![]() The light must emit variable quantities of blue, red, green, UV, and IR light. In summary, you will need a full-spectrum grow light for tomatoes’ highest yield and quality. It’s also necessary for flower formation. UV light can improve the taste of tomato plants and make them more resistant to disease.īut IR light can increase vitamin C and sugar levels. Your tomato plants also need small amounts of ultraviolet (UV) and infrared (IR) light. So, a good grow light for your tomatoes should emit moderate to small quantities of green light. In tomatoes, green light may increase plant height, leaf area, and rate of photosynthesis.īut, in large quantities, green light can adversely affect growth. Still, it plays an important role in their development. Green light is not used efficiently by plants. Your tomato plants also need other light frequencies besides blue and red light. Unfortunately, you won’t find many grow lights that emit good amounts of far-red light. Recent studies show that far-red light can enhance the yield of tomatoes. But they mainly emit low red light (below 700 nm on the spectrum) and little far-red light (above 700 to 750 nm). Most grow lights made for flowering plants emit more quantities of red light than blue light. When growing tomatoes, you need to ensure that the ratio of red to blue light is high. ![]() Red light makes tomato plants more resistant to disease and environmental stress. We know red light is vital to photosynthesis. The quantity and quality of flowers largely depend on the red light. Red light carries less energy than blue light, but plants use red light more efficiently.Īll fruiting plants need an abundance of red light during their flowering phase, including tomatoes. Tomatoes need red light in larger quantities than blue light. It also saw that when the quantity of blue light rises above a specific limit, it becomes counterproductive.Īnother study showed that tomato plants grown exclusively under blue light had a reduced rate of photosynthesis.īlue light is necessary for the growth of your tomatoes but in moderate quantities. It can also increase the vitamin C content of your tomatoes.Ī new study published in 2019 found that blue light increases the tomato plant’s mass and yield. But the majority of plants mostly need blue and red light-and tomatoes are no exception.īlue light is vital for your tomato plants’ vegetative phase-when they grow their leaves and stems. The combination of light that a plant needs will vary depending on the species. Plants use specific frequencies of light that can fuel photosynthesis. Two major features make a grow light suitable for tomato plants: 1) An Optimized Light Spectrum You’ll find hundreds of grow lights on the market today, but few will work well for tomatoes. What Makes A Grow Light Suitable For Tomatoes?
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