Skip to content
FREE SHIPPING On Continental US Orders Over $175!*
FREE SHIPPING On Continental US Orders Over $175!*

Plant Supplements & Additives

  • Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69

    HEAVY 16 Bud B 1-3-6

    HEAVY 16

    HEAVY 16 BUD B • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Optimizes soil/nutrient conditions for ...

    View full details
    Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69
  • Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69

    HEAVY 16 Bud A 2-0-3

    HEAVY 16

    HEAVY 16 BUD A • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Optimizes soil/nutrient conditions for ...

    View full details
    Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69
  • Original price $56.25 - Original price $356.95
    Original price
    $56.25 - $356.95
    $56.25 - $356.95
    Current price $56.25

    Xtreme Gardening TEA BREWS Easy-To-Use Compost Tea

    Xtreme Gardening

    Making compost tea has never been this easy, or this cost-effective. Xtreme Tea Brews are the most user-friendly, cost-effective method of brewing...

    View full details
    Original price $56.25 - Original price $356.95
    Original price
    $56.25 - $356.95
    $56.25 - $356.95
    Current price $56.25
  • Original price $27.50 - Original price $1,050.00
    Original price
    $27.50 - $1,050.00
    $27.50 - $1,050.00
    Current price $27.50

    Xtreme Gardening MYKOS WP Pure Mycorrhizal Wettable Powder

    Xtreme Gardening

    Mykos WP is a natural, organic species of beneficial soil fungi that creates a "sponge-like" mass which collects and stores nutrients and water, ...

    View full details
    Original price $27.50 - Original price $1,050.00
    Original price
    $27.50 - $1,050.00
    $27.50 - $1,050.00
    Current price $27.50
  • Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69

    HEAVY 16 Veg A 4-0-1

    HEAVY 16

    HEAVY 16 Veg A • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Optimizes soil/nutrient conditions for ...

    View full details
    Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69
  • Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69

    HEAVY 16 Veg B 1-2-5

    HEAVY 16

    HEAVY 16 Veg B • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Optimizes soil/nutrient conditions for ...

    View full details
    Original price $14.69 - Original price $1,784.99
    Original price
    $14.69 - $1,784.99
    $14.69 - $1,784.99
    Current price $14.69
  • Original price $104.99 - Original price $11,969.99
    Original price
    $104.99 - $11,969.99
    $104.99 - $11,969.99
    Current price $104.99

    HEAVY 16 Roots 0.7-1-2

    HEAVY 16

    HEAVY 16 Roots • Improved overall plant nutrition• Improves soil/nutrient conditions for root growth• Support soil conditions for greater root mass...

    View full details
    Original price $104.99 - Original price $11,969.99
    Original price
    $104.99 - $11,969.99
    $104.99 - $11,969.99
    Current price $104.99
  • Original price $13.99 - Original price $249.99
    Original price
    $13.99 - $249.99
    $13.99 - $249.99
    Current price $13.99

    FloraFlex Nutrients - B2™

    FloraFlex

    FloraFlex Nutrients are the highest quality, cleanest and most pH stable nutrients on the market. We are proud to bring you the first FloraFlex Nu...

    View full details
    Original price $13.99 - Original price $249.99
    Original price
    $13.99 - $249.99
    $13.99 - $249.99
    Current price $13.99
  • Original price $12.99 - Original price $224.99
    Original price
    $12.99 - $224.99
    $12.99 - $224.99
    Current price $12.99

    FloraFlex Nutrients - B1™

    FloraFlex

    FloraFlex Nutrients are the highest quality, cleanest and most pH stable nutrients on the market. We are proud to bring you the first FloraFlex Nut...

    View full details
    Original price $12.99 - Original price $224.99
    Original price
    $12.99 - $224.99
    $12.99 - $224.99
    Current price $12.99
  • Original price $13.99 - Original price $249.99
    Original price
    $13.99 - $249.99
    $13.99 - $249.99
    Current price $13.99

    FloraFlex Nutrients - V2™

    FloraFlex

    FloraFlex Nutrients are the highest quality, cleanest and most pH stable nutrients on the market. We are proud to bring you the first FloraFlex Nu...

    View full details
    Original price $13.99 - Original price $249.99
    Original price
    $13.99 - $249.99
    $13.99 - $249.99
    Current price $13.99
  • Original price $12.99 - Original price $224.99
    Original price
    $12.99 - $224.99
    $12.99 - $224.99
    Current price $12.99

    FloraFlex Nutrients - V1™

    FloraFlex

    FloraFlex Nutrients are the highest quality, cleanest and most pH stable nutrients on the market. We are proud to bring you the first FloraFlex Nu...

    View full details
    Original price $12.99 - Original price $224.99
    Original price
    $12.99 - $224.99
    $12.99 - $224.99
    Current price $12.99
  • Original price $25.50 - Original price $203.95
    Original price
    $25.50 - $203.95
    $25.50 - $203.95
    Current price $25.50

    Xtreme Gardening MYKOS ROOT PAKS Great For Hydro

    Xtreme Gardening

    MYKOS Root Paks are conveniently packaged in 10 gram "Biodegradable Paks" for both soil and hydroponic applications. Simply place the pak at the ...

    View full details
    Original price $25.50 - Original price $203.95
    Original price
    $25.50 - $203.95
    $25.50 - $203.95
    Current price $25.50
  • Original price $31.49 - Original price $3,254.99
    Original price
    $31.49 - $3,254.99
    $31.49 - $3,254.99
    Current price $31.49

    HEAVY 16 Finish 0-0-1

    HEAVY 16

    HEAVY 16 Finish • Improves overall plant nutrition• Improves efficiency of applied fertilizers• Supports conditions for better plant establishment ...

    View full details
    Original price $31.49 - Original price $3,254.99
    Original price
    $31.49 - $3,254.99
    $31.49 - $3,254.99
    Current price $31.49
  • Original price $52.49 - Original price $734.99
    Original price
    $52.49 - $734.99
    $52.49 - $734.99
    Current price $52.49

    HEAVY 16 Foliar 1-0-2

    HEAVY 16

    HEAVY 16 Foliar • Improves overall plant nutrition• Corrects calcium/magnesium-based plant disorders• Improves tolerance of abiotic stress In our q...

    View full details
    Original price $52.49 - Original price $734.99
    Original price
    $52.49 - $734.99
    $52.49 - $734.99
    Current price $52.49
  • Original price $94.49 - Original price $9,029.99
    Original price
    $94.49 - $9,029.99
    $94.49 - $9,029.99
    Current price $94.49

    HEAVY 16 Prime 0-0-3

    HEAVY 16

    HEAVY 16 Prime • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Supports microbial populations• Suppor...

    View full details
    Original price $94.49 - Original price $9,029.99
    Original price
    $94.49 - $9,029.99
    $94.49 - $9,029.99
    Current price $94.49
  • Original price $104.99 - Original price $11,969.99
    Original price
    $104.99 - $11,969.99
    $104.99 - $11,969.99
    Current price $104.99

    HEAVY 16 Fire 1-10-16

    HEAVY 16

    HEAVY 16 Fire • Improves overall plant nutrition• Improves soil/nutrient conditions for better crop yield• Provides organic matter• Improves soil c...

    View full details
    Original price $104.99 - Original price $11,969.99
    Original price
    $104.99 - $11,969.99
    $104.99 - $11,969.99
    Current price $104.99
  • Original price $15.49 - Original price $289.99
    Original price
    $15.49 - $289.99
    $15.49 - $289.99
    Current price $15.49

    FloraFlex Full Tilt Nutrients

    FloraFlex

    Full Tilt Nutrients is known for its ability to help plants grow faster and stronger, but that's not all. FloraFlex Full Tilt Nutrients also helps ...

    View full details
    Original price $15.49 - Original price $289.99
    Original price
    $15.49 - $289.99
    $15.49 - $289.99
    Current price $15.49
  • Original price $12.90 - Original price $865.58
    Original price
    $12.90 - $865.58
    $12.90 - $865.58
    Current price $12.90

    SUPERthrive Original Vitamin Solution

    SUPERthrive

    SUPERthrive is a highly concentrated solution of vitamins, minerals and natural plant hormones. SUPERthrive invigorates all variety of greenery ...

    View full details
    Original price $12.90 - Original price $865.58
    Original price
    $12.90 - $865.58
    $12.90 - $865.58
    Current price $12.90
  • Original price $21.50 - Original price $509.95
    Original price
    $21.50 - $509.95
    $21.50 - $509.95
    Current price $21.50

    Xtreme Gardening MYKOS Pure Mycorrhizal Inoculum

    Xtreme Gardening

    MYKOS is a concentrated mix of beneficial soil fungi that creates a "sponge-like" mass that improves the uptake of nutrients and water which incr...

    View full details
    Original price $21.50 - Original price $509.95
    Original price
    $21.50 - $509.95
    $21.50 - $509.95
    Current price $21.50
  • Original price $20.50 - Original price $34.75
    Original price
    $20.50 - $34.75
    $20.50 - $34.75
    Current price $20.50

    Xtreme Gardening CALCARB Foliar Booster

    Xtreme Gardening

    Add CalCarb to your indoor and outdoor gardening arsenal and create the perfect environment for your plants. CalCarb is a readily available sourc...

    View full details
    Original price $20.50 - Original price $34.75
    Original price
    $20.50 - $34.75
    $20.50 - $34.75
    Current price $20.50
  • Original price $69.95 - Original price $713.00
    Original price
    $69.95 - $713.00
    $69.95 - $713.00
    Current price $69.95

    Xtreme Gardening AZOS RED LIQUID Root Booster/Growth Promoter

    Xtreme Gardening

    Experience an improvement in plant establishment and accelerated plant growth with Xtreme Gardening AZOS Red Liquid, a naturally occurring nitro...

    View full details
    Original price $69.95 - Original price $713.00
    Original price
    $69.95 - $713.00
    $69.95 - $713.00
    Current price $69.95
  • Original price $21.45 - Original price $877.25
    Original price
    $21.45 - $877.25
    $21.45 - $877.25
    Current price $21.45

    Xtreme Gardening AZOS Root Booster/Growth Promoter

    Xtreme Gardening

    Azos offers an innovative and economical method for helping plants acquire the nitrogen they need to grow stronger and healthier. The proprietary...

    View full details
    Original price $21.45 - Original price $877.25
    Original price
    $21.45 - $877.25
    $21.45 - $877.25
    Current price $21.45
  • Original price $220.00 - Original price $380.00
    Original price
    $220.00 - $380.00
    $220.00 - $380.00
    Current price $220.00

    Silicium Silicic Acid

    Silicium

    Silicium is a pure nutrient that has revolutionized the world of horticulture, giving plants the necessary building blocks for growth. When added t...

    View full details
    Original price $220.00 - Original price $380.00
    Original price
    $220.00 - $380.00
    $220.00 - $380.00
    Current price $220.00
  • Original price $7.50 - Original price $42.99
    Original price
    $7.50 - $42.99
    $7.50 - $42.99
    Current price $7.50

    EZ-Clone Rooting Compound

    EZ-Clone

    EZ Clone Rooting Compound is a specially formulated rooting gel designed to initiate rapid, dense root growth in both softwood and hardwood cutting...

    View full details
    Original price $7.50 - Original price $42.99
    Original price
    $7.50 - $42.99
    $7.50 - $42.99
    Current price $7.50
  • Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00

    Athena Blended Balance Formula

    Athena

    Athena Balance is a simple formula of potassium silicate specifically concentrated to buffer irrigation water and stabilize to ideal pH. Silicon ad...

    View full details
    Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00
  • Original price $100.00 - Original price $1,600.00
    Original price
    $100.00 - $1,600.00
    $100.00 - $1,600.00
    Current price $100.00

    Athena Blended Stack Nutrients

    Athena

    Stack is a natural plant nutrient made from kelp extract. The nutrients in Stack encourage healthy growth and flowering. Stack gives the plant tool...

    View full details
    Original price $100.00 - Original price $1,600.00
    Original price
    $100.00 - $1,600.00
    $100.00 - $1,600.00
    Current price $100.00
  • Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00

    Athena Blended PK Supplement

    Athena

    Athena PK is a balanced bloom boosting complement to our Bloom fertilizers. This clean liquid booster is designed to supplement during the mid- to ...

    View full details
    Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00
  • Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00

    Athena Blended CaMg Supplement

    Athena

    Athena CaMg is designed to supplement either of our 2-part liquid formulas. Some cultivars and growing conditions may require higher doses of Calci...

    View full details
    Original price $45.00 - Original price $200.00
    Original price
    $45.00 - $200.00
    $45.00 - $200.00
    Current price $45.00
  • Original price $70.00 - Original price $300.00
    Original price
    $70.00 - $300.00
    $70.00 - $300.00
    Current price $70.00

    Athena Blended Cleanse Solution

    Athena

    Athena Cleanse is made from the ideal (and safe) root zone optimizing agents--Hypochlorous acid. This safe and mild acid is derived from salt and a...

    View full details
    Original price $70.00 - Original price $300.00
    Original price
    $70.00 - $300.00
    $70.00 - $300.00
    Current price $70.00
  • Original price $110.00 - Original price $110.00
    Original price
    $110.00
    $110.00 - $110.00
    Current price $110.00

    Athena Pro Core Nutrients 10lb Bucket

    Athena

    Athena Pro Core provides strong baseline nutrition across all stages of plant growth. Nitrogen to assemble chlorophyll and amino acids. Calcium to ...

    View full details
    Original price $110.00 - Original price $110.00
    Original price
    $110.00
    $110.00 - $110.00
    Current price $110.00
  • Original price $200.00 - Original price $200.00
    Original price
    $200.00
    $200.00 - $200.00
    Current price $200.00

    Athena Pro Core Nutrients 25lb Bag

    Athena

    Athena Pro Core provides strong baseline nutrition across all stages of plant growth. Nitrogen to assemble chlorophyll and amino acids. Calcium to ...

    View full details
    Original price $200.00 - Original price $200.00
    Original price
    $200.00
    $200.00 - $200.00
    Current price $200.00