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Base A & B

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Making Growing Simple, Exciting, and Easier to Succeed At

Humboldts Secret “Grow & Bloom” is the world’s best base nutrient system. It contains a signature blend of Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, and more.

Product Information

About Grow & Bloom Base A + B

Our basic hydroponic grow nutrients pack a punch to ensure your plant life receives the nutrients it needs to flourish. Our signature blend of nutrients includes nitrogen, phosphorus, potassium, calcium, and magnesium, making it an ideal solution for rapidly growing your whole garden. The combination of our liquid nutrients for plants and vegetables makes growing simple and exciting. We recommend applying both solutions at equal rates at every watering for maximum results throughout the entire growing stage.

 Simply put, Base A & B ensures the optimal health of your greenery, wherever they are and whatever they’re growing in. Our two-part base system is both commercial-grade and garden-friendly, ensuring the optimal health of your plants and flowers. It’s made from quality ingredients that are 100% water soluble and pH-balanced for ease of use.

 Order our Base A & B
system today!

Base A & B Feed Chart

Mixing Procedure

1) Fill your reservoir with water.  It may be filtered or tap water.  If you use filtered water you may need to add some CalMag & Iron.

2) Add HUMBOLDTS SECRET NUTRIENTS listed on the feed chart (Shake each bottle a little bit)

3) After you add your nutrients, adjust the PH so that your end mixture in your reservoir is between 5.5 and 6.5 (If needed.)

4) Can be used in Soil, Coco, Deep Water Culture (DWC) and Aeroponics.  Typically less nutrients are used in DWC. If you grow in Hydroponics it is recommended that you use  Golden Tree at a lower dose and use Plant Enzymes. We suggest you play around with the amounts of each nutrient and find out what works best for your setup as there are many variations to growing.

Additional Information

1) In order to have a successful grow growers should use at minimum Base A, Base  B & Golden Tree. 

2) For Veg: Add 1-2ml of Golden Tree per gallon to your reservoir. Then, add your base nutrient until PPM levels of the reservoir mixture reaches between 800-1000 (Hanna Scale)

For Flower: Add 2-5ml of Golden Tree, then add base nutrient into your reservoir  until your PPM levels of the reservoir mixture reaches between 1000-1300 (Hanna Scale, which is 2.0-2.6 in EC.) Remember that this is a rough estimate. Strains and growing mediums vary, some will enjoy higher PPM's and some lower.  Flushing at the end is not necessary.

Shake Base A then measure out between 5-14mL per gallon of water.

Dilute Base A into a full watering can or reservoir and stir to thoroughly combine.

Shake Base B and measure out an equal portion, dilute into the same watering can or reservoir and stir to thoroughly combine

Apply your nutrient solution to the soil, or use as a foliar spray. For optimal results feed with every watering throughout your entire grow cycle.

We are confident that you will be pleased with your product and offer a 6 month 100% satisfaction guarantee.

Refer to our return policy for full terms for the satisfaction guarantee.

Frequently Asked Questions

NO. Base A and B should never be combined in their concentrated form as nutrient lock out will occur. Always dilute A and B into water.

You should start with Golden Tree, then Base A followed by Base B. Then you can add the remaining nutrients. Make sure to mix your solution thoroughly before adding the next one.

Humboldts Secret Supplies Base A and Base B are meant to be used together throughout your entire grow cycle, from beginning to end.

You should use 5-14mL of each Base A and B, in equal proportions. I.e. If you use 8mL of Base A, you will also use 8mL of Base B.

You do not, but it is recommended to have these nutes in your growing
system. You can use Base A & B with every watering or every other
watering, but do not exceed more than 3x per week when using Golden

We sell products individually so that every customer can customize
their order to the sizes they need. However, we do offer them in our
Starter Kits.

Customer Feedback

Don’t just take our word for it..

Rated by hundreds of happy growers

Grow bigger plants in less time without struggle

Get the Startaer Kit for only $170.77 $99.99

Each Starter Kit Includes:

  • World's Best Base Nutrient System Grow & Bloom Base A and B (1/4 Gallon of Each)
  • Golden Tree (1/8 Gallon)
  • Flower Stacker (1/4 Gallon)
  • CalMag & Iron (1/4 Gallon)
  • Plant Enzymes (8 Ounces)
Customer Reviews
4.9 Based on 228 Reviews
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Filter Reviews:
Marty C.
United States United States

So Far So good

Its a first for me ,but so far the results look like they are working! I'll be reordering for sure! Cheers Mates!!!

Mary Z.
United States United States

It is ok

It is ok.

United States United States


I am into hydroponic. I'm interested in year round herbs. Now using Hombolts for fertilizer for my house plants. They are doing terrific. Try it.


worked really well

Easy instructions and the plants loved it.

Gary W.
United States United States

This stuff works worth the price tag period

Amazing item