FAQ

By clicking on the dropdown menu you will find all the answers to the frequent asked questions sorted in the following categories: delivery, masterblend nutrients, hydroponics, and sales.

Below an overview of all the questions is provided.

Delivery

How long will it take to receive my order?

The amount of time that it takes to receive the order depends on the country you are located in. After shipment, we give the following indication for different locations:

How long will it take to receive my order?

The amount of time that it takes to receive the order depends on the country you are located in. After shipment, we give the following indication for different locations:

TimeDestination
1 dayBelgium, and The Netherlands.
2 – 3 days Austria, Belgium, Czech Republic, Denmark, France, Germany, Hungary, Luxembourg, The Netherlands, and Poland.
3 – 7 daysAll of the European Union + United Kingdom. This includes: Bulgaria, Croatia, Estonia, Finland, Greece, Italy, Ireland, Latvia, Lithuania, Portugal, Romania, Slovakia, Slovenia, Spain, and Sweden.
1 – 2 weeks All European locations outside of the EU. This Includes: Norway, Balkans and more remote areas such as: Canary Islands, Madeira, Azores, Greek Islands.
2 – 4 weeksWorldwide destinations, delivery time is very dependent on the carrier

Do you ship to my country?

The answer is almost always yes, we provide packages with custom forms so they can be processed by the local customs department.

What carriers do you use for shipping?

Within the European Union, we use mostly DPD and sometimes PostNL where PostNL is working with local carriers in your home country through the global mail system. Outside of the European Union, we use PostNL.

Do you provide pick-up points where I can pick up my order?

At Hydroponics Europe we feel that it is the best service to our customers to ship the package to your home address. In some countries, delivery to a pick-up parcel shop is one of the options but since we have such a great variety of destinations, we cannot offer this as a standard.

What are the shipping costs?

At Hydroponics Europe we aim to keep things as simple and transparent as possible. This is why we have included the shipping prices in orders to all of the following countries which means that the shipping is free to these destinations:

Destination
0.75 and 1.5 kg packages 4 kg packages 8 kg packages 11.3 kg / 25lbs Bag of Masterblend 28.25 kg package
Austria, Belgium, Czech Republic, Denmark, France, Germany, Hungary, Luxembourg, The Netherlands, and Poland.FREEFREEFREEFREEFREE
Croatia, Bulgaria, Estonia, Finland, Greece, Ireland, Italy, Latvia, Lithuania, Malta, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, and The United Kingdom.

€ 5,-
€ 9,50,- € 9,50,- € 11,- € 21,-
Albania, Belarus, Bosnia, Iceland, Moldova, Montenegro, North-Macedonia, Norway, Serbia, Switzerland, Turkey, Ukraine, and Greenland.€ 5,- € 17,- € 24,- € 30,- € 68,-
Other parts of the world.€ 15,-
€ 44,- € 75,- € 104,- € 240,-
Shipping costs.

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Masterblend nutrients

How often do I need to add the nutrients?

How often you should add nutrients depends on the plant you are growing and how long it takes for them to take up the nutrients. The main mixing instructions can be read when clicking the following link: Mixing Instructions.

Do the nutrients expire?

The nutrients that we sell do not expire when stored properly. This means that the nutrients should be stored in a cool and dark space and the bag they come in needs to be closed from the air when stored. Storing the product for a longer period of time will not decrease the quality of the nutrients.

How should I store the product?

The product should be stored in a cool, dark and airtight place. Some nutrients like Calcium nitrate are hydrophilic so they attract moisture, therefore, being in contact with open air and humidity should be prevented. Therefore, it is important to close the bag with the nutrients properly or store the product in an airtight box.

Do you sell Masterblend 4-18-38 Tomato formula?

Yes. Link: Masterblend 4-18-38 Hydroponic Fertilizer | 25 lbs / 11.3 kg

Do you sell Masterblend 8-15-36 Lettuce formula?

At the moment we do not have the 8-15-36 Lettuce formula. In order to grow lettuce our 4-18-38 is very well suited if used according to the leafy greens recipe provided in the Mixing Instructions.

Do you sell Masterblend 9-12-34 Strawberry formula?

Unfortunately we do not carry Masterblend 9-12-34 Strawberry Formula. It contains a mixture of components that have been classified as a hazardous oxidizing good so it is too expensive to ship in small quantities. For growing strawberries, we recommend Masterblend’s 4-18-38 Tomato Formula, which has been tested to work very well with multiple strawberry varieties. 

Do you sell Masterblend 5-11-26 Hydroponic formula?

At the moment we do not have the 5-11-26 Hydroponic formula. In order to grow hyrdroponics we recommend our 4-18-38 which is very well suited for this.

Why are the packages separated?

The packages store nutrients separately because the nutrients need to be added to the water at varying moments. When the nutrients from the packages are stored together in one bag, nutrient lockout can occur, which causes insoluble particles and therefore the nutrient mix becomes incomplete.

Is Masterblend available in liquid form?

Masterblend is available in solid form. We provide Masterblend nutrients in solid form for various reasons. Solid nutrients are cheaper than liquid nutrients. The solid form takes up less space and weight during shipping than liquid nutrients which contain a relatively large amount of water, so you buy the same amount of nutrients in a much lighter package. This way we ensure optimal shipping weights and the best prices in terms of shipping for you as a customer. This makes solid packages also easier to store. A blog regarding this topic can be found via the following link: Solid or liquid Hydroponic nutrients?

Can Masterblend be used for plants growing in soil?

Yes, Materblend nutrients can be used for plants growing in soil or potted plants. Masterblend is originally designed for hydroponic systems. Though plants growing in soil can take up nutrients from the Masterblend packages and respond very well to them. 

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Hydroponics

What is nutrient lockout?

Nutrient lockout means that the plant is unable to intake the nutrients that you are feeding them. The basic nutrients needed to remain a healthy plant are not absorbed in a nutrient lockout. Nutrient lockout can occur as a result of a chemical reaction during the production of a nutrient solution or by storing the different parts of the formula in solid form or concentrate together.


Nutrient lockout is most likely to occur when adding calcium nitrate while the magnesium sulphate or Masterblend 4-18-38 has not completely dissolved yet. The calcium nitrate will react and form solid, insoluble particles, which makes it unavailable for the plant. When you mix the Masterblend packages according to the mix instructions a nutrient lockout will not occur. Always ensure to stick to the ratios in the instructions and completely dissolve the nutrients one by one.

What are micronutrients?

The nutrients a plant needs can be divided into macro- and micronutrients. Macro- and micronutrients are both important for plant growth and development. Primary macronutrients are nitrogen (N), Phosphorus (P) and Potassium (K). Secondary macronutrients are calcium, magnesium and sulphur. Micronutrients are considered the trace elements the plant normally subtracts from the soil such as copper, boron, iron, zinc, manganese and molybdenum. In the Masterblend 4-18-38 mix combined with calcium nitrate and magnesium sulphate, all these macro- and micronutrients are all included in the total nutrient solution. So the Masterblend packages we sell in our webshop contain all of the macro- and micronutrients your plant needs to grow. Click on the link to get to our Shop.

What type of hydroponic system should I be using?

The nutrients we provide can be used in any type of hydroponics system. The hydroponic system you want to use depends on your preferences. Masterblend nutrients are very well suited to be used in systems such as aeroponics, kratky, deep water culture (DWC), drip systems, Dutch buckets, nutrient film technique (NFT) and other types of systems.  A blog regarding hydroponics systems and the advantages and disadvantages of these systems can be found by clicking the following link: A guide to help you choose between five hydroponics systems.

Do I need to make use of demi water?

No, not necessarily. Demi water is short for demineralized water, so water without any minerals such as calcium. The advantage of demi water is that you increase the control of nutrients that are present in your nutrient solution and you always know from which point you start in terms of pH and EC. In our opinion for growing at home demi water is not necessary and you can just make use of regular tap water, as tap water does not have a large number of chemicals added to it in most locations.

What is pH and why is the level of pH important?

The pH level is an important figure when growing with hydroponics. The pH level tell you something about the acidity or basicity of the water. The pH levels indirectly tell you something about the availability of nutrients to the plants, and can lead to potential nutrient deficiencies or toxicities. The pH is within an optimal range of 5.5 – 6.5 for most vegetables. However, pH levels vary per plant, an overview with the optimal pH range per plant can be found when following the following link: The important role of pH and EC levels in hydroponic plant growth.

What is EC and why is the level of EC important?

EC is short for Electrical Conductivity, which measures the concentration of dissolved salts and minerals in a nutrient solution. EC basically tells you how much nutrients your water contains. The ideal EC level for a hydroponic system varies depending on the stage of plant growth, the type of plant and the nutrient solution. Generally, the EC level needs to be in between the ranges of 0.8 to 2.5 mS/cm. More information regarding EC and the optimal EC levels per plant can be found by following this link: The important role of pH and EC levels in hydroponic plant growth.

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Sales

Do you have certain action codes or special deals?

We normally do not offer any action codes for our products. This is because we offer our products and shipping rates at the best prices possible. We aim to provide the best high-quality products at the most convenient prices, so you have value for your money!

Can I buy products in larger volumes?

Yes. If you want to purchase products in larger volumes you can fill in the contact form. Click here to get to the contact form: Contact Hydroponics Europe. We will respond as soon as possible to your request!