Welcome back indoor gardeners!  Name brand atmospheric controllers now on sale! Check it out.

Growco Indoor Garden Supply opened for business in 1999
and we've been supplying both hobbyist and professional gardeners with quality merchandise through our retail store and website for over 10 years!  We're here to supply you with the best products that the industry has to offer, all at competitive and affordable pricing.

We spare no expense in our shipping
department to see that your order will reach you in perfect condition - satisfaction and privacy guaranteed!  We warehouse all of our products, and pride ourselves in getting your order to you fast!

 
Our staff has many years of hands-on experience
helping customers build grow rooms, dial in nutrient programs, and make seriously productive gardens.  Feel free to give us a call with any questions you may have, we're here to help you.

Private, secure online ordering.  No registration needed to order.  Satisfaction is guaranteed!

Retail store and Online since 1999! FREE SHIPPING on most orders totaling $250 or more when shipped to lower Continental USA! Stop in our retail store and experience a true grow shop! Our greenhouse is filled with bonsai trees and hydroponics systems, and all of our products are on display for you to check out in person.  We welcome your visit, and it will be worth your time to make the trip!  Map to our store THRIPS a problem? Check out our solutions!   Shipping & Payment Policies Privacy Protection Statement

What's new at Growco Indoor Garden Supply? Green Cap Bonsai Cut Paste - For use on conifers! Equalizer Hot Spot Diffuser - No more hot spots! Super-Spreader - Spread the light! Clonebox Large - Holds either T5 or T8 fluorescents! Hydrotek Cool Star Plus - We pre-wire the cordset! Digilux 600W MH Bulb - A true metal halide lamp! CANNA Coco Substrate - Organic coco coir! BIOCANNA Bio Boost - Organic bloom stimulator! BIOCANNA Bio Flores - OMRI listed - for flowering! BIOCANNA Bio Vega - Organic growth fertilizer! CANNA Cannazyme - Keeps root mass clean! CANNA Boost Accelerator - Larger tastier fruits! CANNA PK 13/14 - Stimulates flowering! Rhizotonic - Root stimulator from CANNA! CANNA Aqua Flores A & B - Bloom phase in hydro! CANNA Aqua Vega A & B - Growth stage for hydro! CANNA Terra Flores - 1-part soil flowering nutrient! CANNA Terra Vega - 1-part soil vegetative nutrient! CANNA Coco A & B - Just for coco grow media!

Why shop at 4hydroponics.com? FREE shipping on most orders totaling $250 or more when delivered in lower Continental USA.      (Sorry, Alaska and Hawaii not included.) Oversized or heavyweight items may not be included. NO sales tax when delivery is outside of Michigan. In some states that's a 10% savings! VERY competitive pricing. No registration needed to place an order. When we ship your order, magazines or catalogs are liberally included. (More info) Shipping to Michigan? Expect delivery within 2 business days! Read customer feedback here.

 
We apologize for the recent unreliability of our website. We have moved it to a new hosting company to permanently resolve these issues.

Brand Name Nutrients
Growing FAQ's
PPM / EC Conversions
Convert Liquid Volumes
Grow Light Tutorial
Light Bulb Tutorial
Hydroponics Tutorial