Ferticell Pro K 0-0-20 Organic Potassium Fertilizer in 32oz Bottle
1 Gallon of Ferticell Pro K 0-0-20 Organic Potassium Fertilizer
Ferticell Pro K 0-0-20 Organic Potassium Fertilizer in 2.5 Gallon Bottle
Case of Ferticell Pro K 0-0-20 Organic Potassium Fertilizer
Ferticell Pro K 0-0-20 Organic Potassium Fertilizer Info Sheet
Information Sheet About Ferticell Pro K 0-0-20 Organic Potassium Fertilizer
Reasons to Try Ferticell Pro K 0-0-20 Organic Potassium Fertilizer
Usage Details for Ferticell Pro K 0-0-20 Organic Potassium Fertilizer

Pro K 0-0-20 Organic Potassium Fertilizer

Regular price$168.80
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Ferticell Pro K 0-0-20 is an organic certified, fully soluble, plant-derived liquid potassium fertilizer designed to supply potassium in a higher plant usable form. Potassium is the third most commonly used nutrient in plants, Pro K 0-0-20 plays important roles in plant functions such as regulating the opening and closing of the stomata, activating enzymes, balancing ions, translocating sugars, and osmosis. Pro K is plant-based and entirely organic, so all its components are useful for the activities of plants. We can manufacture Potassium with little to no sulfur content by using the unique Ferticell Technology manufacturing capabilities. Unlike many other organic potassium fertilizers, this significantly opens up the application choices and availabilities. When used as a foliar application, Pro K has shown tremendous results in fruits, bringing increased yield and quality to market with applications starting after bloom. Large amounts of K accumulate in fruits, so leaf symptoms are more likely and more extreme as fruit maturity reaches during heavy crop years (Hanson, 1996)

Product Benefits

  • the excellent plant absorption rate, rapid uptake through the leaf
  • Ideal where soil application is a limiting factor
  • Extremely phloem mobile within the plant
  • Easy to handle, consistent liquid solution
  • Plant-derived organic potassium
  • Works for both foliar or soil applications
  • Rapid uptake through the leaf provides an immediate plant response
  • No application risk of phytotoxicity
  • Cannot tie up in soils because of molecular derivation
  • Non-salt-contributor and does not contain chloride
  • Works on all types of plant life in all stages of the plant cycle
  • Instantaneous delivery of key nutrients
  • Works seamlessly with most pesticides and herbicides
  • Known to improve drought resistance

Things To Remember About Potassium

Large applications of conventional potassium are needed if potassium levels are allowed to fall in the soil, often for years, before proper K levels are restored. Ferticell Pro K 0-0-20 is very effective, allowing considerably less material to be used compared to conventional potash sulfate or potassium thiosulfate applications. Ferticell Pro K 0-0-20 can minimize deficiencies that, when low levels are present, can cause significant damage to trees. Also, due to the reduced flowering of the surviving spurs, shoot and spur growth will be decreased. A number of our growers asked for a soluble, organic potassium fertilizer in 2015, which did not have the salt problems associated with a number of existing approved organic potassium fertilizers on the market. Their only choice for organic potassium fertilizer has been Sulfate of Potash (SOP) for many years. We applied for registration in 2016 and the first organic potassium extracted from plants was registered with WSDA & CDFA-OIM in 2017. Pro K is the only approved safe, plant-based, liquid potassium fertilizer with an organic potassium content of 20%. In order to be beneficial to plant activities, we have developed all the components of Pro K, giving it a lower salt index than mineral sources and is totally soluble.

Comparing Sulfate of Potash To Pro K

  • For many years, Sulfate of Potash (SOP) has been our only option for organic Potassium until now.
  • Some limiting factors of the SOP are solubility for a spray solution above 5% unless you purchase the powdered material, Pro K is a totally soluble, farmer-friendly liquid formulation.
  • SOP has Sulfur up to 18% and may limit rates in several situations where Sulfur can add to anaerobic soil conditions Pro K is Sulphur free.
  • Pro K is better managed as light and frequent applications as a sprayable bloom spray fertilizer Potassium easily leaching from sandy soils as a granular with rainfall.
  • Coated K materials have a very light release rate, making it difficult to see immediate corrections in plants and/or fruit requiring high application rates. Pro K is very efficient often times seeing results in 24-48 hours. 

Application Uses 

Pro K can be applied in a myriad of application methods. It may be used indoors/outdoor with all hydroponic, NFT, drip, aeroponic, irrigation and continuous liquid feeding systems. It is also able to be foliar sprayed.

Media Uses

Pro K may be used with all soil and soilless media, including Coco Coir, and is compatible with all nutrient programs. Always check for pH and CF levels.

Application Rates 

Shake well before using. Store in a cool, dry place. Do not store in direct sunlight.

Container Application: 5-15 ml per 1-gallon of water

Soil Application: 1-2 quarts per acre

Foliar Application: 1-2 quarts per acre

*Rates may vary based on conditions and application

Available Sizes

1 quart, 2.5 gallon, 2 x 2.5 gallon, 5 gallon, 80, 170 & 275 gallon tote sizes

Our website calculates the shipping charges automatically in real-time, giving you the options to ship via FedEx, UPS or USPS Priority Mail.

Expedited shipping is also available.

All freight shipments must have a freight form filled out in full before we can book shipping.

General Delivery Policy:

By use of this site, customers authorize the carrier to leave a package at the destination delivery address without obtaining a signature if the carrier driver deems the location to be safe. Customers who are not able to locate the package that is claimed as delivered must follow the instructions for filing a claim listed below under the heading "Incorrect Delivery and Lost Package Claims."

How does shipping work?

When ordering online, our website calculates the shipping charges automatically in real-time, giving you the options to ship via FedEx, UPS or USPS Priority Mail. Expedited shipping is also available. All orders that are large enough to be shipped via freight carrier we will provide you with a freight quote which the purchaser will pay for the freight expense. All freight shipments must have a freight form filled out in full before we can book your freight for pick up. We strive to ship in-stock items within 24 – 72 hours after receiving order.

As a rule of thumb, shipping charges we assess simply amount to whatever FedEx, UPS, USPS or Freight carriers published rates are with 0% markup.

How do I calculate shipping?

Simply put, we are always looking for the cheapest method of shipping available for your order. Shipping is assessed using carrier calculated rates direct from the carriers in real-time.

  • We ship via FedEx or UPS (Home Delivery and Business Delivery), UPS 3 Day Select (Expedited), FedEx or UPS 2 Day (Expedited), FedEx or UPS 1 Day (Expedited) or USPS Priority Mail.

We ship via FedEx, UPS or USPS to residences and businesses.

How fast is shipping?

We normally ship orders via FedEx or UPS Ground or via Freight Truck, while expedited shipments ship via FedEx or UPS Air 1,2 or 3 Day. On average, we ship in-stock items within 24 to 72 hours of receiving your order.

If some items on your order are temporarily out of stock, we will hold your order for up to 1 week.

If we expect a longer delay, we will contact you to give you the options of

(a) shipping what is currently available and the back-ordered item(s) later or

(b) waiting until everything is in stock before shipping or

(c) canceling the back-ordered item(s) and shipping the items which are in stock.

We do our best to get your orders processed and provide same day shipping if received before noon Pacific time. This is not always possible but our goal on every order placed!

FedEx and UPS Ground delivers Monday-Friday from 8 a.m. to 5 p.m.  

How does freight work?

If shipping via freight truck you must be able to accommodate a truck at your residence/business and that it is your responsibility to unload the freight. Some items cannot be unloaded without using a forklift/lift gate. If unloading by hand, be prepared to off-load the pallet that holds your order in approximately 15 minutes, or you may be charged an additional fee by the trucking company for the extra time (rates up to $100/hr).

Do not sign for your freight shipment until you have confirmed an identical count of boxes, bags, rolls, bundles, pails, etc. and have checked very carefully for apparent and/or concealed damage. We will not accept any responsibility for missing and/or damaged items unless you note a count discrepancy and/or identify damage on the bill of lading at the time of delivery *Take pictures immediately of damaged freight*.

Tracking and Receiving Orders:

All orders shipping via FedEx, UPS or USPS Priority Mail, except for drop-ship orders, will be provided with tracking information via an email to the email address provided on the order on the day the order is shipped. Please contact us immediately if you think your shipment is lost or if your shipment arrives damaged.

When your order arrives, open the package immediately and inspect the content against the packing slip. Notify us immediately of any shortages or damages, do not discard any damaged items or shipping cartons (please take pictures). The shipping company may require an inspection prior to approving any claim and most will require pictures of the merchandise.

Claims Policy:

Visible Damage, Concealed Damage, and Missing Content Claims - Visible Damage is defined as any damage to the packaging that is identifiable without opening the package at the time of delivery. Concealed Damage is defined as any damage that is not immediately noticeable at the time the package is opened or when the product is first used. Missing Content is defined as any package that is missing product that the packing slip states is included. These types of claims must be made directly to Rocky Mountain BioAg within 5 business days of delivery. Any claims made after that time cannot be honored. Please contact Rocky Mountain BioAg at 877-874-2334 or email Support@RockyMountainBioAg.com to make such a claim.

Incorrect Delivery and Lost Package Claims - Incorrect Delivery is defined as any incident where the driver delivers the package to the wrong address or individual. Lost Packages may occur in two ways. First, lost packages may occur when packages are not able to be located within the carrier's network. Second, a package may be considered lost when the carrier claims delivery was completed by leaving the package on the doorstep, but the customer cannot locate the package. Both incorrect delivery and lost package incidents are usually discovered through standard tracking of the package. Claims for either of these problems must be made directly to Rocky Mountain BioAg upon discovery. No claims will be honored after 30 days from shipment date. Please contact Rocky Mountain BioAg at 877-874-2334 or email Support@RockyMountainBioAg.com to make such a claim.

Incorrect Product Claims – Rocky Mountain BioAg must be notified directly within 30 days of shipment of any package received where contents are incorrect. Please contact Rocky Mountain BioAg at 877-874-2334 or email Support@RockyMountainBioAg.com to make such a claim.

Shipping to Canada or other international destinations:

Items shipped to Canada my be subject to import duties or other fees. All additional fees incurred during the import process are the responsibility of the buyer, Rocky Mountain BioAg does not cover import fees for any international shipments. For shipping to countries outside the US and Canada, contact RMBA before placing your order. Many of our products are not labeled for sale outside the United States.

Shipping to Hawaii, Guam, Alaska, Puerto Rico and the US Virgin Islands:

Items are generally shipped to these locations via USPS Priority Mail. USPS Priority Mail does not guarantee transit time and Parcel Post can take up to several weeks to AK, HI, and PR. 

Expedited Shipments:

FedEx and UPS 1 Day and 2 Day services only run on business days. FedEx and UPS 2 Day orders placed on Friday will not arrive until Monday. FedEx 2 day orders placed on Thursday  will be marked for Saturday delivery if available.

Drop Ship Orders:

Drop ship orders will often be delivered within one week of ordering, but in some cases these orders can take longer due to product availability and weather delays. Once an order has shipped, your order cannot be canceled. Drop Ship orders will be updated with a email containing the tracking number as soon as the product has shipped.

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Biological... Beyond Organic®

Organic is just the start

RMBA is committed to provide natural and organic products that support healthy soils. Even if a product is not listed as 'organic' you can rest assured that it will help, not hurt your soil.

Don't take our word for it


This has been the best pumice i have ever used!!! Besides the great customer service (*****)

Ricardo S

McAllen, TX


Rocky Mountain BioAg has the best customer service! Prompt delivery and product support. Thanks !

Joe B

South Kingstown, RI


I have a greenhouse that unfortunately does not get the ideal sunlight due to its location on the north side of my home. I have been using Rocky Mountain BioAg’s Quantum Growth Organic Total for over a year and have seen a dramatic increase in plant growth and vegetable yield compared to past years. Highly recommend the product.

Jack C

Sarasota, FL


Excellent customer service, quick response, fast turnover and shipment of merchandise and product was exactly what was described on website and what I wanted. Great Company!

Jessica S

Harrisonburg, VA