Products

    Filter
      2435 products
      Jack's Professional 9-45-15 Plant Starter - Greenhouse Megastore
      Jack's Professional 9-45-15 Plant Starter - Greenhouse Megastore
      Jack's Professional 9-45-15 Plant Starter
      $80.85
      Jack's Professional High Performance 25 - 5 - 15 - Greenhouse Megastore
      Jack's Professional High Performance 25-5-15
      $47.80
      Closeout
      Jack's Professional® Interiorscape Special 21 - 7 - 16 - Greenhouse Megastore
      Jack's Professional® Interiorscape Special 21-7-16
      $89.28 $99.20

      Save $9.92

      Jack's® Classic Orchid Grow & Bloom Fertilizer Combo - Greenhouse Megastore
      Jack's® Classic Orchid Grow & Bloom Fertilizer Combo - Greenhouse Megastore
      Jack's® Classic Orchid Grow & Bloom Fertilizer Combo
      $19.99
      Jack's® Nutrients 12 - 4 - 16 RO Pure Water - Greenhouse Megastore
      Jack's® Nutrients 12 - 4 - 16 RO Pure Water - Greenhouse Megastore
      Jack's® Nutrients 12-4-16 RO Pure Water
      Starting at $18.19
      Jack's® Nutrients 15 - 6 - 17 Clone Starter - Greenhouse Megastore
      Jack's® Nutrients 15 - 6 - 17 Clone Starter - Greenhouse Megastore
      Jack's® Nutrients 15-6-17 Clone Starter
      Starting at $18.99
      Jack's® Nutrients 7 - 15 - 30 Finish Fertilizer - Greenhouse Megastore
      Jack's® Nutrients 7 - 15 - 30 Finish Fertilizer - Greenhouse Megastore
      Jack's® Nutrients 7-15-30 Finish Fertilizer
      Starting at $19.95
      Jack’s Classic 10-30-20 Blossom Booster - Greenhouse Megastore
      Jack’s Classic 10-30-20 Blossom Booster - Greenhouse Megastore
      Jack’s Classic 10-30-20 Blossom Booster
      Starting at $6.99
      Jiffy - 7® Peat Pellets - Greenhouse Megastore
      Jiffy - 7® Peat Pellets - Greenhouse Megastore
      Jiffy-7® Peat Pellets
      Starting at $72.79
      Jiffy® Poly - Pak Preloaded Peat Pots - Greenhouse Megastore
      Jiffy® Poly - Pak Preloaded Peat Pots - Greenhouse Megastore
      Jiffy® Poly-Pak Preloaded Peat Pots
      Starting at $88.20
      Jiffy® 7C Coco Pellets - Case of 756 - Greenhouse Megastore
      Jiffy® 7C Coco Pellets - Case of 756 - Greenhouse Megastore
      Jiffy® 7C Coco Pellets - 756 pellets
      $45.36
      Jiffy® Greenhouse w/ Bonus SUPERthrive Sample - Greenhouse Megastore
      Jiffy® Greenhouse w/ Bonus SUPERthrive Sample - Greenhouse Megastore
      Jiffy® Greenhouse w/ Bonus SUPERthrive Sample
      $12.99
      Jiffy® Peat Pots - Greenhouse Megastore
      Jiffy® Peat Pots - Greenhouse Megastore
      Jiffy® Peat Pots
      Starting at $3.50
      Closeout
      Jiffy® Peat Pots - Retail Packaging - Greenhouse Megastore
      Jiffy® Peat Pots - Retail Packaging - Greenhouse Megastore
      Jiffy® Peat Pots - Retail Packaging
      Starting at $1.27 $1.59

      Save $0.32

      Jiffy® Seed Starting Windowsill Greenhouse - Greenhouse Megastore
      Jiffy® Seed Starting Windowsill Greenhouse - Greenhouse Megastore
      Jiffy® Seed Starting Windowsill Greenhouse
      $4.99
      Jiffy® Strips - Greenhouse Megastore
      Jiffy® Strips - Greenhouse Megastore
      Jiffy® Strips
      Starting at $7.50
      Johnson CO2 Generator - Greenhouse Megastore
      Johnson CO2 Generator
      $1,545.00
      Free Shipping
      Junior Teaching Greenhouse Package - Greenhouse Megastore
      Junior Teaching Greenhouse Package - Greenhouse Megastore
      Junior Teaching Greenhouse Package
      Starting at $21,499.00
      Free Shipping
      Junior Victorian Greenhouse Kit 7.9 x 12.6 ft. with 4mm Tempered Glass Panels and Aluminum Frame - Greenhouse Megastore
      Junior Victorian Greenhouse Kit 7.9 x 12.6 ft. with 4mm Tempered Glass Panels and Aluminum Frame - Greenhouse Megastore
      Junior Victorian Greenhouse Kit 7.9 x 12.6 ft. with 4mm Tempered Glass Panels and Aluminum Frame
      $9,599.00
      K - 12 STEM Student Alfalfa Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Alfalfa Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Arugula Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Arugula Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Cilantro Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Cilantro Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Fennel Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Fennel Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Microgreen Kit - Single Classroom Grow Kit - Greenhouse Megastore
      K - 12 STEM Student Microgreen Kit - Single Classroom Grow Kit - Greenhouse Megastore
      K-12 STEM Student Microgreen Kit - Single Classroom Grow Kit
      $8.00
      K - 12 STEM Student Parsley Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Parsley Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Purple Radish Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Purple Radish Microgreen Kit - Classroom Bundle
      $200.00
      K - 12 STEM Student Variety Pack Microgreen Kit - Classroom Bundle - Greenhouse Megastore
      K-12 STEM Student Variety Pack Microgreen Kit - Classroom Bundle
      $210.00
      Kombi Dual Function Raised Bed & Cold Frame - Greenhouse Megastore
      Kombi Dual Function Raised Bed & Cold Frame - Greenhouse Megastore
      Kombi Dual Function Raised Bed & Cold Frame
      $219.99
      Kool - Mart 20 ft. Wide Retail Greenhouse - Greenhouse Megastore
      Kool - Mart 20 ft. Wide Retail Greenhouse - Greenhouse Megastore
      Kool-Mart 20 ft. Wide Retail Greenhouse
      Starting at $8,330.00
      Closeout
      Kwazar Adjustable White Nozzles for Orion and Neptune Wands - 10 pack - Greenhouse Megastore
      Kwazar Adjustable White Nozzles for Orion and Neptune Wands - 10 pack - Greenhouse Megastore
      Kwazar Adjustable White Nozzles for Orion and Neptune Wands - 10 nozzles
      $39.20 $49.00

      Save $9.80

      Sold Out
      Kwazar Mercury Trigger Sprayer - Greenhouse Megastore
      Kwazar Mercury Trigger Sprayer
      $10.99
      Closeout
      Kwazar Neptune Backpack Sprayer - Greenhouse Megastore
      Kwazar Neptune Backpack Sprayer - Greenhouse Megastore
      Kwazar Neptune Backpack Sprayer
      $147.04 $172.99

      Save $25.95

      Closeout
      Kwazar Neptune Electric Backpack Sprayer - Greenhouse Megastore
      Kwazar Neptune Electric Backpack Sprayer - Greenhouse Megastore
      Kwazar Neptune Electric Backpack Sprayer
      Starting at $403.75 $475.00

      Save $71.25

      Closeout
      Kwazar Orion O - Ring Replacement Kit - Greenhouse Megastore
      Kwazar Orion O-Ring Replacement Kit
      $13.60 $17.00

      Save $3.40

      Closeout
      Kwazar Orion Super Pump Sprayer - Greenhouse Megastore
      Kwazar Orion Super Pump Sprayer - Greenhouse Megastore
      Kwazar Orion Super Pump Sprayer
      Starting at $80.75 $95.00

      Save $14.25

      Closeout
      Kwazar Telescopic Wand for Orion and Neptune Sprayers - Greenhouse Megastore
      Kwazar Telescopic Wand for Orion and Neptune Sprayers
      $23.20 $29.00

      Save $5.80

      Closeout
      Kwazar Venus O - Ring Replacement Kit - Greenhouse Megastore
      Kwazar Venus O-Ring Replacement Kit
      $13.60 $17.00

      Save $3.40

      Ladbrooke Maxi 1 Soil Blocker - Greenhouse Megastore
      Ladbrooke Maxi 1 Soil Blocker - Greenhouse Megastore
      Ladbrooke Maxi 1 Soil Blocker
      $105.00
      Sold Out
      Ladbrooke Micro 20 Soil Blocker - Greenhouse Megastore
      Ladbrooke Micro 20 Soil Blocker - Greenhouse Megastore
      Ladbrooke Micro 20 Soil Blocker
      $29.99
      Sold Out
      Ladbrooke Mini 4 Soil Blocker - Greenhouse Megastore
      Ladbrooke Mini 4 Soil Blocker - Greenhouse Megastore
      Ladbrooke Mini 4 Soil Blocker
      $28.99
      Lambert All Purpose Potting Mix - Greenhouse Megastore
      Lambert All Purpose Potting Mix - Greenhouse Megastore
      Lambert All Purpose Potting Mix
      Starting at $20.36
      new
      Lambert LM - 18 Germination Mix - Greenhouse Megastore
      Lambert LM-18 Germination Mix
      $21.76
      Free Shipping
      Lancing Cedar Glass to Ground Greenhouse Kit, 10 ft. Wide with 3mm Safety Glass and Aluminum Base - Greenhouse Megastore
      Lancing Cedar Glass to Ground Greenhouse Kit, 10 ft. Wide with 3mm Safety Glass and Aluminum Base - Greenhouse Megastore
      Lancing Cedar Glass to Ground Greenhouse Kit, 10 ft. Wide with 3mm Safety Glass and Aluminum Base
      Starting at $30,250.00
      new
      Landmark Plastic Half Dome with Tray - Pack of 4 - Greenhouse Megastore
      Landmark Plastic Half Dome with Tray - Pack of 4 - Greenhouse Megastore
      Landmark Plastic Half Dome with Tray - 4 domes and trays
      $35.96
      Lap Fasteners with Screw - Pack of 100 - Greenhouse Megastore
      Lap Fasteners with Screw - Pack of 100
      $35.99
      Large Autofog Chemical Applicator - Greenhouse Megastore
      Large Autofog Chemical Applicator
      $14,073.00
      Sale
      Large Nursery Containers - Greenhouse Megastore
      Large Nursery Containers - Greenhouse Megastore
      Large Nursery Containers
      Starting at $79.86 $90.75

      Save $10.89

      Leak Lock Joint Sealer - Greenhouse Megastore
      Leak Lock Joint Sealer
      $10.55