JR PETERS, INC is a Custom Toll Manufacturer, Designer, Formulator and Producer of fertilizer products for the Horticulture, Specialty Agriculture and Retail markets.

Started in 1947 by Bob Peters, his Horticultural Services Co. tested soil for greenhouse growers and made recommendations on how to produce the best crops. Today, under the leadership of Bob's son, Jack Peters, JR PETERS, INC is advancing the tradition of Peter’s family quality products and services.

Our laboratory has been providing outstanding analytical services to the horticulture industry for over 55 years. Professional growers, horticultural products manufacturers, and university researchers throughout the world trust us to supply accurate and timely services.

For over 64 years, the Peters' family has designed and produced "The Finest in Soluble Fertilizers".

Introduced in 1997, the Jack's Classic® water-soluble plant foods are the finest products we have ever made for the home grower.

Fall, 2002 marked the introduction of the all-new Jack's Professional® fertilizer, an enhanced fertilizer formula that is even better than Bob Peter's signature "True Blue" formula—Peter's Professional®— the first blue water-soluble fertilizer.

JR PETERS, INC also produces specialty fertilizer products for other companies on a contract or toll basis.

At JR PETERS, INC, we pride ourselves on designing, formulating and manufacturing the best water-soluble fertilizers in the industry. Our state-of-the-art laboratory services support the horticulture, specialty agriculture and retail markets with unprecedented reliability and accuracy.

Our company was founded in 1997. However, our leadership position and legacy of innovation in the horticulture industry date back more than 63 years, when our family patriarch, Bob Peters, established the Horticultural Services Company.

Bob tested soil for greenhouse growers and made recommendations on how to produce the best crops. Later, Bob introduced the original Peters Professional Plant Food–one of the first blue water-soluble fertilizers.

Today, as president of JR PETERS, INC, Jack Peters advances our family's tradition of delivering only the finest quality products and services.

Visit the JR PETERS manufacturing facilities and you will find individuals with decades of industry experience working in a state-of-the-art computerized production environment. Our formulation experts have over 63 years of experience. Moreover, we now offer hundreds of formulations to fit all nutritional needs including technologies for greenhouse, nursery, turf, specialty agriculture, lawn and garden and liquid/dry nutrient charges.

Our corporate headquarters, manufacturing and analytical testing facilities are located in Allentown, Pennsylvania.

Quality Through the Years

The Family at JR PETERS Inc. has been designing and producing water-soluble fertilizer since the late 40's. Our products have become the standard of the industry to growers of horticultural specialty crops. We value our reputation, are determined to design and deliver products to our growers that meet our own highest standards.

We know what it costs us to manufacture Jack's Fertilizers. In 2010, our manufacturing facility began the process of Lean Transformation. We are evaluating each on our processes in order to make our production more efficient, reduce waste and save costs. All of these efforts will related to a more competitive price in our ever-struggling economy.

To use an old cliché, the cheaper brand manufacturer must know what his material is worth.

Here at JR PETERS, we are striving to bring your our cutting edge technology at extremely competitive prices, so even though you are paying a bit more, the results in the use of our products will prove their worth.


From time to time, we receive letters from customers telling us about the wonderful results that they have experienced thanks to Jack's fertilizers.

Our names are Molly Rudinger and Julia Keinan. We are in the eighth grade at Bedford Middle School, in Westport, Connecticut. We recently conducted a test regarding the effect of different plant foods on plant growth. The plant foods that we used were: MiracleGro, Neptune’s Harvest, and your brand, Jack’s Classic.

Our experiment was to plant two-hundred cat grass wheat seeds into four different pots (fifty seeds in each) that had two cups of soil in each pot. We would then put the correct amount of plant food into a measuring cup containing one-hundred and fifty milliliters of clear water. After the two substances were stirred together, the mixture was poured into the soil along with the seeds. The plants were watered once during this weeklong experiment. Two trials were tested for this process.

Our hypothesis for this experiment was: if MiracleGro is used, then the plant will grow taller. After seven days of conducting our experiment, our hypothesis was proven wrong. The average heights for the three trials and the control were as follows: the plant with no plant food grew to be 12.4 centimeters. The plant with MiracleGro was 10.95 centimeters. The plant with Neptune’s Harvest grew to 11.95 centimeters, and the plant with Jacks Classic grew to be 12.95 centimeters.

As you can see, the plant with Jack's Classic grew the most. This proved our hypothesis wrong.

We wrote this letter so that we could acknowledge the fact that your plant food proved to be the most effective. From here on into the future, we will recommend your plant food to anybody with a “green thumb”.

Thank you very much for taking the time to read our letter. We appreciate how effective your plant food was and how much it improved our experiment.

Molly Rudinger and Julia Keinan
Bedford Middle School
Westport, Connecticut

Dear Mr. Peters,


Thank you for the information on the water soluble 20-20-20 fertilizer I have been using.

I mentioned the excellent results I had with African violets. I was so impressed with them last year that I took pictures! See for yourself how well they did on your product.

Margaret Pointing
Mississauga, Ontario

I have tried various fertilizers on my flowers...people stop all the time and ask what I do to get such great results. I could not be happier.

Kenneth R. Lebohner
Aquebogue, New York

I have never had a green thumb. It's always been hit and miss. I thought maybe the dirt wasn't rich enough, or there was not enough sunlight, or perhaps I was using the wrong fertilizer, as the plants seemed to burn. That didn't matter this summer. Since I went to Randy's Raising's in Calcutta, Ohio, and purchased your product, to use on my houseplants, rose bushes, and garden plants, I have a crop of tomatoes, (25 on four plants that are five feet, two inches tall!) twice as many green peppers, blooms in all my flowering beds, and greener vines that grow an inch at night! My flowering petunia baskets are not as impressive as the ones on your site, but they were half-dead from not having water. I could not stand watching my neighbor ignore them any longer, so I fed them Jack's Classic 1 night, and two days later, he gave them to me. He is using a competitor's product. His tomato plants appear dwarfed, at two and a half feet tall, with small fruit, and his plants out number mine. I will continue to grow my summer plants and houseplants with your product. I am greatly amused. "Thank you".

DeAnne Hilton
East Liverpool, OH

Dear JR Peters,


I received two hanging baskets with Wave Petunias for Mother's Day from my daughter from a roadside flower stand this side of Lancaster. My plants have tripled in size and they are beautiful. I started feeding them Jack's Classic All Purpose "20-20-20" for about a week, and then fed Blossom Booster "10-30-20" every other day, changing from day to day. I now use only Blossom Booster. I have great comments on them, people stop to ask if they are real, yes they are real, thanks to your great plant food.

Bette Heffner
Allentown, Pennsylvania

Two years ago, I switched to your Jack's Professional Orchid fertilizer 16-4-20 Cal Mag. My orchids have never been better! This past weekend, my orchid display at the Knoxville, Tennessee orchid show won 11 blue ribbons, four trophies, the American Orchid Society's prestigious Show Trophy, the American Orchid Society's Award of Merit and the Certificate of Cultural Merit. Again and again, I received compliments on the health and vigor of my plants and their blooms, and I tell everyone whose fertilizer I am using.

Thanks and best regards,
Ed Merkle
Merkle's Orchids
1008 Maplewood Place
Nashville, Tennessee

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