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      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.  Ask for Jack's!

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      • Blog

      • Fertilizer frequency: Periodic or Constant Liquid Feed?Hello Jack’s Fertilizer Fan’s — Here is another question that we have been answering quite a bit this season, I hope you find it helpful. Grower : “We are currently using your Jack’s Professional 20-1...
      • Citric Acid and Algae BloomsHello Jack’s Fertilizer Fans - We received the following question and I wanted to pass along the info just in case you run into this too. Happy Growing! Grower Question : “We have some sort of mold or...
      • Jack’s pH Adjuster – a useful tool for both hydroponics and pure water growingOur Jack’s Professional pH adjuster is designed to stabilize and maintain pH in the root zone of the plant. It will also add some buffering capacity to the water source to help keep this roots zone in...
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        • We had our new sign installed today at our facility. Thanks to Dave and crew from Valley Wide Signs & Graphics! http://t.co/Z6Cb3JRIrG
      • Posted By J.R.Peters Inc.2:19 PM May 21
        • We are actually having a nice Spring here in Allentown. Check out our newest JRP visitors. http://t.co/3MByKjlF3l
      • Posted By J.R.Peters Inc.10:10 AM May 13
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