Light Burn & Light Stress On Marijuana Plants

There is only so much light your marijuana plant can take. At some point, the plant will show evidence of strain around the main points where it receives light. Brown or yellow spots will show up on the leaves, followed by burnt tips and the borders will remain green.

In the spots where it’s getting an excess of light, the leaves will look burnt. Learn how to identify and prevent light burn on your marijuana plants.

What is light burn?

Your buds can turn albino through light bleaching. This frequently happens with high-power LEDs and HPS lights that are placed too close to the top of the plant. As a result, your plant gets way more light than it needs. Once your buds are burnt, their strength diminishes and may get to the point to where it has no THC. So, the moral of the story is: make sure you don’t give them too much light to prevent any bleaching.

What is light burn

Download my free grow bible to learn more about light burn on marijuana plants.

Grow Bible

  • Grow with my Quick Start Guide
  • Discover secrets to Big Yields
  • Avoid common grow mistakes

    Calling light-bleached marijuana names such as “white cannabis” or “albino cannabis” is not a good thing. The fact that it is white is a sign that it is in bad condition. This is not what you want.

    How to fix light burn

    If you think the plants are getting more light than is necessary, start by sliding the grow light farther from the top of the plants.

    How to fix light burn on marijuana plants

    Light bleaching because of sunlight is very rare when outdoor growing and there is no way they will ever get too close to the sun. If you move your plants from a bad situation, then into the sun they may display signs of light bleaching if they never had a chance to adjust to the increase in light.

    Also read From light to growth: Growing the best weed with light

    Take it slow when adjusting your plant’s conditions. You don’t want to stress your plant out for either outdoor or indoor growing.

    Maintain a cozy temperature consistently for the best results and health. Think about it like this, if you feel like it’s too hot, then certainly it’s too hot for the plants. Things aren’t as simple for outdoor growing, but take the time to learn what to do for outdoor heat.

    Marijuana plant symptoms

    Plant symptoms of cannabis light burn

    Leaf symptoms

    • Tips/Edges are burnt or brown
    • Leaves turn pale in color
    • Brown spots
    • Top leaves / new growth is damaged
    • Veins of leaves remain green

    Plants with strong genetics are less vulnerable to environmental stresses, diseases, nutrient deficiencies and pests. Make sure to buy marijuana seeds from a trusted seed bank.

    High-quality marijuana seeds

    Buy quality marijuana seeds

    • We ship daily to all U.S. states for FREE!
    • Our seeds are guaranteed to germinate
    • Guaranteed delivery
    • Get 24/7 grow support

    FAQs about cannabis light burn

    What are some common symptoms of light burn on weed?

    If you notice that the tips/edges of your plant’s leaves are burnt or brown or pale and that new growth is damaged, your plant is most likely experiencing a light burn.

    How do you prevent light burn on marijuana plants?

    Always maintain a cozy temperature consistently for the best results and health of your plants.

    Have you ever dealt with light burn on cannabis plants? Please leave comments or questions below.

    Happy growing!


    Avatar for Robert Bergman

    Robert Bergman

    Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations. His passion for growing led him to develop his own Gold Leaf strain. Now, Robert is dedicated to sharing his knowledge with the world.... [Read full bio]


    marijuana grow bible
    • Grow With My Quick Start Guide
    • Discover Secrets To Big Yields
    • Avoid Common Grow Mistakes