Search
Close this search box.

Best Fertilizer for Cannabis in 2024 | Boost Your Cannabis Growth with BiG Plant Science

How to choose the best fertilizer for cannabis?

Cannabis needs light, oxygen, carbon dioxide and nutrients to grow. Fertilizers can consist of many organic and inorganic elements. Cannabis plants will need different proportions of these elements depending on the growth stage.

We recommend you, the growers, to choose a fertilizer designed specifically for cannabis plants. It is usually the easiest and the most efficient choice. BiG Plant Science fertilizers made for every step of growing cannabis, from the beginning to the end of your plant’s growth.

Does Cannabis Need Fertilizer to Grow Big Buds?

To get big buds, you need the right set of nutrients during the flowering phase. Flowering cannabis plants need plenty of potassium, but less nitrogen than before. Elements such as calcium and magnesium helps to produce dense buds.


Big Plant Science Bloom, Flower Explosion and Aroma Boost is blended to the specific nutritional needs of cannabis during flower. Helping you get those big, thick, sticky buds with great taste and aroma.

What Nutrients Does Cannabis Need to Grow?

All plants need the same types of nutrients, but each plant has specific preferences for the nutrient ratios depending on its current needs. For your marijuana plants, it’s advisable to use a fertilizer containing all the major nutrients: nitrogen, potassium, and phosphorus.

In addition to these major nutrients, there are other essential elements required in smaller amounts. Our Products provides all these vital nutrients for cannabis plants, including magnesium, sulfur, boron, copper, iron, manganese, zinc, molybdenum, and calcium.

Our additives, such as Aroma Boost, Stimulus, and Flower Explosion, also contain biologically active ingredients such as amino acids, carbohydrates, and B1, B2, B3, B5, and B6 vitamins.

Why & How did We Create BiG Plant Science?

BiG Plant Science is created by a master grower and Chemist in Denmark 12 years ago. When he first started growing cannabis he was overwhelmed by all the different types of fertilizers at the garden centers and grow shops.

Hundreds of fertilizer bottles with big promises like “60% bigger juicier buds”, complicated feeding schedules, and with prices that can make any mistake very expensive.

He knew it had to be simpler than all that, so he decided working his own formula.

Cannabis is not so different from other edible plants in your garden, such as tomatoes. The trick is to give the plant what it needs to support and sustain optimal growth from the beginning. You want to build a strong root system and a strong, stress free plant to support all the dense buds that will eventually grow.

We made a two-part system to make growing cannabis simpler. BiG Plant Science Grow, Calcium Plus and Stimulus for building resilient root and shoot systems, strong stalk and faster growth. Then, BiG Plant Science Bloom, Aroma Boost and Flower Explosion helps facilitate flower production and taste.

Upon coming to Thailand to engage in cultivation, we were shocked by the fertilizer prices, and importing them from Europe or America proved to be a challenging task.

Whether you’re an indoor grower, where fertilizers represent the second significant expense after electricity, or an outdoor grower, where it becomes the most substantial cost, the high prices initially made it seem challenging to keep the business going sustainable.

After discussions regarding licenses and production permits with the Thai government, we made the strategic decision to shift our production operations here and built a production facility in Phitsanulok.

Initially, this move was aimed at satisfying our own needs. Subsequently, our goal is to extend the benefits to you, the Thai growers, by providing access to premium fertilizers at more affordable prices.

But fertilizer is only one part of the puzzle. We also assist our growers with personalized help and regular updates to this blog. Here you will discover helpful tips for growing good weed whether you’re an absolute beginner or seasoned cannabis grower.

What Are The Major Nutrients (N-P-K)?

When picking up nutrients, check the fertilizer package for three numbers on the front. These numbers represent the ratio of the three major building blocks for plant growth; Nitrogen, Phosphorus, and Potassium.

The key ingredients for happy and healthy plant growth!  This is the NPK ratio. The “N” and “P” stands for nitrogen and phosphorus, the K represents potassium.

Nitrogen plays an important role in cannabis plant growth, helping to develop new leaves and branches during the vegetative phase. During the flowering period, nitrogen plays a much smaller role, while higher amounts of phosphorus and potassium are needed to help bud/flower development.

What Are Macro and Micro-Nutrients For Cannabis?

Plants need 17 important nutrients to grow, and Nitrogen, Phosphorus, and Potassium are like the big three! We call them macro-nutrients. There are also smaller ones called micronutrients, like Calcium, Magnesium, Iron, Manganese, and Copper. These are just as important, but plants need them in smaller amounts.

Which fertilizer works well for Cannabis?

The best nutrient for marijuana growers is the one that best meets the requirements of your situation. Going completely organic and making your own compost teas and soil mixes will result in tasty and healthy plants, but will require a lot of space, time and experience to implement these techniques.

Using a synthetic marijuana fertilizer like BiG Plant Science makes it easier to guarantee your plants are getting what they need with very little oversight. It’s also cheaper and easier to apply. And according to our experiences not any completely organic fertilizers can grow bigger and denser buds then synthetic fertilizers.

Synthetic nutrients are sometimes called “chemical”. In some circles the word chemical has a negative stigma around it, which is silly. All nutrients are chemical in nature, water is a chemical. “Organic” nutrients are made from natural sources like potash and compost that are broken down and applied to plants.

Synthetic fertilizers are further processed so they are more concentrated, they are also faster acting since they take way less time to break down than organic. Be careful with fish based nutrients, they can sometimes have high heavy metal counts.

What Are The Advantages of Using Liquid Fertilizer for Marijuana?

Fertilizers are available in either liquid or powder form, and the choice between them depends on the preference of the grower.

Powder fertilizers are convenient for shipping and transport as they are not pre-mixed with water. Growers using powder fertilizers need to weigh and adjust the ratios, mix them with water, and ensure accurate preparation.

On the other hand, liquid fertilizers, although more expensive to ship due to their pre-mixed nature, offer the advantage of convenience. They eliminate the need for growers to mix multiple products together for plant feeding.

With liquid nutrients, a few milliliters mixed into water save growers time, eliminate guesswork, and reduce the chance of mistakes.

How Much BiG Plant Science Fertilizer Does A Cannabis Plant Need?

The amount of food your plants need depends on a few outside factors. Naturally large cannabis plants will need more nutrients than smaller ones. Pot size is a good indicator of how big a plant is likely to grow. Cannabis grown in soil outdoor can grow very tall since their roots can go deep into the ground.


You need to feed your cannabis plants with enough fertilizer so that the soil around the roots is completely saturated. A small pot may only need 2 liters of water with each feeding, while a plant in a 40-liter pot will need more water to be fully saturated.

Read the BiG Plant Science Feeding Chart carefully and follow what it says when it comes to recommended doses. We also have a calculator in our website to help you decide how much you need for your grow project!

How often do I give fertilizer or water?

This depends on the grower preference, but in general you want to be feeding your marijuana at least three times a week. We recommend feeding plants with BiG fertilizers every time you give them water as needed, this keeps it super simple.

Always check Ph and Ec levels after adding fertilizers to your water. We have all the recommended Ec and Ph levels on our feeding chart.

Some big plants will need a feeding every few days. It depends on the needs of the individual plants.

What’s The Feeding Schedule for Cannabis?

All growers should use the instructions on their cannabis fertilizers as a guide. They will give you the best recommendation on the feeding schedule. The Big Plant Science schedule is a gradual approach.

Start low and increase the dose every week until you get to full dose. This helps prevent any fertilizer burn, and starting with lower doses at the beginning of plants life helps reduce nutrient buildup.

What Else Do I Need To Know About Cannabis Fertilizer?

Is Too Much Fertilizer Harmful?

It can be easy to overdose it with fertilizer products, but using more than your plant can absorb will cause you problems. Depending on the size of your plant and the environment it is in, there is a limited amount of nutrients it can metabolize in a given period of time.

Using too much fertilizer can cause nutrient burn and symptoms of excess or deficient nutrients. If you over-fertilize, it is not the end of the world.

Can Nutrients Make Cannabis Taste Bad?

Many growers will tell you that if a marijuana plant is not properly flushed before harvest, it will develop a harsh flavor that doesn’t taste good when rolled into a joint. Flushing can be a factor, but perhaps a minor one.

If the cannabis is dried too quickly or not enough, it will definitely develop a bad taste. A lot of harsh flavors come from chlorophyll which slowly breaks down during the curing process.

What’s The Difference between Organic Fertilizer and Synthetic Nutrients?

Organic foods come directly from a natural source. Synthetics are produced from natural sources but are further processed to make them more concentrated.

If you compare the NPK ratios of organic and synthetic fertilizers, you will notice that the numbers are higher in synthetic fertilizers. This is because of the higher concentration resulting from the extra processing.

Organic nutrients are slowly broken down by the root system. It takes some time before the plants can access the nutrients.  An example of organic fertilizer is compost tea, which is made by soaking a permeable compost bag in a large container of water.

Synthetic nutrients are immediately available to plants and can give them a really noticeable boost in growth. Synthetic is usually cheaper and easier to use, but care must be taken not to over-fertilize plants.

How Do I Use Compost and Worm Castings as Fertilizer?

There are so many great things you can add to your soil that will help boost growth and flavor. Vermicompost is basically worm poop, there is also bat guano (also poop) and sheep manure (yes poop too), all of which are great to add to your marijuana growing soil.

Compost tea can be made by filling a permeable bag (potato sack) with manure and other compost and then soaking it in a large container of water. The water, now full of nutrients, can then be given to your marijuana plants.

Usually you mix the compost with potting soil or a soilless mix such as coconut or peat moss.

You can also add other things that are not compost but benefit the roots. Adding perlite will help the soil retain oxygen and water.

Find out how much nutrients you need for your grow

BIG Plant Science - Thailand

Our products are available in our webshop and on Lazada!

LATEST ARTICLES

Share this article

BIG Plant Science - Thailand

CONTACT BIG PLANT SCIENCE

We are here to help, contact us with any questions you might have!