Specializing in indoor gardening and hydroponics growing!

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Growco Indoor Garden Supply has been supplying growers with the best quality organic fertilizers, hydroponics systems, and indoor gardening supplies since we opened our first retail store in 1999! Large Orders

We now have two incredible retail stores in West Michigan, and a dedicated full-time warehouse for our internet customers. We stock all of the items that you'll find on this website at the lowest possible price, and we always ship orders out on same day we receive them or on the next business day! We specialize in complete growroom packages, and we will gladly take the time to help you build the growroom of your dreams! Large orders, pallets of soil- whatever you need for your indoor garden- you've come to the right place, we're here to help!

Mills Nutrients

Remo Nutrients

Featured Products

Unique double ended constructions allows doe maximum optical efficiency and uniformity.
$16.95 - $109.95
B’Cuzz Blossom Builder increases the essential oil production of your plants increasing their size, scent, and flavor when the bloom.
Ozone is great at removing smoke, or strong pet smells. It kills mold and mildew in basements, and can eliminate powdery mildew on plants.
Heavy duty 5 gallon measuring bucket that is perfect for a variety of garden-related tasks.

Newest Additions

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CanaWipes feature a unique cleaning solution combined with durable towels to give you unmatched cleaning power.
$18.50 - $49.95
Remo's Nature's Candy is an authentic blend of Carbohydrates and amino acids that are beneficially of plant development. Resulting in some of the most remarkable growth you will ever have.
$24.95 - $69.95
This precise blend of fossilized organics target the specific areas of your plant that control bud development and assists with the production of essential oils and aromatics, and increasing potency.
$36.50 - $199.95
VeloKelp’s amazing formula is packed with vitamins and multiple seaweed extracts, specifically created to support a thriving garden.
$16.95 - $33.95
MagnifiCal has been specially designed speed up absorption rates and can start affecting your plants within a couple of hours after use.
$14.50 - $23.79
Our powerful gel ensures consistent results every time. Remo’s Roots’ unique formula seals your cut immediately and saturates the area with multiple rooting compounds.
$14.50 - $73.95
REMO Grow brings a quality and simplicity to your garden. REMO only uses pharmaceutical grade minerals, marine extracts and the finest chelates to ensure consistency and pH balance.
$14.50 - $73.95
REMO Bloom is part of a three part system. This proprietary blend of macro and micronutrients provide your harvest with the foundation needed to achieve maximized growth.
$20.00 - $73.95
Remo’s Micro is created to be used throughout the full growth cycle, in equal amounts with Grow or Bloom to compliment and complete the macro and micronutrients needed for plants.
With chelates absorbed into your plants, you can expect nothing but high quality micro nutrients and an amazing garden. Advanced Nutrients pH Perfect Micro is the way to go!
Advanced pH Perfect bloom will give you the healthiest plants around. You will get the most of your money with this concentrated blend.
Advanced Nutrients pH perfect Grow is the perfect ingredient you need to enhance the growth of your plants by giving them all the essential nutrients they need.
$17.95 - $57.95
As you’re aware,your plants grow by absorbing compounds from nutrients, water, and the atmosphere. It’s important for you to realize that Flawless Finish is the only formula made for your plants. That’s crucial because different species of plants respond in different ways to pre-harvest flushing, and because the testing and design of hydroponics flushing products has a direct bearing on whether those products work for you or not
Plants simply love the LEC-315 lights! The LEC-315 "Commercial" fixtures are made to be run on higher than standard household wattage for specialized greenhouse applications.
If you’re an experienced grower looking to get the absolute most out of your plants in their bloom phase, then the pH Perfect Connoisseur Bloom two part base nutrient is the product for you.
$3,500.00 - $4,500.00
The B-Pod Rotating Garden- "The Buzz starts with B-Pod!" The B-Pod line is the ideal rotary growing system for beginners as well as skilled users. The wheel rotates slowly, and the flood tray is filled to coincide with a single rotation of the wheel so all of the plants will receive water and nutrients.

We always ship in heavy-duty plain brown boxes, and our 15 years of shipping experience help to insure that you will receive your order intact and undamaged every time! 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. Huge selection, low prices, and fast shipping- Growco wants to be your favorite grow shop! Let us help you learn to grow like a pro!

Private, secure online ordering. No registration needed to order. We strive for your complete satisfaction - we want to be your "go-to" source for performance gardening supplies!

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!

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Garden Watchdog Top 5 Organic Seeds in stock Hydro for Hunger participant OMRI Listed
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