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1 Lb TeraVita SP-90 Humic Acid 100% Soluble Powder

100% Soluble - TeraVita Humic Acids help with improving seed germination, root initiation, uptake of plant nutrients and can serve as sources of N, P and S.

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TeraVita 100% Soluble Humic Acid Powder - 1 Pound

  • 1 Pound Resealable Bag 
  • TeraVita SP-90 is soluble humate powder (soluble salts of humic acids) that contains a minimum of 90% humic acids by dry weight.
  • TeraVita SP-90 is 100% soluble in water. This enables the product to be applied dry or in a liquid form.
  • Derived from oxidized lignite (Leonardite) 


SP-90 is potassium humate powder that acts a natural soil and plant growth stimulant. It is a dark brown to black powder with an average 90% humic acid content. SP-90 is 100% soluble in water. It is easily assimilated by plants and some of its main functions include improving plant immunity, improving plant metabolism, improving plant root development, improving the supply of plant nutritional elements and increasing the formation of ferments. SP-90 promotes the increased accumulation of chlorophyll, sugar, amino acids and more and improves the efficiency of nitrogen utilization, allowing for reduced fertilizer rates. One of the primary actions of SP-90 is to increase the plant’s ability to withstand the stresses of heat, drought, cold, disease, insect and other types of environmental or cultural pressures. SP-90 also increases general plant productivity, in terms of yield, as well as plant stem strength. Within the soil, SP-90 stimulates soil microorganisms, promoting Humus formation.

Differences from other Humate products:
- Low sodium formulation consisting primarily of Potassium Humic Acid Salts. Provides extra potassium for crop nutrition and minimizes sodium in conditions where high salt content already exists.
- The presence of soluble Silicon (Si) compounds in SP-90 provides plants with the nutrition for stronger stems, making them more resistant to natural stress situations and insects.

Description for Use:

Mix 8 oz of Humic Acid powder into 1 gallon of water to make a humic acid liquid concentrate. Mix well to ensure the powder has dissolved into the liquid. This solution is now your liquid concentrate and it should be diluted at the rates below for use. You can store this mix in a closed container for up to one year.

Mix the liquid concentrate at the below rates to cover 250-500 square feet. Can be applied weekly.

  • Soil Drench: Mix 1 oz of liquid humic acid concentrate per 1 gallon of water
  • Foliar Feed: 1/2 ounce of liquid humic acid concentrate per 1 gallon of water

Compost Teas (as fungal food)

Pre-activation: if you are pre-activating the compost tea ingredients, use ½ oz. of SP-90 blended into the amount of ingredients you use per 25 gallons of tea brew.

During brewing: at the beginning of the brew cycle add 2.25 oz. of SP-90 per 25 gallons of tea solution.

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