See the difference after each application.

Krucial NPK Carbon Fertilizer is a potassium citrate based fertilizer that supplies readily available nutrients to your plants. This fertilizer can be applied any time of the year to any crop, for improved yields.

Ultimate NPK
Krucial NPK Carbon Fertilizer is a premium blend that can be fertigation and foliar fed. Krucial supplies plants with highly available NPK to enhance crop health and production. Formulated with the cleanest raw ingredients, Krucial has a low salt index and does not contain unwanted chlorides or sulfates.


Centered on Sustainability
Krucial is economical, environmentally friendly, and efficient. This product was developed to help farmers increase yields by improving the overall health of their plants and soils. This product’s unique formulation can produce great results for all crops at any time of the year.


The Strength of Citrate
A naturally occurring organic acid known as citric acid is the foundation of this fertilizer. The Citric Acid Cycle, or Krebs Cycle, is a building block that leads to the formation of ATP, or energy, needed for critical metabolic processes within plants. We use citric acid as an ingredient in Krucial to create potassium citrate. As far back as 1959, studies were conducted to showcase plant uptake from different sources of potassium, including potassium nitrate, potassium chloride, potassium sulfate, and potassium citrate. Results proved that uptake of potassium ions was highest with the citrate form of potassium.


Carbon Boosted
Straight Arrow’s Krucial is an innovatively formulated “Carbon Boosted” fertilizer developed to supply a power punch of carbon and other readily available plant nutrients. Straight Arrow™ Organic Acids make this all possible. These organic acids are anion based and loaded with carbon chains to provide optimum uptake. Our “Carbon Boosted” fertilizers work as a natural plant metabolite, enhancing fruit quality, plant production, and crop yields.


Optimal Plant Nutrition


Organic Acids


Superior Uptake


Amazing Results


Environmentally Friendly