How Much Lighting Is Used Growing Tomatoes In Commercial Greenhouse

Gardeners must know how much lighting is used growing tomatoes in a commercial greenhouse, which is 60 Watts/m2 for 16 to 18 hours per day. Regardless if you’re growing in the greenhouse for business or personal use, it’s crucial to generate the optimal conditions indoors for your plants to thrive. A common mistake is to focus on the ideal temperature for growing tomatoes only and then neglect the lighting.

Much like temperature, the lighting system in the greenhouse plays a significant role in the success of your tomato garden. Plants won’t be able to perform photosynthesis if the conditions indoors are incomplete. Tomatoes thrive in full sun, but because we don’t want to overheat the greenhouse, supplemental lighting is the best solution to provide their lighting requirements.

How Much Lighting Is Used Growing Tomatoes In Commercial Greenhouse

What You Need To Know On How Much Lighting Is Used Growing Tomatoes In Commercial Greenhouse

In general, the amount of lighting that tomatoes require in a commercial greenhouse is 60 Watts/m2 for 16 to 18 hours per day. This is recommended both for sowing and transplanting by the government of Alberta. Since you’ll be running a commercial tomato greenhouse, it’s crucial to plan the lighting system and how to achieve this requirement. 



In the seedling nursery, high-pressure sodium lights will provide this condition. However, the placement of the lights is also prominent. Have the lights 6 feet above the seedlings and a distance of 9 feet between each light. Each row of light will then have 12 feet of space between them. 



Once you see the first real leaves appear, you will have to transplant the seedlings. The amount of lighting is still the same, but Alberta also recommends adding carbon dioxide supplementation. According to their findings, this combination will improve early yields. 

You will eventually have to reduce the lighting duration to 12 hours a week before you begin the second transplanting. This way, you can condition the transplants to the main greenhouse changes and avoid light shock. Otherwise, their development will halt. 


How Lighting Affects Tomatoes In Commercial Greenhouse

Now that you know the amount of lighting for the growth of tomatoes, you must learn what makes lighting crucial in a commercial greenhouse. For starters, the color of growing lights affects plants’ growth because they will dictate the similarity with the spectrum your plants use. Additionally, we all know that maximum light intensity will create the best fruit set.

This is the same reason why you’ll notice a higher yield in the spring compared to fall. Additionally, failure to provide the optimal lighting conditions will even prevent the tomato plants from developing flowers. Instead, they will only produce leaves and stems until there is light to support the flower and fruit. 

You must also be consistent in providing the optimal conditions throughout the growing season. For example, if the plants experience a sudden limitation, they risk getting smaller fruits. This will reduce the yield and even the quality of your harvest. 


What Is The Best Light For Growing Tomatoes In Commercial Greenhouse?

For growing tomatoes in a commercial greenhouse, you must know which type of light would be the best choice. High-pressure sodium lights are an economical choice in a commercial greenhouse. Cornell University also mentioned that they are great for increasing light intensity and extending day length. 

However, you must always check the setup of high-pressure sodium lights so that you’ll get uniform lighting in the entire greenhouse. But what about LED lights? Are LED lights the right choice for commercial greenhouse tomato production?

LED lights help in increasing the fruit number and yield. More so, using them in comparison to other supplemental lighting shows an increase in energy savings. Over time, you will have lesser expenses and higher profits.


Is Growing Tomatoes A Good Business?

Growing tomatoes is a good business because of the rapid growth of the industry. Using a greenhouse for production is a good strategy. This is because you will always be able to provide tomatoes at an excellent price, especially when they are out of season. 

You won’t need to worry about unpredictable weather and diseases. Using a greenhouse will ensure a steady production volume, and while you’ll also need to allocate budget being indoors, you can always learn about economic strategies. As mentioned by the Mississippi State University Extension Service, the success of a commercial greenhouse tomato production will depend on your management skills. 

Proactiveness and consistent attention are vital characteristics that you must possess. 



As previously discussed, growing tomatoes in a commercial greenhouse is an excellent investment to venture into. However, you must know the proper management practices, including how much lighting is used growing tomatoes in a commercial greenhouse. For sowing and transplanting,  the recommendation is 60 Watts/m2 for 16 to 18 hours per day. 

Ensuring the proper lighting in the greenhouse has a considerable impact on the production and yield of your crops. For the type of lighting system to use, extensions both discussed the advantages and disadvantages of LED lights and high-pressure sodium lights. Choosing between the two will depend on which you think is more beneficial for your situation. 

Overall, the lighting system is a part of a greenhouse that gardeners must never neglect. Regardless of the crop you have, you must meet their requirements to ensure a productive greenhouse. 


Leave a Reply

Your email address will not be published. Required fields are marked *

How To Prevent Root Rot In Hydroponics: 3 Useful Tips

If you’re a newbie gardener who’s looking to find ways to hone your skills, you’d want to learn how to prevent root rot in hydroponics even before this problem affects your plants.

Hydroponics can be advantageous to crops in more ways than one. However, it also comes with risks of diseases, such as root rot, which can be destructive or even lethal to your plants.

Unfortunately, there are no effective methods to recover the wilted parts that were affected by the root rot once it hits your plants. The only thing you can do if you do not want this catastrophe to befall your crops is to prevent it before it happens. Read on to learn more about this subject.


What is Root Rot?

Root rot is a disease that attacks the plant roots and causes them to suffer decay. This usually happens when a lack of oxygen supply occurs in the substrate.

To give you an idea, think about plant roots that are submerged in water that only has a little oxygen in it. Over time, the plant suffocates and dies.

Aside from rot and decay, this disease also leads to the proliferation of fungi that are naturally present in the soil. These include Rhizoctonia, Alternaria, Pythium, Botrytis, Fusarium, or Phytophthora. As soon as fungi colonies start to grow, they tend to target the weakened roots and infect your precious plant babies.

Once the plant becomes infected, they won’t be able to take in what they need to grow – water, oxygen, and other nutrients. When this happens, it won’t be long before the plant dies.


What is Hydroponics?

In case you’re not aware, the term hydroponic is derived from a Latin word that means “working water”. To put it simply, hydroponics is an art that involves growing various types of plants without soil. If you’re like most people, the first thing that comes to mind when somebody talks about hydroponics would be a picture of plants with roots suspended into the water without using any type of growing medium.


Avoiding Root Rot in Hydroponic Systems

Detecting and identifying root rot can be tricky. When your plants get infected, their leaves and roots gradually wither until the whole crop itself dies from the lack of nutrients, which is a common symptom of many diseases.


What causes root rot in hydroponics?

One of the requirements in hydroponics systems is oxygen. Without it, your plants are basically on the road to death. On the other hand, lack of such is one of the major triggers for root rot, and it must be avoided at all costs.

Just like when planting in soil, you loosen up the ground so that your plants’ roots can have their required intake of oxygen. That is the case for crops grown in aqueous solutions as well. If they cannot breathe, they would not be able to grow.

Another agent for root rot is the temperature. The last thing you would want in your system are parasites that leech nutrients intended for your plants and infect the water during the process. In common terms, these fungi are called molds.

One of the best breeding grounds for these is warm and moist areas. For this reason, if the water temperature inside your reservoir is high, then you are susceptible to it. Something as minor as letting the solutions exposed to sunlight can already be a risk factor.


3 Useful Tips on How to prevent root rot in hydroponics

There is good news! Root rot in hydroponics can be prevented! Just follow these tips:

Tip#1: Use the right air pump

If you do not want root rot to affect your plants, you merely have to avoid its causes. If you need oxygen, keep the water bubbling by providing an air pump of appropriate size, and also give importance to proper ventilation in the room.


Tip #2: Maintain the temperature

The temperature should be maintained within the 70 to 80 degrees F range. Get rid of any materials that can make your system vulnerable to infections, and make sure not to disturb your crops while they are trying to grow.


Tip #3: Get rid of the rotten parts

However, if you failed in preventing the disease, then the rotten parts should be removed immediately. Cut them off as there is no chance of reviving them, and focus on the potential new growth instead. Fix your hydroponics system and eliminate the risks.


Why Give Greenhouse Gardening a Try?

Greenhouse gardening offers numerous benefits to greens aficionados who dare to take their gardening experience to the next level. Aside from acting as a shield against the effects of inclement weather, a mini, hobby, or semi-pro greenhouse can also serve as a protective layer that keeps harmful bugs and critters at bay.

What’s more, its enclosed structure allows you to control your plants’ growing conditions including the temperature, light, moisture, and ventilation of the greenhouse’s internal environment. With a controlled environment, you’ll be able to extend growing seasons and grow plants that aren’t native to your area.



No matter how well-informed you are about how to prevent root rot in hydroponics, you cannot completely eradicate the risks. Therefore, to avoid the worst-case scenario, you should be prepared to sacrifice the infected for the sake of others. While you’re at it, consider trying your hand at greenhouse gardening as well.


Leave a Reply

Your email address will not be published. Required fields are marked *

Sign up to our newsletter!