Start now and grow legendary!

Growing and achieving your goals means falling, getting back up and challenging yourself. Whatever you come across along the way, you can rely on us. Whenever you need us, we will be there. We will give you the help and support you need to grow legendary. 

24/7 support

We will do our best to give you the support you need. All day, every day. It doesn’t matter if your goal is to achieve the highest yield, to grow fully organic or to get the best smell and taste of your end products. Our Grow Experts are widely experienced in growing and have broad knowledge of plants. You’ll always get advice tailored to your situation. Reach them at our Servicedesk or through social messenger. Would you rather get advice in person? We’ll be at several tradeshows this year. You can recognize the Plagron crew by their white shirts and green hoodies. 

How we’ll make sure that you get the support you need

Our complete team of experts is ready to give you the full support you need. We’ve got different departments ready to take care of all your needs. Our Research and Development team maintains the high product quality that you’ve come to expect from us. Besides performing quality control, they optimize existing products and create new products for all kinds of growers. Our Supply Chain team takes care of the production and shipment of your products. This hard working team is ready to do whatever it takes to make our products available to you. To ensure these shipments pass the borders, our Registrations office takes care of correct certificates and papers. Last but not least our Grow Experts will give you full support on all your grow issues. 

Become a grow legend

Need help with growing the best strain, creating the perfect nutrient solution or harvesting the fattest crop? We listen to your needs, so you can achieve legendary results and become a grow legend. Need more support or got any suggestions? Get in touch with us and share your ideas! 

Don’t forget to share your legendary results on your social channels with #growlegendary !


What is 420?

Happy 420! You all know the term, but do you also know where it comes from? Time for a little history lesson!

There’s a lot of confusion about how the term 420 originated. Let’s take a look at some of the fake stories first. Don’t worry, we’ll get to the real one soon enough!

Funny but untrue

One of the most common misconceptions is that it’s the police code for marijuana. It’s actually the code for murder in some states! 420 is also not the birthday (or date of death) of Bob Marley, not the number of chemical compounds in cannabis, and not the best day of the year to plant your cannabis plants.

One farfetched story states that Bob Dylan’s 1966 Rainy Day Woman #12 and 35, in which he famously states that “everybody must get stoned” is the origin of the term. After all, 12 times 35 equals 420! Creative, but unfortunately not true. And lastly, one of our favourites: 4:20 PM is teatime in the Netherlands. As a Dutch company, you can trust us when we tell you there’s definitely no such thing!

The real story

The real story of how the term 420 began is that of a treasure hunt. In 1971 in San Rafael, California, five high schoolers calling themselves the Waldos set out to find a fabled unattended guerrilla grow. Each day, they would meet at 4:20 PM under a statue of Louis Pasteur. 4:20 Louis soon became their code word for the treasure hunt. “Louis” eventually got dropped (and the guerrilla grow was never found), but the catchphrase 420 stuck around and quickly became a term to describe all things weed-related.

One of the Waldos eventually ended up as a roadie for the Grateful Dead, the pot-friendly jamrockers. The band’s fans quickly picked up on the term, spreading it across the globe. Then, in 1991, High Times magazine started coining the term. Within a couple of years, they had helped spread the phrase worldwide, creating a catchphrase for marijuana users everywhere.

A global phenomenon

Slowly, the catchphrase also found its way into pop culture. This is why, for instance, most clocks in Pulp Fiction (and all Lost in Translation) are set to 4:20 and why the scoreboard in Fast Times at Ridgemont High reads 42-0. There’s also a Family Guy episode called 420, in which the characters attempt to legalize marijuana. Speaking of legalization:, the bill to legalize marijuana in California was called Bill 420. And finally, in the most 420 thing to ever happen, Snoop Dogg and Willie Nelson recorded a song in Amsterdam on 4/20/2009. The title? Roll me up and smoke me (When I’m gone).

Please always obey your local laws and regulations. We do not endorse illegal activities.


Terra Grow and Terra Bloom: even better in 2023! 

Our Terra Grow and Terra Bloom are ready for the future! We’ve updated their recipe based on new insights from our R&D department. With this new version, your plants will show even better results!

Empowering you is our main goal, which is why we’re constantly looking to improve our products and service. That’s why from now on, we’re adding the trace elements in Terra Grow and Bloom in chelated form. There’s a number of advantages to this. Firstly, chelated elements are better absorbable by your plants. They’re also less dependent on the pH value, so growing becomes easier for you. Finally, chelates are very mobile within plants. This means deficiencies are less likely to occur, since nutrients will reach affected areas quicker. 

Another thing we’ve changed is the ratio of trace elements. Based on theoretical and practical research, we’ve updated the exact composition of Terra Grow and Terra Bloom to help prevent deficiencies and to optimize photosynthesis. 

You can find the new version of Terra Grow and Bloom online and in your local shop right now. Still got an open bottle? Don’t worry, it also gets the job done just fine! 


Soft water? Use CalMag Pro!

We have created Plagron CalMag Pro for the grower who wants to give extra calcium (Ca) and magnesium (Mg) to his plants.


Why would you want Plagron CalMag Pro?

Calcium and magnesium are two of the essential elements that play an important role in cell production and in the process of photosynthesis (converting carbon dioxide and water into glucose). This photosynthesis process is vital for your plant. Magnesium is a building block for chlorophyll, which is an elemental part of this process. The addition of calcium strengthens cell walls, improves root development and nutrient absorption. It increases your plant’s overall resistance. This makes Plagron CalMag Pro of added value.

When do you use Plagron CalMag Pro?

Water does not have the same concentration of minerals all over the world. When your water is low in calcium and magnesium, it could also be called soft water. Hard water, on the other hand, contains a lot of calcium and magnesium. In the case of soft water, CalMag Pro is a highly desirable supplement to your nutrition. If you grow with rainwater or RO (Reverse Osmosis) water/reverse osmosis water (demineralised water from a filter system), chances are that the calcium and magnesium ratio is too low as well. Plagron CalMag Pro to the rescue! Last but not least, CalMag Pro can be used when growing under LED light to compensate for the reduced calcium absorption this entails.

Under what growing conditions can you use Plagron CalMag Pro?

  • CalMag Pro can be used on all substrates.
  • CalMag Pro can be used for both indoor and outdoor cultivation.
  • CalMag Pro is compatible with all growing schedules.
  • CalMag Pro is suitable for both the grow and flowering phase.
  • CalMag Pro can be used with any watering system.


Clean products with the RHP and CU certification

We value quality. Because it’s easy to say this, we like to actually provide proof of this as well. That’s why many of our products are certified in some way. We work with different certifications to measure our quality standard.

RHP certification

Since 1963, RHP has been the European knowledge center for substrates. With their own RHP quality mark, RHP guarantees clean, safe and qualitative products. If you use a RHP-certified quality mark, you care for an optimal start of your grow. Because with substrates with the RHP-quality mark, you are always assured of a certain quality.

What do we mean by quality in this case?

Think of degree of water absorption, air content, pH- and EC-value and present nutrients. Besides, with RHP certified substrates you have more certainty that your substrate is clean and can be applied safely, without risks for your grow. The RHP quality mark analyzes the complete route a substrate travels for you, from raw material to processing to delivery of the final product.

CU certification

Organic farming is a trend that is gaining popularity in society nowadays. Organic farming involves cultivation that respects the natural life cycle and minimizes human impact on the environment. The Control Union Certifications foundation (part of the Control Union World Group) monitors on a global scale whether products may be classified as organic.

What does CU-certified stand for?  

A product certified by Control Union Certifications, doesn’t contain genetically modified organisms (GMOs). In genetically modified crops, the crop’s DNA has been modified, using genes with positive properties from for example bacteria or plants. This can give plants special properties. Think of potatoes that are resistant to the potato disease phytophthora, tomatoes that have a longer shelf life, and corn that is more resistant to caterpillar pests. The Control Union Certifications Foundation inspects and certifies the entire chain of a product. When they determine that all requirements have been met, and thus no GMOs have been used, they issue the CU certificate. This guarantees that the product you’re eventually holding is organic.


Plagron R&D: Where the magic happens

Our in-house R&D department is where the magic happens. It’s where we make sure your product is always of the absolute highest quality. Where we develop new recipes, products and solutions that you’ve asked for – or didn’t even know you wanted.

Quality and control

It’s not just our in-house R&D department that makes sure our products are always of perfect quality. They work in tandem with our registration department, which is also located at our HQ in Ospel. Together, they ensure all our products meet all the highest worldwide quality and safety standards. We carefully guard the information on the labels as well, making sure it always matches local laws and regulations.

Every single batch of raw materials is checked meticulously for deviations before it’s cleared for use in production. Of course, the same goes for every single product batch that leaves our HQ. If you’re ever unsure about product quality, don’t hesitate to contact us. We’ll check your batch code against the batch sample we’ve got in storage and can tell you what’s what within hours.

Upgrades and innovation

Our grow experts and account managers keep an ear to the ground and know what you, the customer, want. Combine that with all the trends and developments that our R&D department keeps an eye on, and you’ve got a solid base for continuous improvement. And there’s a lot of different ways to improve.

First and foremost, R&D develops new products that we know you want. These developments start as a little seed, an idea. We then let this idea germinate and enter the grow phase. This is when we try different formulas to find one that works in an optimal, safe and cost-effective way. Next: the flowering phase. The time has come to test all our different formulas in our in-house grow room. We carefully check their effects, their optimal use and how they cooperate with our other products. Eventually, we settle on a definitive version of our brand-new product. Time for everyone’s favourite part of growing: seeing others enjoy your harvest.

But that’s not all that happens in our grow room. We also continuously run tests with updated formulas. Sometimes, a small change can mean much better results. Other times, there’s a way to make a product more efficient and more cost-effective to use. And of course, we find a way for our products to work together even better – just take a look at what our best buds Green Sensation and Sugar Royal can do when combined.

Now, this is not something we do alone. We work together with partners like research centres, think tanks, universities and branch organisations both foreign and domestic. This way, we can always back up our promises with peer reviews.


Best organic nutrients – as voted by you

There’s nothing we value more than the opinion of you, the passionate grower. That’s why it makes us extra proud to announce that our organic nutrients won this year’s GrowDiaries awards. You also voted for us as the runner up for best nutrients brand overall. Thank you so much!

As you know, our end goal is helping you achieve legendary results. We’re very happy to see that so many of you are already making this happen with our organic products. Want to find out for yourself why so many growers voted for these products? Just look for the CU logo on our bottles and cans. All products with this logo are certified organic. Many of our additives, like Green Sensation, also show great effects when combined with our organic base nutrients Alga Grow and Alga Bloom. These additives also won’t harm the soil life. There’s a reason why we also came second best overall!