How to store liquid fertilizers

How to store a liquid fertilizer?Various types of liquid fertilizers are used on greenhouses in horticulture. In most cases, part of these fertilizers used contain hazardous substances. The storage of these hazardous substances is an important consideration, because the unsafe handling of these liquid fertilizers can lead to health problems, personal injury or even explosions. Not every company is aware of this and often not enough attention is paid to the correct way of storing hazardous liquid fertilizers. Recently, a number of changes have been made regarding the legislation of liquid fertilizers. As a result, other issues become points of attention. Therefore, we have listed the most important ones for you.

PGS 31 guidelines for liquid fertilizers

When a company stores liquid fertilizers, it must comply with the guidelines of PGS 31. In the video below, product specialist Jaap Lubbersen explains these guidelines.

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Drip tray

Liquid fertilizers are stored in a dedicated storage area. For any form of liquid fertilizer larger than 50 litres, it is important that the storage facility is equipped with a drip tray or liquid-retaining floor, so that leaked or spilled hazardous substances cannot escape. The PGS 15 regulations contain the following information on this subject:

“If the working stock consists of a quantity of more than 50L, the products must be placed above a dripping tray or a facility like this. This can be deviated from, if (the relevant part of) the floor of the production/workspace in question is at least liquid-retaining.”

Separate storage for hazardous substances

Some liquid fertilizers may react with each other, causing dangerous gases, heat generation or precipitation, among other things. To prevent this, liquid fertilizers that can react with each other should be stored separately. Here you can see how different substances react with each other and what you can do to prevent this. To prevent liquid fertilizers from being unloaded in the wrong pipes, you can have unloading points fitted with slot spanners. Watch the video below for more information.

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Also make sure that spilled product is disposed immediately and keep the storage area clean.

Lockable door

For extra security you can choose to provide the storage areas with a lockable door. This will prevent unauthorized persons from entering the storage room with liquid fertilizers. Please note that the storage space must be openable from the inside without the need for a key.

Warning Signals

Make sure that the company’s storage location of the liquid fertilizers is well indicated with warning signals. These must indicate the hazards of the stored substances. The "Fire, open flame and smoking prohibited" sign must also be present in all storage facilities. When storing and unloading liquid fertilizers, stickers with CLP icons must also be placed on the pipes and barrels. 

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In case of emergency

If, despite the measures taken, something does go wrong, it must be possible to take immediate action in the event of an emergency. Therefore, make sure that there is a fire extinguisher of at least 6 kg near each storage area. It is also strongly recommended to equip a company with an eye shower.

Fertilizer quality

In addition to proper storage for safety reasons, it also contributes to maintaining the quality of the product in the case of solid fertilizers. Therefore, when storing solid fertilizers, also take the following points into account:
  • Store the fertilizers inside and in a dry place and make sure that they cannot come into contact with water (e.g. through leakage or rain). Also check regularly for any leaks.
  • Ensure that the products do not come into contact with other fertilizers (e.g. residues from previous storage or spilled product) or with oil and grease.
  • Do not damage packaging and keep the storage area free of sharp objects.

Product specialists liquid fertilizersAny questions about the storage of (liquid) fertilizers?

Do you have any questions about crop care, or do you want personal advice about liquid fertilizers? Contact one of our product specialists, or use the form below.
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