Try decreasing the temperature of the room too. Do this very slowly and always keep the temperature consistent. The plant will need time to adjust. Any change you’ll need to make to a plant’s environment or medium needs to be done carefully and patiently. It won’t matter how well you water and feed your plants, if you don’t take proper care of the environment, the plant will die.
Yellow leaves are another sign that your plant is being subject to light burn. However, yellow leaves can also signify nitrogen deficiency. The difference is that yellow leaves caused by this nutritional deficiency start from the bottom of the plant, display significant wilting, and will either fall off or are extremely easy to remove. On the other hand, yellowing caused by light burn will occur at the top of the plant, and these leaves will be much sturdier and harder to remove.
Although white buds may look interesting, most of the time they have been rendered useless. The heat degrades cannabinoids present in the resin, which causes buds to lose potency. The scent and taste of these buds will also be less than desirable. The terpenes responsible for these traits are highly volatile aromatic hydrocarbons, and excess heat will also cause them to degrade.
Light burn will only happen to an outdoor plant in a specific situation. It might happen if you grew it in the shade and just now transferred it into the light. In cases like this, the plant won’t be used to the heat and light and will eventually die.
If reducing the light or moving the plant isn’t an option, you can always low stress train your plants. This is a technique for obtaining more yields, where you try to keep the plant’s branches all at the same height. As the stem gets taller, it should be bent sideways and kept in that position with an external aid.
Although not fixable with a nutrient solution boost, this is a problem that your plant can survive easily. As long as it’s not too late, after this article, you’ll know how to fix it.
One surefire symptom of light burn is bleaching of the flowers. This phenomenon occurs when flowers are located too close to high-powered lights. You may have seen images online of pure white “albino” cannabis flowers. This might look like the intentional development of rare genetics, but the fact is, most of the time this is simply bleaching. Luckily, it’s very hard to miss your flowers turning bright white.
Growers can also utilise a lux meter to measure how much light different parts of their plants are being exposed to. These devices are used to measure lux, the unit of illuminance, per metre squared. They are handy as they offer readings regarding the intensity of light beaming down on any given area. Lux meters are ideal for hobby and small-scale growers as they are leagues cheaper than other light-measuring devices on the market. Growers can use them to determine if their plants aren’t getting enough light to produce an optimal yield, or if they are getting too much and are at risk of light burn.
The first thing you should do is move your plants a bit further away from the lights. This can either be done by moving the plants or by moving the lights, if you have the space. Take into consideration the most affected areas of each plant when choosing a new location for them. You can also remove some of your lights. If you have these well organized, it shouldn’t hurt your plants to remove a few bulbs.
This can be a very hard problem to fix if not done in a timely manner. Be sure that you're informed about it if a light burn ever happens to you!
Cannabis light burn is the extreme case of cannabis light stress, which occurs when your plant gets more light than it needs for healthy growth. This can lead to bleaching of certain parts of the plant such as the leaves and flowers. However, light stress/burn can manifest itself in many ways, including the browning and drying out of leaves, giving them a dry, crispy texture.
Here are some frequently asked questions that may help you better understand light burn.
When something goes wrong during a grow, most growers think about water or nutrient-related issues. If you think your plants are experiencing light burn, how do you know it’s not a nutrient deficiency? Well, while the symptoms of the two can appear to be very similar, it’s possible to easily tell between the two by considering the symptoms your plants are showing. It’s unlikely you’ll experience light burn-like symptoms due to excess of any of the nutrients described below, but it’s a possibility nonetheless (particularly with phosphorus).
If you have the resource to invest in a lux meter, it is highly recommended you do so! Not only is this useful in assessing whether your plants are getting too much light, but it can also identify areas receiving insufficient light. This is particularly important for commercial growers, as it maximizes bud production. Lux meter readings are given in lux/m 2 and should fall in the following ranges based on plant maturity:
Experiencing cannabis light burn can be very stressful – especially if it’s your first time going through it. However, with the right precautions and growing know-how, it’s possible to bounce back from even the worst light stress! Let’s learn how to do it.
- Changes in photoperiod
- Changes in temperature
The following symptoms can cause cannabis plants to change sex:
The following are symptoms of cannabis light stress:
Ran out of height? No problem!
Cannabis light stress and cannabis light burn are two issues that can damage your plant and negatively affect its quality. Here’s what you need to know about this common problem, as well as how to recognize and solve it.