Growing sustainability


Moving to a durable future, together.

It’s Rainbow Grower's mission to reduce their ecological footprint further and further. We strive to make our farming processes greener in a continuing process. Within our production chain, we strive to produce the lowest amount of waste, use less and less natural gas and reduce our CO2 emissions continuously.

We take our corporate social responsibility. Of course, we strive for the best quality product, but we also focus our attention on the environment, our direct surroundings and humanity.

Our modern greenhouses are equipped with windows, heating, screens and modern climate computers. As a frontrunner in sustainable farming, we use biological control agents, a full recirculation of water and heating via geothermal energy.


Farming biologically is the core of the way we do business.

You can see this in the way we prevent and cure diseases and pests. To create a biological balance in the greenhouses, we use biological control agents. Using biological resources is what’s best for the crops, the quality of the fruits and the environment. That’s what we call a win-win situation.


Minimising water usage is an important part of producing sustainably.

Peppers aren’t grown in the soil, but on a substrate slab. We add a detailed recipe of different fertilisers to the water we feed the plants. All surplus water will drain from the slabs, it will be gathered, disinfected with a UV light and reused.

Rain falling on the greenhouse roofs is collected into one of our many water basins. This way, we always have enough water stored up and we can use the available water in the efficient way. Our companies use the most modern and efficient substrate slabs and watering units.

100% residual water reused


Our greenhouses are heated using geothermic energy, obtained through our partnership with Energie Combinatie Wieringermeer (ECW).

The geothermic warmth is obtained from a sand layer that’s 2400 meters beneath the earth’s surface. Here, the water is at constant temperature of 90 degrees Celsius (194 degrees Fahrenheit). This makes geothermic warmth an ideal solution for a modern and durable horticultural area. This infinitely renewable energy source lets us reduce our dependency on fossil fuels. This makes it a perfect solution to reduce our ecological footprint as much as possible.


When you grow fruits and vegetables, all sorts of waste are left over.

We try to find the best way to dispose of this waste in the most environmentally friendly way.

All of the plant remains are shipped to a fermenting facility, where they will compost and produce energy. All peppers that aren’t suitable for wholesale will be processed into soups, sauces and vegetable packages.
Peppers that aren’t suitable for human consumption will be shipped to local farmers to be used as cattle feed.

To keep water usage at a minimum, our plants are placed on a substrate slab. These are rockwool mats, on which the plants can take root and where water is retained for a longer period of time. At the end of the season, these slabs are picked up and processed to live a second life as bricks.

Take a look in the greenhouse at Rainbow Growers.