Specializing in indoor gardening and hydroponics growing!
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!
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
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What's new at Growco Indoor Garden Supply?
400W Digilux MH bulb - Burns horizontal or vertical!
Digilux 1000W MH - Higher red/orange spectrums!
Carson zOrb Digital Microscope - 35X on your PC!
Phresh Filters - Half the weight plus twice the CFM!
Powerbox DPC-7500 Combo - 240V & 120V outlets!
Powerbox Flipbox - Runs 2 hoods on 1 ballast!
Powerbox DPC-7500 120V - Controls 6 HID lights!
Powerbox DPC-7500 - The 240V, 6 outlet controller!
Reflective Sheeting - Now in its own category!
ORCA Grow Film - Full spectrum light reflectance!
CAP MLC12X+4 - Light control for 12 HID systems!
CAP MLC20+4 - 20 unit master lighting controller!
24 HID Light Controller - The largest made by CAP!
BushDoctor Kangaroots - Organic root builder!
BushDoctor Microbe Brew - Microbial inoculate!
BushDoctor Sledgehammer - Clean those roots!
Oakton Multi PT Testr 35 - Temps, pH and TDS!
GroZone Dual-Zone CO2 Controller - Runs 2 areas!
VSC-DNe Variable Fan Speed Controller - Day/Night!
Raptor 8" Air Cooled Reflector - One of the big boys!
BioAg Ful-Power - The champagne of Humic Acids!
45" Vertical Reflector and Housing Unit - From HF!
Why shop at 4hydroponics.com?
◊ FREE shipping on most orders $250 or more when delivered in lower Continental USA. (Sorry, Alaska and Hawaii not included.) Oversized or heavyweight items not 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)
◊ Read customer feedback here.
Shipping to Michigan? Expect delivery within 2 business days!
Pest & Disease Control
pH, EC/TDS, PPM Controllers, Monitors & Testers
Plant pots and containers
Pumps and Plumbing
Reservoirs and Trays
Timers and HID Controls
All Hydroponics Systems
Combo Hydroponics / Grow Light Packages
Deep Water Culture (passive) Hydroponics
Drip (Top-Feed) Hydroponics Systems
Ebb & Flow Hydroponics Systems
Grow Tents (closet hydroponics)
Pumps, Plumbing and Parts
Reservoirs and Plant Trays
Rotating Hydroponics Systems
Tutorial - Hydroponics
Vertical Hydroponics Gardens
Nutrients and Fertilizers:
Cloning Nutrients / Solutions
Bonsai Tools & Supplies:
Digging and Root Tools
Misters and Measurers
Nutrients and Fertilizers
Potting Tools and Growing Mediums
Shears and Trimmers
Wire, Wire Cutters and Pliers
Questions and Answers (FAQ):
Bat Guano Fertilizers
Can-Fan / Can-Filter Setup
General Questions & Answers
Grow Seedling in Ebb & Flow
Growing Vegetables Indoors
Growroom Odor Control
Heat Control in Growroom
LED Growlight Facts
Root Rot and Hydroponic Systems
Winter Survival for Houseplants
Feeding Charts / Application Rates
Sale Items with special pricing
Track Your Order
Call or email us for quantity discounts!
FREE SHIPPING on orders totaling $250 or more
when delivered within lower continental USA!!!
Bonsai Tools Books / Reference Material Cloning Grow Room Healthy Lifestyles Hydroponics
Lighting (Grow Lights / Replacement Bulbs) Nutrients and Fertilizers Home
Customer Comments Product List Search Website Shipping Policies Track Order
Growco Indoor Garden Supply
1042 Michigan NE Grand Rapids, Michigan USA 49503-1908
phone: (616) 454-6900 toll free: 877-939-6900