FREE shipping in NL from € 20,- Delivery in EU within 1-3 working days* Discrete packaging
Our site uses cookies. By continuing to use our site you are agreeing to our privacy and cookie policy.
I understand
World's best assorted online smart shop
spacemileshop icon Spacemiles - Collect discount - More info
Fertilizer Refine your choice
Brands Choose your favorite

Cannabis Fertilizer

In the world of cannabis cultivation, understanding and providing your plants with the right nutrition are essential for a healthy and robust growth. Just as a skilled chef knows the importance of quality ingredients, a successful cannabis grower knows the vital role of using premium cannabis fertilizer. At Sirius, we are dedicated to offering top-tier fertilizer for cannabis that ensures your plants thrive, giving you the full spectrum of their unique flavors and aromas.

More
Our brands Show all brands
Air-Pot
This brand has no products within the filtering
More information
AutoPot
This brand has no products within the filtering
More information
BAC More information
DrFertigo More information
Elektrox
This brand has no products within the filtering
More information
Green House Feeding More information
LUMii Lighting
This brand has no products within the filtering
More information
Method Seven
This brand has no products within the filtering
More information
SANlight
This brand has no products within the filtering
More information
Spongepot
This brand has no products within the filtering
More information
Unbranded
This brand has no products within the filtering
More information
Homebox
This brand has no products within the filtering
More information
Royal Queen Seeds More information
California Lightworks
This brand has no products within the filtering
More information
Growers Choice More information
G.I.B.
This brand has no products within the filtering
More information
Ventilution
This brand has no products within the filtering
More information
Biotabs More information
Bluelab More information
Bio Nova More information
Adwa Instruments
This brand has no products within the filtering
More information
General Hydroponics
This brand has no products within the filtering
More information
All brands
Germination Grow tents Lighting Climate Fertilizer Grow guides Miscellaneous
All filters
43 products
Sort by:
Green House Feeding

BioGrow

NPK: 7-2-4
from € 7,25   Student Discount Collect 1 Spacemiles
In stock Ordered before 16:00, delivered tomorrow
Please choose an option.

The importance of using weed nutrients for your soil health

A healthy soil is the foundation of any successful cannabis garden. It's a living ecosystem, rich in organic matter and microorganisms that work in harmony to provide the necessary support for cannabis plants. Therefore, most growers are looking for the best nutrients for cannabis. The right soil composition not only supports the physical structure of the plant but also significantly influences its terpene profile, enhancing the flavors and aromas that weed connoisseurs love. For any plants it is important to take good care of the soil life, the plant will do the rest, particularly in the context of cannabis cultivation.

Optimal cannabis fertilizer: the key to great growth

The choice of your fertilizer for cannabis is an aspect to consider when starting the cultivation of cannabis. It's not just about feeding the plant a high amount of diverse nutrients; but it's about maintaining an ecological balance and ensuring that the nutrients are delivered in a form that's easily accessible to the plant. Our webshop at Sirius offers a wide range of natural cannabis fertilizer, bio-starters, bio-boosters, and soil improvers, dedicated to the unique nutritional needs of cannabis plants. These organic fertilizers are available in various forms, including tablets, liquid, or powder, allowing cultivators the flexibility to choose the best fit for their garden. Brands like Biotabs, BAC, and DrFertigo are renowned for their quality and efficacy among home growers and in the industry.

Understanding cannabis fertilizers: NPK and (much) more

Cannabis nutrients are often categorized by their NPK ratio - nitrogen (N), phosphorus (P), and potassium (K). These are the primary macronutrients required by the plant. Nitrogen, Phosphorus and Potassium are crucial elements for plant growth, root and flower development, and logically the overall health and disease resistance of your crops. However, the best nutrients for cannabis extend beyond NPK. Micronutrients like calcium, magnesium, and iron play significant roles in ensuring balanced growth and preventing nutrient deficiencies. This is why many cannabis fertilizer brands use complex proprietary weed nutrient mixes that provide everything you plants need. 

The role of weed fertilizer and weed nutrients

Using quality organic weed nutrients is not just about boosting growth; it’s about improving the quality of the final product. Proper nutrition leads to robust plants with dense, resinous flowers, rich in various cannabinoids and terpenes. This directly translates into a more potent and aromatic end product, which is a key marker of quality in the stoners and the cannabis growing community. Products such as the Growers Choice Organic grow kit or the Biotabs Guerrilla are weed fertilizer choices for growers aiming for targeted nutrition to improve the quality of their cannabis plants​​.

Organic vs. Synthetic: Choosing the right cannabis fertilizer

In the world of cannabis fertilizer, the difference between using organic or synthetic nutrients is sometimes at the origin of heated debates. Organic cannabis fertilizers, like those available in our Sirius webshop, are derived from natural sources and are free from artificial chemical additives and pesticides. They not only feed the plant but also contribute to the long-term health of the soil. Synthetic cannabis fertilizer, on the other hand, can provide your plants with more potent nutrients, which can yield even better results, but sometimes at the expense of soil health and the environment if they are not used properly. The choice depends on the grower’s philosophy, the desired end product, and environmental considerations.

Use the right weed nutrients for the different growth stages

Using the right weed nutrients at different stages of growth is crucial for the optimal development of your plants. During the vegetative stage, weed nutrients with a higher nitrogen content are often considered beneficial by growers, as it can support the leaf and stem growth.  As the plant transitions to the flowering stage, many home growers agree that weed nutrients with phosphorus and potassium become more important, facilitating the development of buds. Our wide range of weed nutrients and cannabis fertilizers greatly satisfy these varying needs, ensuring that your plants receive the right balance at every stage. To help you make the best choice for your plants, many weed fertilizer brands include on their packages the ratio of these nutrients (N-P-K). A general guideline is that weed nutrients for the vegetative stage should have high nitrogen, low phosphorus, and moderate potassium (e.g., 9-4-5), while for the flowering stage, the focus should shift towards higher phosphorus and potassium (e.g., 3-8-7)

Get premium weed fertilizer for cannabis at Sirius.nl

If you want to cultivate premium cannabis, then you are at the right place! Get the best quality of fertilizer for cannabis on Sirius.nl  Explore our extensive range of organic cannabis fertilizers and nutrients at Sirius, and embark on a journey to grow cannabis that not only thrives but also provides an exceptional sensory experience. Remember, a well-nourished cannabis plant is the foundation of quality in both cultivation and smoke. For more information and assistance to help you choose the best nutrients for cannabis for your plant,  you can contact our customer service, we will happily help you find the best weed fertilizer!

Loading Please wait...
Follow us:
FREE shipping in NL from € 20,- Delivery in EU within 1-3 working days* Always a free gift with your order
Worlds best assorted online smartshop Excellent
4.9
Based on 5.797 reviews
Are you 18 years or older?

Please take into account the legislation of the country to which you want your orders to be sent. Our webshop is subject to Dutch law.

By clicking Continue, you confirm that you are 18 years of age or older and that you have taken note of and agree to our warning regarding applicable legislation.

Continue Leave
Follow us:

Our physical Sirius Smart Shops are also OPEN

in Roermond NL Hamstraat 15 
and Maastricht NL Oude Tweebergenpoort 7A
and Venlo NL Kleine Beekstraat 5 

How would you like to receive the order? Make your choice below
Please choose how you would like to receive your order
Please choose a country for delivery
Select your country:
Why are we asking this?

Unfortunately, it is not possible to send our entire range to all countries. However, it is sometimes possible to send products in different packages.

Please choose a shop
Choose a shop:
Continue
This choice can always be adjusted in the shopping cart.
You are using an old browser. We therefore cannot guarantee that the website will function properly. Update your browser or use a different one for a better user experience.