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nutrient deficiency chart for growing marijuana

Let’s research into marijuana plant deficiencies and nutrient overbalance. Macronutrients are considered the most important ones for the healthy leaves, generous harvest and mass cannabis production.

Phosphorus excess is seldom noticed. Nevertheless, do not use off-the-scale amounts of these nutritional agents. The last macronutrient from our list is Potassium. This nutrient is responsible for the flower formation process. One of the most dangerous nutrient plant deficiencies cannabis afflicts with is lack of Potassium. All leaves become brown, unhealthy yellowing takes place. Take a look at the cannabis deficiency chart to notice changes that Potassium liability brings.

An appropriate cannabis growing – types of nutrients

All immobile elements aim to provide the cannabis plant with a balanced amount of vitamins and needful hormones. Additionally, they regulate the content of prolific phytocannabinoids (THC and CBD). So, it is necessary to pay attention to “Sulph”, “Cal”, “Mag” deficiency symptoms and character of their excess.

Macronutrient excess and deficiency in cannabis plants

Many cultivators face cannabis leaf problems caused by deficiencies and excesses of nutrients. Both lack and excessive surplus of nutritive matters are harmful for the cannabis plants. Your harvest can be in danger if there is an imbalance of key factors and nutrients takes place. It is necessary to pay attention to all types of nutritional agents that provide healthy growth of your plants.

Nutrient deficiency chart for growing marijuana

An excess of calcium cause a slight wilting of leaves also results in stunted growth. Too much calcium blocks the absorption of other nutrients, specifically iron, magnesium, manganese and potassium.

An excess of boron causes leaf tips to yellow and then burn. If the plant continues to get too much boron, the whole leaves will turn yellow and begin to drop.

Mg — Magnesium

Plants that get too much sulfur do not develop as well, with smaller and darker foliage. The tips and margins of the leaves can become discolored and burn.

Getting too much manganaese results in dark orange to dark brown mottling on the leaves. Again, it begins with the younger leaves and later affects older leaves as well.

Mo — Molybdenum

When a plant gets too much potassium, the symptoms are virtually identical to an excess of phosphorous. In addition to all those issues, the root zone also suffers a pH drop (it becomes more acidic).

Nutrient deficiency chart for growing marijuana

Potassium deficiencies are also common during the flowering phase. A flowering cannabis plant uses a lot of potassium since potassium is what helps the buds swell in size. A potassium deficiency shows itself via the yellowing and ‘burned’ look on the edges of the blades of leaves. Nutrients rich in potassium are easy to find at any gardening store.

If a cultivator can confidently determine that it is indeed a nutrient deficiency or deficiencies that they are dealing with and that it’s not some other type of factor, then early intervention is extremely important. If a plant is truly experiencing one or more nutrient deficiencies it does not take long for the plant to be harmed to the point that it cannot be salvaged.

Magnesium deficiencies are more common during the flowering phase, however, they can occur during the vegetative phase as well. Magnesium deficiencies show on leaves in the form of interveinal yellowing versus the all around yellowing that occurs with a nitrogen deficiency. The easiest way to address a magnesium deficiency is to include more epsom salt in the feeding schedule.

It is a virtual guarantee that if you cultivate long enough, you will run into nutrient deficiencies. Educating yourself on common types of cannabis nutrient deficiencies and being prepared ahead of time very well could be the difference between you salvaging your harvest or having no harvest at all.

Common Nutrient Deficiencies During The Flowering Stage

Many products exist that can be added to water and fed to cannabis plants to fix a nitrogen deficiency problem. Make sure to proceed with caution when it comes to nitrogen. A little goes a long way and too much nitrogen can quickly kill a cannabis plant. As with all nutrient deficiency adjustments, try to add additional nitrogen to the feeding schedule of one plant and see how it reacts. If it seems to help, then apply the additional nitrogen to the feeding schedule of the other plants.

If that is happening with your plant, back off using nutrients and just feed the plant water, and lots of it. Flush cannabis plants with 3-4 times as much water as they normally receive and let as much water pass through the soil and leak out of the bottom of the containers as possible.

Test the water ‘runoff’ after it passes through the grow medium to see what levels of nutrients are in the runoff. Hold back on feeding the cannabis plant whichever nutrients are off the charts in the runoff water tests until the levels have come back down to normal, and even then, only feed the plants half as much of those particular nutrients for a couple of weeks following the flushing.

Nutrient Uptake

It is nearly impossible to refrain from getting emotionally invested in a cannabis garden. That is also true regarding the financial investment. So when things go wrong in a garden, no matter the size of the operation, it can be soul crushing.

The Green Flower team, in conjunction with nutrient expert Simon Hart of Grotek Nutrients, has identified some of the most common types of cannabis plant nutrient deficiencies. In this article, we will discuss their deficiency symptoms and how to properly address each type of problem you’ll likely encounter.