Frequently asked questions

Can I switch from another brand?

Yes. We recommend changing gradually and checking the dose, because products with a similar purpose can have different concentrations. Ask us if you need help choosing a replacement.

Can I collect my order?

No. We do not have a physical shop, and our address is a postal address only.

When will my order arrive?

We usually dispatch orders placed and paid for before 13:00 on the same working day. It can take longer, for example if a product is out of stock. See our shipping and tracking information for more details. Once your order has been sent, use the tracking information for delivery updates. Contact us if your parcel does not arrive as expected.

How should I store your products?

Keep products cool, dry and out of reach of children. Powders generally keep for several years when stored properly. Follow the instructions supplied with each product.

A solution you mix yourself can develop sediment over time; shake it vigorously a few times. Our liquid products contain stabilisers to reduce sediment and maintain their shelf life and performance.

What if sediment develops?

Undissolved salts: a small amount of undissolved material does not affect the performance of these products. To improve dissolution, use lukewarm to warm water and shake vigorously.

Cloudiness or mould in a mixed solution: the guidance for our products is to add either 25 ml AquaCarbo per 500 ml of plant fertiliser, or 15 ml white food-grade vinegar per 500 ml of plant fertiliser. Do not use cleaning vinegar. Vinegar acidifies the solution. If visible mould remains, the solution can be passed through a coffee filter. Contact us if you are unsure what has formed or whether this advice applies to your product.

Can I exchange a product?

Contact us with your order number, the product and the quantity you want to exchange. After we receive and inspect the returned products, and receive any additional payment required, we send the replacement products. Any amount we owe you is refunded within 14 days of receiving the exchanged products. You pay the cost of returning the product. See our returns information (Dutch) for the applicable conditions and return postage.

How do I make a complaint?

Please contact us through the contact form or email . If we cannot resolve it together, you can ask WebwinkelKeur to mediate.