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Best NPK Ratio for Veg and Flower

Waiakeauka
Well-Known Member
scunkworm
Active Member
scunkworm
Active Member
elduece
Active Member
homebrewer
Well-Known Member

Your info is pretty mixed up there. 3-1-2 for veg though I’ve found 1-1-1 works just as well. 1-3-2 for flower is by far the best NPK ratio I’ve tried thus far.

Too much P locks out Zinc, Iron, and Copper. Not sure where you’re getting N from.

cannabis love
Well-Known Member
Rotweiller
Well-Known Member

Hello Waiakeauka. I’m not sure if this will help you or not but i found this on another website and it made sense to me –
Cannabis requires a 1:2 ratio of P to K throughout all stages of it’s growth.

It’s worth stating for the record the actual ratios of N, P and K that cannabis requires through it’s life cycle:

Vegetative Stage
N – P – K
3 – 1 – 2

Flowering Stage
N – P – K
1 – 1 – 2

Final Flowering Stage
N – P – K
0 – 1 – 2

To translate this into a 12 week schedule for a typical Skunk type such as Cheese or Psychosis would give something along these lines:

Veg week 1: 3 – 1 – 2
Veg week 2: 3 – 1 – 2
Flo week 1 : 3 – 1 – 2
Flo week 2 : 3 – 1 – 2
Flo week 3 : 1 – 1 – 2
Flo week 4 : 1 – 1 – 2
Flo week 5 : 1 – 1 – 2
Flo week 6 : 1 – 1 – 2
Flo week 7 : 0 – 1 – 2
Flo week 8 : 0 – 1 – 2
Flo week 9 : 0 – 0 – 0
Flo week 10: 0 – 0 – 0

This schedule reduces the Nitrogen two weeks into the 12/12 period which will assist in stopping the vertical growth (stretch). It cuts out all Nitrogen after 6 weeks which will result in a less leafy, smoother burning end product with greater density to the flowers. The last two weeks of plain water is sufficient to leach out all accumulated salts and give a clean end product. Three week flush as advocated by some really isn’t necessary if the Nitrogen is cut out after 6 weeks. The people using a three week flush tend to use Canna nutes which have too much N in them for late flowering and this is why they get a benefit from flushing for three weeks.

Hope that makes sense. Despite all the crap the nute companies fill our heads with about the need for all kinds of fancy bottles, you really don’t need any of them. Cannabis is a simple plant, a weed in fact, and all it needs is the correct NPK at the correct time plus a full range of trace elements, that is hard fact and no amount of BS an marketing from the nute companies will ever change that fact.

Anyway Hope this helps you a little bit ? Good luck and Happy Growing

uhavealighter?
Active Member

Hello Waiakeauka. I’m not sure if this will help you or not but i found this on another website and it made sense to me –
Cannabis requires a 1:2 ratio of P to K throughout all stages of it’s growth.

It’s worth stating for the record the actual ratios of N, P and K that cannabis requires through it’s life cycle:

Vegetative Stage
N – P – K
3 – 1 – 2

Flowering Stage
N – P – K
1 – 1 – 2

Final Flowering Stage
N – P – K
0 – 1 – 2

To translate this into a 12 week schedule for a typical Skunk type such as Cheese or Psychosis would give something along these lines:

Veg week 1: 3 – 1 – 2
Veg week 2: 3 – 1 – 2
Flo week 1 : 3 – 1 – 2
Flo week 2 : 3 – 1 – 2
Flo week 3 : 1 – 1 – 2
Flo week 4 : 1 – 1 – 2
Flo week 5 : 1 – 1 – 2
Flo week 6 : 1 – 1 – 2
Flo week 7 : 0 – 1 – 2
Flo week 8 : 0 – 1 – 2
Flo week 9 : 0 – 0 – 0
Flo week 10: 0 – 0 – 0

This schedule reduces the Nitrogen two weeks into the 12/12 period which will assist in stopping the vertical growth (stretch). It cuts out all Nitrogen after 6 weeks which will result in a less leafy, smoother burning end product with greater density to the flowers. The last two weeks of plain water is sufficient to leach out all accumulated salts and give a clean end product. Three week flush as advocated by some really isn’t necessary if the Nitrogen is cut out after 6 weeks. The people using a three week flush tend to use Canna nutes which have too much N in them for late flowering and this is why they get a benefit from flushing for three weeks.

Hope that makes sense. Despite all the crap the nute companies fill our heads with about the need for all kinds of fancy bottles, you really don’t need any of them. Cannabis is a simple plant, a weed in fact, and all it needs is the correct NPK at the correct time plus a full range of trace elements, that is hard fact and no amount of BS an marketing from the nute companies will ever change that fact.

Anyway Hope this helps you a little bit ? Good luck and Happy Growing

I back this statement up for sure! I have seen many experiments where people are trying to compare advanced nutrients to other nutes and this company has always clearly won. Mostly because their nutrients were developed from cannabis and not tomatoes. Maybe we should blend cheaper nutes to the AV’s npk ratios? I believe it would be their n-p-k ratios over anything else. They do also have a lot of boron probably for some good reason.

All of their nutrients schedules for the flowering stage, with additives or without, comes very close to 1-1-2-0.5 Ca-0.25 Mg. At the last two weeks, however, they have it closer to 2-3-4-1 Ca-0.6 Mg. And obviously a flush at the end.

Advanced Nutes seems to have a lot of amino acids, humic acid, sugars, and microbes too.

I also like that they don’t have calcium mixed with phosphorous and magnesium in concentration.

But I will stay away from them and mix up cheap, microbe friendly nutes using AV’s ratio’s.

There have been many people that say you need to use nutes that are designed for MJ, so what is the ideal NPK ratio for Veg and Flower? Many people say…

What’s the Best NPK Ratio for Cannabis Nutrients

What’s the Best NPK Ratio for Cannabis Nutrients?

If you’re new to growing cannabis or still in the beginning phases, trying to figure out the best nutrients for your cannabis plants can be very confusing. There are so many companies making and selling nutrients: each one creating multiple types of nutrients with different purposes. The most important thing is to make sure you give your marijuana plants the right amounts of nutrients at the right time. There are two main life stages for cannabis plants, vegetative growth & the flowering stage, each stage has different nutrient requirements.

For the best npk ratio, your cannabis plants need to use the NPK Ratio Guide
Where is this information? Most nutrient bottles display 3 numbers (“2-1-6” in the pic below) , often called N-P-K, which stands for Nitrogen, Phosphorus and Potassium

Why “K” for Potassium? The atomic symbol of Potassium is “K” from Neo-Latin kalium.

In other words, you want to use a “Vegetative” (high Nitrogen) or “general purpose” nutrient formula for the first stage of life known as the vegetative stage. If using high-quality soil, you can skip vegetative nutrients for the first 3-4 weeks while your plant uses up the nutrients in the soil, otherwise you should start with vegetative nutrients around the time your plant opens its first leaves.
Use a “Bloom” (low Nitrogen) nutrient formula with plenty of P & K for the flowering stage. Start using bloom nutrients when buds start forming to make sure your plant gets plenty of Phosphorus & Potassium, which are crucial to bud development.

NPK Phosphorus Ratio

Phosphorus tends to increase the number of flowers, while Potassium helps increase the bulk/weight of flowers. Be careful, though because going overboard with either one can burn your plants!

The main thing is to avoid giving too much Nitrogen in the flowering stage, as it can discourage bud development in the flowering stage and add an unpleasant taste to buds, which is why a general purpose plant nutrient isn’t a good choice in the flowering stage.
Cannabis Growers Secret: If you find yourself in an emergency need for nutrients: Nutrients made for “cactus” or “succulents” can be used in the cannabis flowering stage, because they usually have low amounts of N and plenty of P & K.

Note: Don’t use any type of time-released nutrients (like fertilizer spikes, or “slow release” Miracle-Gro soil) because they deliver too much N in the flowering stage and may reduce bud growth.

Cannabis needs plenty of P & K to grow big buds in the flowering stage.

Using the Best Cannabis Growing Nutrients is just the beginning! There are a few more things you need to know for optimal nutrient intake.
Check the pH of your water to prevent deficiencies. 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.

Optimum pH for cannabis plants..
Soil: 6.0 – 7.0
Coco Coir: 5.5 – 6.5
Hydroponics: 5.5 – 6.5

Checking the pH will make a huge difference to your grow by keeping plants vibrant and healthy. It only takes a few minutes each time you water your plants! If you get a digital pH pen, it only takes seconds to test your pH!

Learn more about pH & preventing nutrient deficiencies here!

Trying to find the best NPK ratio to grow cannabis? What nutrients should you use for your strain. Nutrients used to grow big marijuana buds.