There’s all sorts of nutrients that you can feed your plants for support. However, nitrogen, potassium, and phosphorus are the three most important ones. As long as growers keep these three in check, they’re well underway to a good harvest.
Nitrogen, Phosphorus, And Potassium: The Three Titans Of Nutrient Country
So how do you know whether cannabis plants are suffering from nitrogen deficits? You can tell by discoloration of the oldest lower leaves. This is because nitrogen is a nutrient that can be relocated throughout the plant. If there is a lack of nitrogen when new leaves are formed, nitrogen stored in the older leaves is used instead. This causes the lower leaves to turn yellow and fall off eventually. Nitrogen deficits are also apparent in slow growth. The plants may weaken and become susceptible to disease and pests.
It’s a good idea to keep track of these NPK percentages. Cannabis plants will need different ratios in every stage of their life. Product packaging usually indicates the particular stage for which fertilizers are intended (growth or flowering). In the growth or vegetative phase, weed plants need more nitrogen, whereas they can use more phosphorus and potassium while flowering.
Too high levels of nutrients causes…
As a cannabis grower, your goal is to give your plants the right amount of nutrients at the right time. There are two main life stages for cannabis plants (vegetative stage and flowering stage). Each stage has different nutrient requirements. Luckily, many nutrient companies make great products even though they’re all using different formulas and techniques. Here’s how they differ:
The biggest downside of House and Garden (besides price) is it’s getting harder to find online. This brand is often best purchased in person at a hydro store. Get a custom nutrient schedule directly from the people at House & Garden via their free online nutrient calculator.
What’s the Best NPK Ratio for Cannabis Nutrients?
Now that you understand everything you need to know about picking the right nutrient system, check out some supplements!
It may surprise you that the most common reason growers get nutrient deficiencies is because the pH is too high or too low. This happens even if the right amounts of nutrients are present because your weed simply cannot absorb the nutrients if the pH isn’t in the correct range.
Examples of Good Can nabis Nutrients
Important Tips on Cannabis Supplements
Ideally, cannabis growers should gradually alter their NPK values, which means using a ratio of 1:3:3 in early flowering and 0:3:3 in late flowering. Nitrogen should be completely absent from the mix for at least the final three weeks of the bloom period.
Cannabis plants require many nutrients, but nitrogen, phosphorous, and potassium are the three most fundamental elements in a plant’s diet.
Most high-quality soils contain plenty of nitrogen. It may not be necessary to add any of these key nutrients during the first month of growth. When growing in low-quality soils or other growing mediums, though, it’s essential to give your cannabis plants the nutrients they need.
The Importance of NPK for Cannabis
Ready-made plant feeds and fertilisers with set NPK ratios can be bought from most garden centres and applied to cannabis plants with minimum fuss. Granular feeds are the most common, but liquid and gaseous products are available too.
Bone meal and fish meal are excellent sources of phosphorous and are popular among gardeners. These can be scattered on the soil around a plant’s roots during flowering to bring NPK ratios up to the ideal value for cannabis.
Most fertilisers and plant feeds contain NPK values on their labels. These appear as three numbers denoting the relative concentration of each component. For instance, a ratio of 2:3:8 indicates that a product contains two parts nitrogen to every three parts phosphorous and eight parts potassium. Cannabis growers should be aware that NPK ratios always appear in this order.
Known by their chemical symbols N, P, and K, these three nutrients are essential for healthy growth. As cannabis plants move from the vegetative to the flowering stage, the ideal NPK ratio shifts. Meaning growers need to adapt their feeds and fertilisers.