If you are using bottled nutrients – Most people who get nute burn are feeding their plants extra nutrients in the water. First off, make sure you are using a quality set of nutrients that has been specifically designed for cannabis plants. Any nutrient system designed for plants like a tomato will also work in a pinch. Also make sure you are feeding nutrients for the right growth stage – for example, all cannabis nutrient systems have you feed different nutrients for the vegetative and flowering stage. If you are feeding the wrong type of nutrients for the stage your plant is in, that is an easy way to give your plants lots of nutrient problems including nutrient burn.
(Nutrient burn is often called “Nute Burn” in the cannabis growing community).
Nutrient burn can also happen when plants or seedlings are grown directly in soil that has a high level of nutrients (a “hot” soil or growing medium) such as fresh compost, manure or a nutrient-amended soil mix. This usually happens to young seedlings, and they will “grow out of it” as they begin to use up all the nutrients in the soil, as long as more nutrients are not added.
Therefore, the biggest problem with nutrient burn is the fact that you are losing leaf mass and overall leaf robustness on your cannabis plant.
When the roots take in more nutrients than a cannabis plant can use, the overabundance causes problem with water flow in the plant, triggering brown or bronze “burns” on the tips of your leaves. If nutrient levels are not lowered, the burnt tips start traveling inwards and the ends of leaves start becoming crispy and twisted.
One of the things that can be frustrating about hydro is that different plants or strains will be okay with different amounts of nutrients. You can be giving 2 plants the exact same levels of nutrients, and one might get nutrient burn while the other plant is getting a deficiency at the same level. This is because different plants absorb the nutrients at different rates.
Nutrient burn causes tips to start curling up if it gets bad enough
Problem: You will notice the tips of your marijuana leaves showing the first signs of nutrient burn by turning yellow, tan, gold or brown. A light case of nutrient burn will only affect the tips of your leaves.
Nutrient Burn is More Serious in the Flowering Stage
Nutrient burn causes the tips of cannabis leaves to turn yellow or brown. The burnt tips are the result of too-high levels of nutrients. Learn how to fix it!
With the exception of possibly providing your seedlings with too many nutrients when using “hot” soil, nutrient burn most often occurs when you feed your plants excessive nutrients. The first thing you should do is make sure that you’re giving your plants the correct type of nutes depending on their growing stage.
Yet in the flowering stage, cannabis plants put all their energy into the buds, rather than growing leaves and stems. This is also why the flowering stage is the most critical period of growth. While a slight case of nute burn during flowering may be tolerable, the plant cannot recover from a severe case in which massive amounts of leaves have turned. Because of this, you should be especially careful when giving nutes in the flowering stage. If you want to keep the risk low, you should always start with less than the recommended dosage of the particular type of nutrients you are using.
An overabundance of nutrients will normally show the classic signs of discoloured leaf tips, but nute burn also frequently manifests alongside nitrogen toxicity, causing plants to make leaves “claw” downwards as well.
While you cannot “repair” the leaves that are showing signs of nutrient burn, you definitely want to stop the issue in its tracks to avoid further problems that could threaten your crop.
Nutrient burn can happen to every grower. Fortunately, it doesn’t have to cause you major headaches once you know how to spot the signs and quickly solve the problem.
Nutrient burn is usually the first symptom that appears after giving your cannabis plants too many nutrients. As a result of an overabundance of nutrients that the plants cannot use, the tips of the leaves start to become yellow or brown. When the nutrient burn hasn’t been addressed and progresses further, the top of the leaves will become brittle, dry, and twisted, giving the plant a “burnt” appearance, hence the name.
A slight case of nutrient burn doesn’t need to signal cause for alarm. If you recognise it early enough and address it, the damage to your plant and subsequent harvest will be minimal. A severe case of nutrient burn, however will make your plants lose significant leaf mass, seriously impacting the growth of your plants and success of your crop. An overabundance of nutrients that are not “flushed out” can also cause your bud to sustain an unpleasant, chemical taste.
Know that many manufacturers of commercial cannabis nutrients are going well overboard with their recommended dosages. After all, these companies make money from you using their products. Most of the time, these “recommendations” can be far off from what is truly ideal for your plants. It is a good idea to start with half of the recommended dosage and only give more later-on when your plants show signs of deficiency.
Maximising Bud Size – Growing Cannabis Indoors and Out
Nutrient burn can be a common problem for many new cannabis growers. Learn to spot the signs of nute burn and see what to do about it in each growth stage.