YouTube

FAQ - All you need to know about fertilizers and crop additives

What's the difference between a fertilizer and an additive?

A fertilizer provides the basic nutrients (nitrogen, phosphorus, potassium) needed for growth and flowering. An additive supplements nutrition with secondary elements (calcium, magnesium, trace elements) or stimulates certain processes such as rooting, flowering or nutrient absorption.

Can I mix several fertilizers or additives?

Yes, but it's essential to respect the dosages recommended by the manufacturers. Many brands offer completecultivation diagrams to help you avoid overdosing and combine their products effectively.

Which fertilizer should I choose for hydroponics?

For hydroponics, choose fully soluble mineral fertilizers, such as those from Canna Aqua, Terra Aquatica, Atamior Hydropassion. They guarantee pH stability and rapid absorption.

Can organic fertilizers be used indoors?

Yes, organic fertilizers such as Biobizz, Plagron Alga or BioTabs are perfectly suited to indoor cultivation. They simply require a little extra care to avoid excess humidity and encourage microbial activity.

Should I change fertilizers between growth and flowering?

Absolutely. Plants have different needs depending on their stage: a Grow fertilizer stimulates the development of stems and roots, while a Bloom fertilizer encourages the production of flowers and fruit.

In a nutshell

  • Europe's widest choice of fertilizers and additives
  • Solutions for all types of crops and substrates
  • Formulas adapted to each stage of the plant cycle
  • The most reputable brands on the horticultural market

Offer your plants targeted, high-performance nutrition with our selection ofprofessional fertilizers and additives.

Culture Indoorwe've been your partner in crop growth for over 20 years.