BioScientific, Inc. | Maxi-K
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Maxi-K is a liquid foliar concentrate containing kelp (Ascophyllum nodosum) and humic and fulvic acids. Maxi-K is typically applied as a foliar but may also be applied to soil. See Use Instructions below.


Our humic and fulvic acids are extracted from Leonardite ore, a naturally oxidized lignite, using a strong base to liberate the humic and fulvic acids into a water-soluble form. We screen the liquid product through a 140-micron mesh screen to remove insoluble particles. Kelp is added to the liquid humic acids, thoroughly mixed and fine filtered again before readying for shipment. Our process results in a very potent humic acid level of 12% (6% CDFA method) combined with kelp.


Humic and fulvic acids as a foliar treatment:

In university studies, humic acids used as a foliar treatment have been shown to stimulate both root and shoot growth. Other research has shown foliar applications of humic acids resulted in higher plant respiration rates and an increase in chlorophyll in plant leaves. Humic acids added to soil provide the benefits of improved micronutrient uptake, increased root growth, increased microbial activity and improved cation exchange capacity (CEC).


Kelp as a foliar treatment:

Maxi-K includes a brown kelp (Ascophyllum nodosum) hand harvested from the North Atlantic. This kelp contains carbohydrates, minerals and trace elements and is a source of unusual and complex polysaccharides not present in land plants. Used as a foliar, kelp has been shown to improve root and shoot growth, improve resistance to both biotic and abiotic plant stressors and improve flowering and fruit set. Thanks to their organic matter and some nutrient content, seaweeds and seaweed extracts have been used as natural soil conditioners in agriculture for centuries.


Maxi-K Use Instructions:


Foliar application: Apply 2-3 gallons per acre split between all applications occurring from bud set through veraison. This generally begins a 12”-15” in shoot length and ends about 3 weeks before harvest.

Soil application: Apply 1-2 gallons per acre in the spring and fall.  Either application may be applied by irrigation injection, shanked or banded spray with our without fertilizer.

Trees (Fruit and Nut):

Foliar application: Apply 2-4 gallons per acre divided by the intended number of regularly scheduled spray applications as a part of the tank mix. Apply in 50-100 gallons of spray volume per acre to ensure thorough coverage. Applications should begin at petal fall and continue through sizing.

Soil application: Apply 1-2 gallons per acre through a micro-irrigation injection or by shanking or banding. These applications generally coincide with root flush.

Other Perennial or Annual Crops:

Foliar application: Apply 2-4 quarts per acre, three times, beginning at floral initiation.

Soil application: Apply 1-3 gallons per acre through the irrigation system divided evenly over the crop’s development.

Post-Harvest Trees and Vines:

Foliar application: Apply 2-4 quarts per acre in a single application with or without zinc.


For pricing and more information contact John Olivas (877) 424-6724 or