• Products
      • Jack's Classic
        • Jack's with Crystal Green
        • All Purpose
        • Blossom Booster
        • The Dynamic Duo
        • Petunia FeED
        • Acid Special
        • Houseplant Special
        • African Violet
        • Orchid Special
        • Orchid Bloom Booster
        • Orchid Liquid
        • ClassiCote
        • Buy Jack's Classic
          • International Order
      • Jack's Professional
        • Jack's FeED
          • Petunia FeED
          • Fall Pansy FeED
          • Mum FeED
          • Spring Pansy FeED
          • Poinsettia FeED + Mg
          • Poinsettia FeED + Ca Mg
          • Hydro Herb FeED
        • Jack's LX
          • 21-5-20 All Purpose LX
          • 20-5-19 Poinsettia LX
          • 17-4-17 Pure Water LX
          • 16-2-15 Hi Alk Plug
          • 15-0-0 Cal-Trate LX
          • 15-0-14 Dark Weather LX
          • 14-5-38 K Trate LX
          • 13-2-13 Plug LX
          • 10-0-0 Mag Trate LX
        • Jack's Pro
          • General Purpose Formulas
            • 25-5-15 High Performance
            • 20-20-20 General Purpose
            • 20-10-20 General Purpose
            • GP Product 4
          • Peat-Lite Formulas
            • 20-10-20 Peat-Lite
            • 17-5-24 Low Acid Peat-Lite
            • 15-16-17 Peat-Lite
            • 15-11-29 Peat-Lite
            • 15-5-25 Poinsettia Peat-Lite
            • Poinsettia Peat-Lite
          • No Phosphate Formulas
            • 20-0-20 Hi Cal Peat-Lite
            • 15-0-15 Dark Weather
            • 15-0-15 Dark Weather Peat-Lite
            • 15.5-0-0 Calcium Nitrate
            • Jack's Pro Product #12
            • Jack's Pro Product #13
          • High Phosphate Formulas
            • 15-30-15 Hi Phosphate
            • 10-30-20 Blossom Booster
            • 9-45-15 Plant Starter
          • High K Finisher Formulas
            • 15-20-25 Poinsettia Finisher
            • 15-10-30 Pot Mum Finisher
            • 13-0-44 Potassium Nitrate
            • Jack's Pro Product #20
            • Jack's Pro Product #21
          • Specialty Crop Formulas
            • MOST
            • MOST no Boron
            • Chelated Trace Element Mix
            • 5-12-26 Hydroponic
            • 27-15-12 Foliar Feed
            • 24-8-16 Tropical Foliage
            • 21-7-7 Acid
            • 16-4-12 Easter Lily
            • 15-15-15 Geranium
            • 16-4-17 Hydro Herb FeED
          • Orchid Formulas
            • 16-4-20 Orchid Well Water
            • 12-3-15 Orchid -RO Type Water
        • Jack's Special
          • 21-8-18 Peat-Lite
          • 21-2-18 Low Phosphorus Peat-Lite
          • 20-8-20 Peat-Lite
          • 17-15-17 Peat-Lite
          • 17-5-26 Finisher
      • Specialty Nutrients
        • Buy Specialty Nutrients
      • Hydroponics
        • Buy Hydroponics
    • Lab Services
      • Testing Services
        • Nutritional
        • Physical
        • Request a Test Kit
        • Contract Lab Services
      • Analysis
      • Quality Control
      • Jack's Instruments
    • Our Company
      • Manufacturing
      • Sustainability
      • History
      • Contact Us
    • Technical Support
      • Downloads
      • Find a Retailer
    • Hands On Horticulture
    • Superior Quality
    • Jack's Rave Reviews
    • Commited to Sustainability

    • Hands on Horticulture

      The Peters family name is trusted by growers for good reason. We have earned a reputation for delivering professional fertilizers that increase yield as well as reliable testing and analysis services required to improve a growers bottom line.

    • Grower CommunityOUR INSIGHTS ON THE COMMUNITY
    • We Use Jack'sYOU SHOULD TOO
    • ProductsOUR SOLUTIONS

      • Blog

      • 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...
      • Fertilizer Choice for Easter LiliesEven though the cold weather may have you thinking winter, pretty soon spring will be in the air and the beautiful sites and smells of Easter Lillies will be upon us! In regards choosing a fertilizer ...
      • Jack’s… are Better!Hey Jack’s Users…we would love to hear your feedback. Here is a RAVE review from the Greenhouse Megastore. Thanks for your support! ” Have you ever played POKER? Opening hand usually is Jacks or Bette...
      • Twitter
        • Beautiful tulips from the Penn State auction. Thanks to Van Hoeklan Greenhouses. http://t.co/V83N7Ndm
      • Posted By J.R.Peters Inc.8:21 AM January 27
        • Cari & Lin are attending a social media talk at the Penn State extension conference. How exciting!
      • Posted By J.R.Peters Inc.1:37 PM January 26
      • E-mail this page
      • Share this on Facebook
      • Tweet This!
      • Share this on del.icio.us
      • Stumble upon something good? Share it on StumbleUpon
      • Buzz up!
      • Digg this!
      • Share this on Reddit
    • Contact Us