Best Nutrients & Fertilizers of 2022 for Marijuana Flowering Stage

by Morgan

November 28, 2021

How To Choose The Right Lighting For Your Marijuana Grow Room
Product
General Hydroponics General Organics...
Maxicrop MCSP10.7OZ 1025 Soluble Powder,...
CANNA CA1260+CA1270 Coco A & B, 1 L, Set...
Flower Fuel 1-34-32 - Bloom Booster by...
Picture
General Hydroponics General Organics...
Maxicrop MCSP10.7OZ 1025 Soluble Powder,...
CANNA CA1260+CA1270 Coco A & B, 1 L, Set...
Flower Fuel 1-34-32 - Bloom Booster by...
Nutrient Ratio
2-4-4
0-0-17
4-0-1(Coco A) 0-4-2 (Coco B)
1-34-32
Stage
Flowering stage
Suitable for all stages
Growth and flowering stages
Flowering stage
Usage
All mediums
Wide range of applications
Coco Coir
Soil, coco, hydroponic and aeroponic systems
Product
General Hydroponics General Organics...
Picture
General Hydroponics General Organics...
Nutrient Ratio
2-4-4
Stage
Flowering stage
Usage
All mediums
Check Price Now
Product
Maxicrop MCSP10.7OZ 1025 Soluble Powder,...
Picture
Maxicrop MCSP10.7OZ 1025 Soluble Powder,...
Nutrient Ratio
0-0-17
Stage
Suitable for all stages
Usage
Wide range of applications
Check Price Now
Product
CANNA CA1260+CA1270 Coco A & B, 1 L, Set...
Picture
CANNA CA1260+CA1270 Coco A & B, 1 L, Set...
Nutrient Ratio
4-0-1(Coco A) 0-4-2 (Coco B)
Stage
Growth and flowering stages
Usage
Coco Coir
Check Price Now
Product
Flower Fuel 1-34-32 - Bloom Booster by...
Picture
Flower Fuel 1-34-32 - Bloom Booster by...
Nutrient Ratio
1-34-32
Stage
Flowering stage
Usage
Soil, coco, hydroponic and aeroponic systems
Check Price Now
Product
J R Peters Inc 51024 Jacks Classic...
Fox Farm FX14049 Liquid Nutrient Trio...
Grow More 7508 Hawaiian Bud 5-50-17,...
Dyna-Gro DYNAGB8OZSET Liquid Grow &...
Picture
J R Peters Inc 51024 Jacks Classic...
Fox Farm FX14049 Liquid Nutrient Trio...
Grow More 7508 Hawaiian Bud 5-50-17,...
Dyna-Gro DYNAGB8OZSET Liquid Grow &...
Nutrient Ratio
10-30-20
2-8-4 (Tiger Bloom), 6-4-4 (Grow Big), 0.01-0.3-0.7(Big Bloom)
5-50-17
7-9-5 (Grow), 3-12-6 (Bloom)
Stage
Flowering stage
Late season fruiting and flowering
Late stages
Vegetative and Flowering
Usage
Water-soluble (can be used on roots, leaves, or hydroponic systems)
Soil, Hydroponics, and soilless systems
Hydroponic method
Soil, coco coir, and hydroponics
Product
J R Peters Inc 51024 Jacks Classic...
Picture
J R Peters Inc 51024 Jacks Classic...
Nutrient Ratio
10-30-20
Stage
Flowering stage
Usage
Water-soluble (can be used on roots, leaves, or hydroponic systems)
Check Price Now
Product
Fox Farm FX14049 Liquid Nutrient Trio...
Picture
Fox Farm FX14049 Liquid Nutrient Trio...
Nutrient Ratio
2-8-4 (Tiger Bloom), 6-4-4 (Grow Big), 0.01-0.3-0.7(Big Bloom)
Stage
Late season fruiting and flowering
Usage
Soil, Hydroponics, and soilless systems
Check Price Now
Product
Grow More 7508 Hawaiian Bud 5-50-17,...
Picture
Grow More 7508 Hawaiian Bud 5-50-17,...
Nutrient Ratio
5-50-17
Stage
Late stages
Usage
Hydroponic method
Check Price Now
Product
Dyna-Gro DYNAGB8OZSET Liquid Grow &...
Picture
Dyna-Gro DYNAGB8OZSET Liquid Grow &...
Nutrient Ratio
7-9-5 (Grow), 3-12-6 (Bloom)
Stage
Vegetative and Flowering
Usage
Soil, coco coir, and hydroponics
Check Price Now

Best Marijuana Fertilizer for optimum bloom - JR Peters Inc 51024 Jacks Classic No.1.5 Blossom Booster Fertilizer

Best all-in-one Fertilizer for marijuana plants - Fox Farm FX14049 Liquid Nutrient Trio Soil Formula

Best Budget Fertilizer: General Hydroponics GH5132 BioThrive Bloom

Comparison Of Our Top Pick of Fertilizers

JR Peters Inc 51024 Jacks Classic No.1.5 Blossom Booster Fertilizer
  • Can be fed through roots and leaves
  • Used in flower beds, containers, and hanging plants
  • Water-soluble

CHECK CURRENT PRICE

Fox Farm FX14049 Liquid Nutrient Trio Soil Formula
  • Simple step-by-step formula
  • Best for late season use
  • Boosts the nutrient value of soil
  • Heals root systems
  • General Hydroponics GH5132 BioThrive Bloom

    General Hydroponics GH5132 BioThrive Bloom

  • Balanced organic blend
  • Boosts all growth phases
  • Can be used in hydroponic or soil mixes
  • Want your Cannabis plants to yield better? It’s not rocket science, but the research involved in finding the right nutrients certainly is.

    That’s why we’ve done the nutrient research for you! In this article, we’ll take you through a comprehensive list of the best nutrients for the Marijuana flowering stage and some of the best fertilizers that feature them. Read on for more.

    Best Nutrient Fertilizers of Marijuana Flowering Stage

    Organic Fertilizers

    Organic fertilizers are made with plant-derived substances, animal waste, or mineral sources. These are more eco-friendly and might work slower than chemical fertilizers.

    Recommended
    General Hydroponics GH5132 BioThrive Bloom
    1. An organic blend of plant extracts, cane sugar, glacial rock powder, potassium sulfate, alfalfa meal, zinc phosphate, sodium borate, rock phosphate, rock powder, copper sulfate, iron sulfate, sodium, molasses, kieserite, soybean meal, and manganese sulfate
    2. Helps marijuana plants grow to their optimal strength by stimulating microbial activity in the root zone
    3.  Can be used in an indoor hydroponics system or soil mixtures

    CHECK CURRENT PRICE

    Pros

    • Organic
    • Improves the microbial activity in the roots
    • Quick results
    • Great price

    Cons

    • Unpleasant smell

    Consumer Review

    “This is a must have for anyone serious about their plants development and care about using only organic nutrients.” — Cass Young

    Maxicrop Pure Seaweed Extract Soluble Powder
    1. Made from the Norwegian Ascophyllum nodosum seaweed
    2. Certified organic fertilizer that stimulates the growth of the plant in the stem and root
    3. One product to help with all stages of plant growth

    CHECK CURRENT PRICE

    Pros

    • Good quality
    • Fixes deficiencies
    • Dissolves well in water
    • Potent

    Cons

    • Fishy smell
    • Needs quantity adjustment depending on the application
    • Expensive

    Consumer Review

    "This stuff is amazing. I first started using it on my orchids, but now I feed all my other houseplants with it too. They clearly LOVE it. New growth & spikes galore!" — CantankerousWino 

    Synthetic Fertilizers

    Synthetic or Chemical fertilizers are made for a simple application in precise amounts. Chemical fertilizers are made to give you immediate results - at the cost of environmental degradation over time.

    Canna Coco
    1. A great option for those planning to grow cannabis in coco coir
    2. Easiest ways to get high-yield, healthy marijuana crops
    3. Best for beginners

    CHECK CURRENT PRICE

    Pros

    • Easy to use
    • Best for beginners
    • Long shelf life
    • A wide range of applications
    • Variety of nutrients

    Cons

    • Too diluted
    • Too expensive

    Consumer Review

    “Some of the Best Nutrients on the Market & Made for Dummies” — Ryan Hoffmire

    Flower Fuel
    1. 100% hydroponic grade, synthetic fertilizer
    2. Contains over 40 ingredients
    3. Contains all micro and macronutrients needed
    4. Soluble bloom fertilizer
    5. Works with a range of base nutrients

    CHECK CURRENT PRICE

    Pros

    • Higher yield of quality flowers
    • Useful for boosting the acidity of the soil

    Cons

    • Acidic
    • Confusing instructions
    • Expensive

    Consumer Review

    "I ran out of shooting powder during the blossom stage and took a chance with this product. I cut the dosage in half, one scoop instead of two, just to be cautious. Within 2 days the flowers had doubled in size, filling in sparse sections without any ill effects." — Homebody Grams

    JR Peters Inc 51024 Jacks Classic No.1.5 Blossom Booster Fertilizer
    1. Favorite among cannabis planters
    2. Made for the flowering stage in particular.
    3. Can be used on plants indoor and outdoor
    4.  Can be fed through the roots of the leaves

    CHECK CURRENT PRICE

    Pros

    • Easy to use
    • Effective for blooms

    Cons

    • Too strong for certain plant varieties  

    Consumer Review

    "With the ridiculous prices of nutrients for growing cannabis; I figured I would give this a try. I have been using this product for over a year now and have had stellar results for a fraction of the cost of using mainstream nutrients." — Mark Hodges

    Fox Farm FX14049 Liquid Nutrient Trio Soil Formula
    1. ‘Big Bloom’ contains organic ingredients
    2. Complete kit with a solution for every stage of plant growth.
    3. Most useful for growing flowers and fruit late in the season and on mature plants

    CHECK CURRENT PRICE

    Pros

    • Easy to use
    • Effective
    • Great overall growth
    • Cost-effective

    Cons

    • Too strong
    • Needs pH adjustment

    Consumer Review

    "I will use Fox Farm for my MMj, until end of products, or end of days, Last I knew, Fox Farm was doing just fine. I've grown both indoor and outdoor mmj, using solely Fox Farm nutrients." — Mike B.

    Grow More 7508 Hawaiian Bud
    1. Suitable for growing cannabis with the hydroponic method
    2. Best for use in the later stages of flowering to increase yield size

    CHECK CURRENT PRICE

    Pros

    • Effective for the flowering stage
    • Dense buds
    • Easy to use
    • Potent

    Cons

    • Instructions need to be adjusted

    Consumer Review

    "I'm pleasantly surprised how well my plants responded. Great Product! Does what it's supposed to. Would highly recommend to experienced grower!"— James

    Dyna-Gro Grow + Bloom
    1. Made to help with your plants’ vegetative and flowering stages
    2. Can be used in soil, coco coir, or even hydroponic applications
    3. Contains all the micro and macronutrients necessary for the growth of the plant 

    CHECK CURRENT PRICE

    Pros

    • Increased blooms
    • Cost-effective
    • Easy to use for beginners

    Cons

    • Dosage needs to be adjusted

    Consumer Review

    “I decided to use this for my first home grow. Very easy to use.” — Michael S.

    Best Nutrients for Marijuana Flowering Stage

    Now that we’ve taken a look at the actual products, let’s talk about some basic elements that pretty much any grower needs to keep in mind.

    These are carbon, oxygen, and hydrogen. Since these elements are easily available through the air and water, there is no need to add them separately.

    However, care should be taken to ensure your plants get plenty of air and water and in the right quantity and quality. If you grow your plants in indoor tents, then you need to aerate them well. Check if the water being fed is safe. Use a filter if you need one or store the water for 24 hours to allow the chlorine to evaporate before you use the water.

    You can also check out our guides to find the perfect indoor tent or carbon filters for your plants.

    Now, let’s check out the nutrients that you need to add to your plants’ diet for better flowering.

    Primary Macronutrients

    Phosphorus

    Phosphorus is a key nutrient responsible for energy transfer in plant cells. In marijuana, it helps with the development of the root, flower, and seed. Therefore, it is the most important nutrient during the initial stages of the flowering stage.

    When used in the right amount phosphorus can help you grow large healthy buds on your marijuana plant.

    Another task of phosphorus is to make other nutrients available for the plant to absorb.

    Nitrogen

    Nitrogen is essential for plants to carry out the process of photosynthesis properly. This helps the plant develop its green foliage.

    It also helps in the production of proteins that are building blocks in the plant. Therefore, nitrogen is required throughout the life cycle of the plant. The stage it is needed the most is the vegetative and bud forming stages.

    Potassium

    Potassium helps regulate the salt and water concentrations in plants. It does this by controlling the uptake of water, carbon dioxide, and oxygen. This role makes potassium an essential macronutrient for your plants’ overall health.

    What is NPK?

    NPK is not a nutrient but an acronym for the combination of nitrogen, potassium, and phosphorus. These are the essential macronutrients.

    Many fertilizer products will have an NPK rating. This is used to determine how much the quantity of each nutrient is in the mix.

    The requirement quantities of these nutrients change during various stages of marijuana growth and hence must be adjusted accordingly.

     

    Secondary Macronutrients

    Calcium

    Calcium helps in the transport of nutrients by keeping the structure of cell walls together. It also helps in the production of plant tissues and the absorption of other nutrients. Thus, allowing the plant to grow and develop normally.

    Magnesium

    Magnesium is an essential component of the chlorophyll molecule. It helps with the growth of the plant. Thus, a lack of magnesium results in stunted plants. However, excess magnesium is just as harmful to plants.

    Sulfur

    Like magnesium, sulfur also aids in the growth and development of the plant. It aids in the plant metabolism, transpiration, and transportation of chlorophyll. Thus, a sulfur deficiency results in the yellowing of new leaves.

     

    Secondary Micronutrients

    Zinc

    Zinc helps metabolic reactions in plants and is a key component in various enzymes. Zinc helps in the development of stems, leaves, and branches. The presence and requirement of zinc increases as the plant grows.

    Zinc also helps plants withstand colder temperatures.

    Boron

    Boron helps in the absorption of calcium. It is also used in the synthesis of the cell wall. Boron requirement particularly increases during the reproductive stages. It also helps in the development and growth of root tips and the transfer of sugars in the plant cells.

    Manganese

    Manganese is vital during the chlorophyll production and photosynthesis processes. It also activates enzyme interactions.

    Molybdenum

    Molybdenum helps process nitrogen by aiding the conversion of nitrate into nitrite and then into ammonia and amino acids. Without molybdenum, your plant can become nitrogen deficient.

    Iron

    Iron is needed by plants for a variety of biological functions. These include chlorophyll production, enzyme production, nitrogen-fixing, metabolism, and development.

    Copper

    Copper helps with the development of plant proteins. It activates enzymes and also catalyzes reactions that promote plant growth. Thus, helping strengthen the branches and stems of the plants.

    The Flowering Stage of Marijuana Plants

    The flowering stage of a marijuana plant is generally eight weeks long, but different variants may have shorter periods as well.

    Plants grown indoors are easy to control. Here’s a guide for growing marijuana plants indoors in soil.

    With indoor plants, you can start the flowering process after 4 weeks of vegetative growth. However, plants grown outdoors will only start flowering at the end of summer.

    Since the flowering process starts when the plants receive less light than normal. This helps the plant to grow buds. Along with lighting, other factors also influence the flowering process in Marijuana plants. These factors are the availability of nutrients,  environmental conditioning, and pH balance of the medium.

    pH for Marijuana Flowering

    pH is the measure that tells you how alkaline/acidic a solution is. In this case, the solution is the soil you are growing your marijuana in - and it can have a major effect on the health of your crops.

    Maintaining optimum pH levels is as important as supplying essential nutrients. Without the right pH levels, the marijuana plant is unable to absorb nutrients from the soil or water.

    The pH scale ranges from 0 to 14. Solutions with a measure below 7 are all acidic whereas, solutions above 7 are basic/alkaline.

    The ideal pH range for growing a marijuana plant is between 6.0 and 6.5.

    You should also do an analysis of the soil/medium your Cannabis grows in and the water you’re feeding it. Especially if you plan on growing a large output of marijuana.

    You can also buy some supplements to help the absorption of nutrients and increase the natural resistance of the plant against diseases.

    The Cal-Mag Plus is one supplement that helps you fix deficiencies in plants. It contains fortified calcium, magnesium, and iron. You can use it as a foliar spray, with coco coir, container plants, or soil plants.

    The Big Bud is another advanced liquid fertilizer containing L-amino acids and phosphorus potassium. It is a reliable solution that can be used when you want to increase the harvest size and quality.

    Stats Table

    Check out our table below for the nutrient ratios of the organic fertilizers.

    Note: The nutrient ratio indicates the proportion of three macronutrients; nitrogen, phosphorus, and potassium in every pack of fertilizer mix.

    Final Thoughts

    Growing marijuana is something of a combined art and science that takes lots of effort. However, having the right knowledge and applying it properly can certainly help - especially when it comes to nurturing your beloved buds.

    We hope our guide to the best nutrients for the marijuana flowering stage helps you grow a great output.

    FAQs

    1. What fertilizer is used for Marijuanas?

    Organic growers use compost, mulch, or green manures to add nutrients to the soil. Synthetic fertilizers are not recommended for organic cannabis production, as they can leave residues that can be harmful to users.

    2. What is the best fertilizer for big buds?

    The best fertilizer for big buds will vary depending on the specific needs of the plant. However, a good general rule of thumb is to use a high-nitrogen fertilizer to help promote vegetative growth, and then switch to a high-phosphorus fertilizer once the buds start to form.

    3. What is the best fertilizer for flowering stage?

    For the flowering stage: Fertilizers that have a lower % of nitrogen (nitrogen), but a higher % of phosphorus (phosphorus) and potassium (potassium). An example would be NPK 5-9-9. All fertilizers contain different amounts of nutrients.

    4. How much nitrogen is needed for flowering?

    Nitrogen is an essential nutrient for plants and is necessary for flowering. The amount of nitrogen needed varies depending on the plant, but typically a moderate amount is sufficient. Too much nitrogen can actually inhibit flowering, so it's important to be mindful of how much you're adding to your garden.

    5. Which NPK ratio is best for flowering plants?

    According to studies, the ideal NPK fertilizer ratio for flowering plants is 3-1-2. (That's 3% Nitrogen, 1% Phosphorus, and 2% Potassium.) So look for that ratio on the label of packaged fertilizers; anything close to a 3-1-2, a 6-2-4, or a 9-3-6 should be ideal.

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    About the author 

    Morgan

    I discovered the benefits of Cannabis at a young age in 2002, with years of trial and error, my knowledge grew just like my plants. As my love for cannabis unfolded I began to teach and learn, trying to gain as much information and practical growing experience.

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