Beneficial Bacteria – Custom B5

 Beneficial Bacteria and Soil Amendment

Improve your Garden Soil!

beneficial bacteria

Concentrated Liquid Probiotic and Biofertilizer

The beneficial bacteria in Custom B5™are highly concentrated and a microbial soil amendment product. B5 is designed to improve soil conditions, improving both soils for gardening and soils for farming.

Here’s some great new videos that show the advantages of using beneficial bacteria.

Grow bigger, better plants. Use Custom B5! Use Biofertilizers like !

Custom B5 improves Soil Conditions

Custom B5™ contains 5 specifically selected species of beneficial soil bacteria including Bacillus subtilis.

Buy Custom B5 Now

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The root system is the gateway to growing bigger, healthier plants. Custom B5™, biological soil amendment, helps plants grow healthier root systems and bigger and better plants.

Here’s some great new videos that show the advantages of using beneficial soil bacteria.

The Beneficial Bacteria of Custom B5

Custom B5™ contains 5 specifically selected species of beneficial soil bacteria. These beneficial microbes and soil probiotic have been selected because of their enhanced ability to:

  • Decompose organic matter to create extra nutrition for your plants.
  • Grow bigger, healthier root system enabling the plant to grow larger and more abundant fruits or vegetables.
  • Help produce plant hormones
  • Restore Biotic Balance
  • Process nutrients more effectively
  • Replace beneficial bacteria lost to drought, flooding or freezing.

Custom B5™ is a highly concentrated, liquid microbial product manufactured and distributed by Custom Biologicals.

Custom B5™ contains the following beneficial soil bacteria:

  • Bacillus subtilis
  • Bacillus laterosporus
  • Bacillus licheniformus
  • Bacillus megaterium
  • Bacillus pumilus

Custom B5 is available in two convenient sizes; 50ml and 1 Liter. The 50 ml size contains enough beneficial soil microbes to treat 2.5 acres (1 Hectare). The 1 liter size will treat 50 acres (20 Hectares).

Custom B5 can be purchased in our online store.

Distributor and dealer inquires, both domestic and international, are welcome. 

Custom B5 is also available as a fast dissolving fizzytab. B5 Fizzytabs, an effervescent tablet, contains the same beneficial soil bacteria, but in a easy-to-use fertilizer tablet. Each fizzy tablet treats 1/4 acre and can be applied as a seed treatment, or after the plant has germinated.

Custom Biologicals, Inc. manufactures a wide variety of biological products including products for soil amendment. Contact Custom at (561) 797-3008 or via email at

Microbial soil amendments are sometimes called biofertilizers, biological soil amendments, biostimulants, or beneficial microbe treatments. This product is useful for home and lawn care, gardening, as well as for commercial farms.

We’re always looking for new distributors, both domestic and international.

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  1. gill pedwell says:

    can this product help with soil which contained a palm infected with fusilarium wilt now removed and burnt

    1. MrBill says:

      Gil – Thanks for your inquiry. Our products are primarily for growth promotion. We have worked with Palm Trees with great success. Thanks again. Bill

    2. gill pedwell says:

      How do you recommend applying your product. Do we dilute it with water ? What are the proportions for applying to say an orchard?

      1. MrBill says:


        Thanks for your interest in Custom Biologicals’ products. We have product specific application on our website – here.

  2. Peter says:

    Hi there, i am struggling to understand how there is enough bacteria in 50mls of liquid to cover a Ha? I know it must be diluted and that the bacteria must multiple…. Can you please explain the process.

    1. MrBill says:

      Great question.

      We’re not trying to add enough bacteria to complete the job. We’re trying to add enough bacteria to start the job. Remember that bacteria are alive and multiply very rapidly. Under ideal conditions they can multiply as fast as every 20 minutes. Our bacterial and fungal products are essentially seeds. We count on the microbes growing, multiplying and thriving in the soil.

      As for the numbers, B5 has 1 x 10(8) bacteria per ml. This is 100,000,000 per milliliter. For the 50 ml bottle this means 5,000,000,000 or 5 billion bacteria. This is more than enough bacteria to colonize one hectare of farmland.


  3. ahmad shauki bin ismail says:

    i would like to try your products for:
    1. durian trees;
    2. rubber trees;
    3. rice crops; and,
    other tropical fruits.

    1. MrBill says:

      Yes, all of our microbial products work well on the crops you mention. Contact me at for more information.

  4. Lee James says:

    Are there specific bio mix to assist in the breakdown of clay soils? I have a great deal of dead and dying Ash trees. Is there a mix to help breakdown sawdust/wood chips into a product that can be used to assist with clay soil? Brown biomatter, leaves, twigs to compost accelerant?

    1. MrBill says:

      Lee – Our Biota Max will help break down the ash trees. It contains 4 types of Trichoderma fungi. Trichoderma will break down the woody material in the ash trees returning the nutrients to the soil.

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