We are open on Sundays! 10am-3pm
420 Sale Is Live – Huge Savings on Lights, Nutrients, and Seeds
Sale is good until 4/24/26
Celebrate 420 with some of the best deals of the year at Grow Big Hydro.
Take 25% OFF all nutrients, 20% OFF all seeds, and grab unbeatable pricing on high-performance LED lighting built for serious growers.
Neocision 680W LED Grow Light – $350 + tax
Built for full-cycle growth with powerful output and even canopy coverage.
Neocision 500W Veg LED – $225+ tax
Perfect for veg stages with efficient, balanced light distribution.
Grow Big Hydro
Located in Machesney Park, IL. Discover the largest selection of indoor gardening supplies in the area – everything you need to grow with confidence, all in one place.
(815) 637-4769
Call Us Now
Click To 815-637-4769 Now!
Visit Us Today
Product Categories
Grow Lights
Learn More
In Stock
Substrates & Soils
Plant Nutrients
Ventilation Systems
Seeds & Genetics
At Twenty20, we have always taken the difficult path, the right path, the path less traveled. Our objective will never be to sell the most seeds but to create the finest product. This is not a race and our goal isn’t to win; our goal is to stand the test of time and maintain our pride and craftsmanship in everything we do. As sure as the sun will rise, we pledge to never release seeds to the public that have not been grown, tested and approved by us. In a world of rapid-fire releases, social media hype and whimsical market demands, we promise to create our own path, march to the beat of our own drum, and always put quality over quantity.
Why Grow Big Hydro?
At Grow Big Hydro and Discount Gardening, we go beyond just selling supplies – we’re dedicated to helping our community thrive. Here’s why our customers keep coming back:
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Years of Expertise: With nearly two decades of experience serving Machesney Park and the surrounding areas, we know what works best for local gardeners. Our team is equipped with the knowledge and skills to guide you through every step of your growing journey.
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Locally Rooted: As a locally owned business, we’re deeply committed to our community. We understand the unique needs of Midwest indoor gardeners and are here to offer advice, support, and top-quality products tailored to your goals.
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Passionate, Knowledgeable Staff: Our staff isn’t just here to sell products – we’re here to help you succeed. Each member of our team is passionate about indoor gardening, always ready to offer tips, troubleshoot problems, and make sure you find exactly what you need.
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Unmatched Selection: From specialty soils and nutrient-rich substrates to high-performance grow lights and ventilation systems, we carry the largest selection of indoor gardening supplies in the region. Whatever your plants need to thrive, you’ll find it here at Grow Big Hydro.
Experience the difference of shopping with a store that genuinely cares about your success. Visit us today and let’s grow something amazing together!
Frequently Asked Questions (FAQ’s)
What types of products do you carry?
We offer a wide variety of indoor gardening supplies, including substrates, soils, soilless mediums, plant nutrients, grow light fixtures, and ventilation systems. Our store is fully stocked with everything you need to cultivate strong, healthy plants.
Do you provide advice on indoor gardening?
Yes! Our knowledgeable staff is passionate about indoor gardening and happy to help with advice, tips, and product recommendations tailored to your unique setup and goals.
Can you help me choose the right grow light for my plants?
Absolutely. We carry a range of grow lights for different plant needs and stages of growth. Our staff can help you select the best lighting solution for your indoor garden, whether you’re growing herbs, vegetables, or specialty plants.
Do you carry organic products?
Yes, we offer a variety of organic soils, nutrients, and other supplies. Just let us know your preferences, and we’ll guide you to the right options.
How often do I need to replace nutrients in my indoor garden?
It depends on the type of plants you’re growing and their stage of growth. Generally, we recommend refreshing nutrients often. Our team can provide guidance on the best nutrient schedule for your specific plants.
Where are you located, and what are your store hours?
We’re located at 5024 Willow Creek Road, Unit F, Machesney Park, IL 61115, and you can call us at (815) 637-4769 with any questions.
Growing Indoors Doesn’t Have To Be Hard…
BuildASoil makes potting soil and teaches an organic system called “The-BuildASoil-Way” so that growers can get really good results at home.
Stop in at Grow Big Hydro and see our selection!
Precision Nutrion for Maximum Yields!
A high-performance nutrient line designed for optimized plant growth, efficient nutrient uptake, and consistent results.
Now available in-store at Grow Big Hydro!
Discover CX Horticulture’s high-performance nutrients.
Brands We Carry
Visit Us
Grow Big Hydro Inc.
Mon: 11am – 7pm
Tue: 11am – 7pm
Wed: 11am – 7pm
Thu: 10am-5pm
Fri: 11am – 7pm
Sat: 10am-3pm
Sun: 10am-3pm
(815) 637-4769
5024 Willow Creek Rd
Unit F
Machesney Park, IL 601115
Customer Testimonials
Staff Is friendly and very Knowledgeable. They seem to really care about their customers and helping them figure things out. If they don’t have an answer they will tell you. If you are new to growing give these guys a call or stop in their store.
T.C.
Extremely knowledgeable at every level. Unlimited choice of products and supplies. If you want to learn how to grow healthy plants stop by grow big hydro!
Zach Bernhagen
Perfect in every sense. They help you figure out what is best for what plants you are growing. Huge selection of inventory. Customer support is top notch.
Doghouse Observatory
Once again proved why I love using grow big as my go to anything hydro, not to mention the amount of knowledge and selection! The owner went out of his way to make me one happy customer! Would recommend grow big to anyone and everyone!!
Brandon Conser
Extremely vast and extensive product line. Many different mediums to choose from, so many different nutrients in stock, and helpful friendly staff! Best grow shop I’ve been to hands down! If your growing your own medicine this is the place to go!!!
Gypsywanderer
Just so everyone knows, grow big is carrying full gallons and quart bottles of iso for some of the best prices around.
Trevor Klein
Very good selection of organic amendments. I’ve been back to the store more than 10 times now and always have a different question about growing. Even when they were busy they’ve answered my questions without hesitation. Thank you for your patience with an avid organic grower.
Drew Skeels
Owners is easily one of the most intelligent and innovative grow experts I’ve met. He will not only teach you something you don’t know but will help solve your issues what ever they may be, stand up guy!
Nick Glod
AJ and all his staff are extremely helpful and knowledgeable. They have very competitive pricing and are always helpful when I’m lost at what to do next. BONUS… Love love love the adorable puppy! She is so sweet!
Staci Todd
This place has a wide variety of supplies and the staff is very friendly and knowledgeable! Awesome atmosphere and decent prices. If you’re getting into growing check this place out!
JD