Light burns or bleaching in your Cannabis plants are common problems when using grow lights to cultivate. One of the common symptoms of light burn is bleaching. It happens when the buds or leaves are located too close to high-powered grow lights. Aside from that, another symptom of light burn is when the leaves of your Cannabis plants turn upward and gradually turn yellow. The leaves also lose their luster and become crispy. Though saving them is possible, you have to spot the light burn to administer the possible treatment as soon as possible.
Light burns or light bleaching in your Cannabis are common problems when you use grow lights in cultivating your Cannabis plants. Light is essential since it aids your Cannabis plants in manufacturing their food, energy, and development.
However, when the lighting system is not appropriately regulated, it will cause them stress, resulting in light burns. It happens especially when your Cannabis plants canopies proximity to your grow light is too close.
Instead of appearing the usual green color, the leaves become bleached or even white. Light burn happens mostly to indoor Cannabis plants since they use artificial light source.
In addition to leaves discoloration, too much light can damage your buds, since light and heat both break down cannabinoids and terpenes thus reducing the effects, taste and scent of your buds.
High temperatures can cause light burn, particularly when grow lights are too close to your Cannabis plants. That is why you have to keep a distance between your grow light and Cannabis plants. The best range of temperature is between 64°-77° Fahrenheit (18°-25° Celsius).
Light burn is more likely to occur in grow spaces that have a high temperature and low humidity.
During the vegetative stage, humidity should start at around 70% only. Then, you have to gradually decrease during pre-flowering and half of the flowering stage until 60%. As it reaches the final week of the flowering stage, you have to keep it around 50%.
If you fail to keep the following relative humidity, your Cannabis plants are at risk for heat stress and are more vulnerable to light burn. That is why it is recommended to have a thermohygrometer to measure your growing area’s humidity accurately.
Early-stage symptoms of light burn can sometimes be mistaken for heat stress. The following are the known symptoms of light burn that you have to look for:
When you diagnose your Cannabis plants for having light burns, you have to take action immediately to prevent getting to a point of no return. The following things can help you in treating light burn in your Cannabis plants:
Though there are ways to treat light burn in your Cannabis plants, prevention is still better than cure. To prevent further light burn problems, you may do the following to save and keep your plants safe.
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