top of page

Tips for Using Water Barrels in a Solar Greenhouse

Updated: Mar 1, 2023

If you want to be able to cultivate plants and vegetables throughout the year, a solar greenhouse is an excellent choice. However, to get the best possible growth conditions, you need to give some thought to how the temperature and humidity levels may be controlled. Utilizing water barrels is one approach that seems to be beneficial.

In this article, we will explore how water barrels can be utilized to enhance the growth conditions in your solar greenhouse, and we will give recommendations for making the most of the benefits that they provide.

The Benefits of Using Water Barrels in a Solar Greenhouse

Temperature Control

Water has a large heat capacity, which means that it is able to retain heat and then release it at a later point in time. You may control the swings in temperature in your greenhouse by filling water barrels with water. This will allow you to keep your plants warm during the chilly nights and cool during the hot days.

Increase the humidity level.

In addition to this, water has the capacity to raise the relative humidity within the greenhouse, which is essential for the growth of some plants that need a more moist atmosphere. You may create a microclimate that is more favorable to the development and overall health of your plants if you position water barrels in close proximity to them.

Rainwater Storage

Rainwater can be collected in water barrels for later use in watering plants, and these barrels can also be used to store water. This not only saves you money on water bills, but it also lowers your carbon footprint since it lowers the quantity of treated water that is used in the greenhouse.

Using Water Barrels in a Solar Greenhouse

Tips for Using Water Barrels in a Solar Greenhouse

Select the Correct Size

Size is important when choosing water barrels for your greenhouse. Larger barrels keep the heat for longer periods of time, but they take up more room. Consider the size of your greenhouse, the available space, and the quantity of water you need to keep.

A decent rule of thumb is to choose barrels that are at least 50 gallons in size or greater, as this will offer sufficient storage for a standard greenhouse. Smaller barrels may be used if space is restricted, but bear in mind that they will not maintain heat for as long.

Proper Positioning

The positioning of the water barrels is critical for temperature regulation and humidity improvement. Place the barrels near your plants so that the heat contained in them may be absorbed by the plants, particularly during the winter months.

This will aid with temperature regulation and give a more stable habitat for your plants. Furthermore, putting barrels near vents, windows, or other sources of ventilation may assist in managing humidity levels, resulting in an ideal growth environment.

Water should be circulated.

It is essential to circulate the water in the barrels on a frequent basis to prevent it from becoming stagnant. This will aid in the preservation of water quality and the prevention of algal development.

You may do this by using a pump or just swirling the water. If you use a pump, be sure it is energy-efficient since it will operate continually.

Fill up on a regular basis.

To avoid algae development and preserve water quality, fill the barrels with fresh water on a regular basis. This will guarantee that the water in the barrels is constantly fresh and ready to be utilized to manage the greenhouse's temperature and humidity levels.

Additionally, the water in the barrels should be replaced every three to six months to ensure that it stays fresh and free of hazardous bacteria or other impurities.

Use Float Valve.

Installing a float valve may assist in keeping the water level in the barrels constant, avoiding overfilling or drying out. This will also assist in guaranteeing that the water in the barrels is constantly at an ideal level for temperature regulation and humidity improvement.

A float valve is a simple mechanism that automatically maintains a steady water level in the barrel, making it an easy option for maintaining ideal greenhouse conditions.

Collect Rainwater

Use the barrels to collect rainwater for later use on your plants. This not only saves you money on your water bill, but it also lowers your carbon impact. Simply position a barrel under a gutter or downspout to collect rainwater, which you can then use to water your plants as required.

Using Water Barrels in a Solar Greenhouse

Use a greenhouse-appropriate water collecting system and cover the barrels to prevent trash, leaves, and other detritus from entering the water. Additionally, be sure to clean the rainwater collecting system on a regular basis to keep it clear of dirt and other impurities.

You can use water barrels in your solar greenhouse to adjust the temperature, enhance humidity levels, and store rainfall if you follow these guidelines. As a result, your plants will have a more stable environment, which will aid in their development and output. Water barrels may be a simple and efficient option for producing ideal growing conditions in your solar greenhouse, whether you're a seasoned greenhouse grower or just starting out.


The usage of water barrels in a solar greenhouse may significantly improve the growing environment for your plants, leading to an increase in both the plants' height and the amount of food they produce. You will be able to properly adjust the temperature, raise the levels of humidity, and conserve rainwater if you follow the guidelines that have been provided above. As a result, you will be able to create the ideal growth conditions for your plants throughout the whole year.

Look no further for a complete solution to all of your solar greenhouse requirements! You can trust that we have the ability and knowledge to help you get the most out of your solar greenhouse since we are committed to offering high-quality goods and great customer service. So, visit Homesteaders West today and begin building a flourishing, healthy greenhouse full of lush, vivid plants and veggies!


bottom of page