If you fly to Schiphol Airport in the evenings, there is a good chance that you will pass over the horticultural area ‘t Westland. That is not to be missed because the greenhouses light up like a Christmas tree.
Horticultural greenhouses in the Netherlands consume 80% of agricultural energy consumption. So the conclusion can quickly be that a greenhouse is not eco-friendly. Certainly not, as the pesticides used in the monocultures in those greenhouses are often far from environmentally friendly either.
However, there are also greenhouses that are eco-friendly. What should we pay attention to if we want a greenhouse for our vegetables?
Some of the links are affiliate links. As an affiliate associate, we earn a commission when you purchase any of the products offered through the shared links at no extra cost for you. This helps us maintain this website.
Table of contents
Reducing energy consumption
For years, many people have trusted greenhouses as a great way to grow quality healthy fruits and vegetables on your own all year round. And recently, growing our own natural and organic garden has become more and more popular.
So it comes as no surprise that many people are now building eco-friendly greenhouses to help grow safe, high-quality fruits and vegetables right at home.
You might not think about it, yet, growing our own vegetables is a great way to reduce our energy consumption. Our food doesn’t magically appear at the grocery store, it has to be shipped there, usually by truck, and sometimes from very far away.
That can consume a lot of energy, which we save by growing our own food at home. And having a greenhouse lets us grow vegetables all year round. So why waste all the good we’re doing by using tons of energy in our greenhouse?
Types of greenhouses
- Mini greenhouse. At the time we were not yet worried about the plastic problem, I bought small containers with a raised lid. You can easily make such a small greenhouse yourself with a large flower pot and a glass plate that you place on it;
- Garden frame. The easiest one is a tunnel arch with a plastic cover. To avoid the use of plastic, a bottomless container with a glass cover placed over the plants in the garden is better;
- Wall greenhouse. The advantage of a wall greenhouse is that the heat is absorbed by the wall so less energy to warm up is needed. The disadvantage is that there are fewer sun-hours than in a free-standing greenhouse;
- Greenhouse. A small one for personal use in the garden;
- Industrial green-warehouse. Several rows of greenhouses next to each other.
- Unheated greenhouse;
- Cold greenhouse;
- Temperate greenhouse;
- Tropical greenhouse.
Most greenhouses for personal use are cold greenhouses, meaning there is no additional heating. A hobbyist growing orchids will want a heated greenhouse.
The commercial greenhouses in Northern Europe all have climate control and lighting. In the Netherlands, there is a lot of research into sustainable ways. The greenhouses are made of glass and the lighting is LED.
In Spain, the greenhouses are made of plastic. And because plastic is considered a disposable material, it is not used economically.
Almeria is notorious for the number of plastic greenhouses. Besides the Great Wall of China, this is the only man-made object that can be seen from space!
Energy efficiency on a small scale
If we live in a cold(er) climate, we can’t just use less heat in our greenhouse during the winter, because that could have disastrous effects on the plants. Yet, we can invest in lower energy light bulbs and increased insulation in the winter.
Double glass is a way to save energy and money. Putting kraft paper or a blanket on top of the greenhouse at night might help. This way the heat is let in during the day and sealed inside at night.
In some greenhouses, saving energy is as easy as opening the vents during the hot part of the day, and closing them during night-time cooling.
Sustainable pest control
Another great way to make any garden and greenhouse more eco-friendly is to reduce the use of chemical fertilizers and pesticides. While a greenhouse can protect our plants, we still may have pest or disease issues.
Especially in a greenhouse, where they can’t escape, the use of ladybugs against lice and bumblebees for fertilization is fabulous.
Sustainable use of water
Did you know that certain areas of the United States will run out of fresh usable water before there’s even a global effect of global climate change? That’s because certain areas are using water at an alarming rate, which is why it’s a great idea to cut back on water use in our eco-greenhouse.
Because they don’t get rainwater, greenhouse plants need to be watered, but what water we use makes a difference. The easiest solution is simply to collect the rainwater and use that to water the plants.
A simple gutter system can be installed that runs exactly where you need it. You can also manually apply collected rainwater to the plants, or use a pump system. Just remember that pumps are not only expensive, but they’re also going to use energy as well.
Another great water solution is to reuse greywater from another area of your house. Wastewater from baths, boiling food, or even water that runs when you’re waiting for the sink water to warm up, can be collected and used for watering plants. Just remember to pay attention to what chemicals might be in your wastewater.
Sustainable construction of the greenhouse
It is also advisable to pay attention to the materials of the greenhouse. Although aluminum is light, which makes it a pleasant material to work with, it is also environmentally unfriendly. The same goes for plastic.
Aluminum can be replaced by another metal or wood. Glass can be used instead of plastic.
The composition of paint is often forgotten in making our home and environment greener. Most paints are plastic-based, not to mention the chemical liquids used to clean the brushes.
A greenhouse is not eco-friendly?
By making small adjustments to our greenhouses we can actually make it a lot greener! And with some extra attention, our greenhouses will definitely be more eco-friendly than the commercial ones.
- Reduce energy usage;
- Use or reuse sustainable materials;
- Flooring is not necessary;
- Recycle materials and garden waste;
- Collect rainwater;
- Install solar power;
- Have double glazing.
Do you have a greenhouse or a hotbed? Tell us in the comment box below.