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Availability:
In Stock.
Arrives
Oct 28 – Nov 5
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Style: MaxiGro
Size: 50 lbs
Features
- Complete in primary, secondary and micro nutrients
- Provides superior results on a wide variety of crops
- For use in soil and hydroponic grows
Description
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micro nutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ encourages growth of seedlings, cuttings and stimulates rapid growth through the vegetative growth stage.
Brand: General Hydroponics
Item Weight: 50 pounds
Item Form: Powder
Liquid Volume: 800 fluid ounces
Specific Uses For Product: Hydroponics
Brand Name: General Hydroponics
Model Number: 718295
Global Trade Identification Number: 26
Number of Packs: 1
Manufacturer: General Hydroponics
Number of Items: 1
UPC: 793094012140 714639214409 793094012126
Unit Count: 800 Fluid Ounces
Included Components: B00598D0Q4
Item Type Name: For Vigorous Growth
Part Number: 718295
Item Form: Powder
Specific Uses For Product: Hydroponics
Coverage: Full
Target Species: Fruiting and Flowering Plants
Item Weight: 50 pounds
Liquid Volume: 800 fluid ounces
Mixing Ratio: Mix with water according to product label
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 28 – Nov 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: MaxiGro
Size: 2.2 lb
I use this with LECA and partial LECA (Boston ferns). Love it. Getting good growth. Great value. Should last me a year at least.
Reviewed in the United States on August 15, 2026 by dixydarling
Style: MaxiGro
Size: 2.2 lb
I've been using General Hydroponics MaxiGro for several months in my hydroponic setups, and the results have been phenomenal. My plants exhibit vigorous growth, with lush, green foliage and robust root systems. The 10-5-14 nutrient ratio seems perfectly balanced for the vegetative stage, providing all the essential macro and micronutrients. Mixing the powder is straightforward—it dissolves easily in water, and the included measuring scoop ensures accurate dosing. I appreciate that it's a one-part nutrient solution, simplifying the feeding process without compromising on plant health. One thing to note is that it can lower the pH of the solution, so monitoring and adjusting pH levels might be necessary, depending on your water source. However, this is a minor consideration given the overall performance. Reddit Overall, MaxiGro has become a staple in my gardening routine. It's cost-effective, easy to use, and delivers impressive results. I highly recommend it to both novice and experienced hydroponic gardeners.
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Reviewed in the United States on May 6, 2025 by ZK
Style: MaxiGro
Size: 2.2 lb
My first start into hydroponics. Following these instructions made the water perfect with pH and nutrients. Nice growth. Would continue to use.
Reviewed in the United States on July 21, 2026 by Joel
Style: MaxiGro
Size: 2.2 lb
Ok, I have a lot to say about this product, let me start with the good. A lot of the reviews I saw myself when purchasing this product talked about how amazing this plant food is, and how well their plants are doing. I had very similar results. I have a hydroponics setup with 36 basil plants growing, and they have absolutely exploded! I can't pick the basil fast enough! It has grown so fast that I have to plan dinners that involve a lot of it so it doesn't go to waste! After putting this nutrient solution powder into my hydroponic system, I got it professionally tested and it contained perfect amounts true to what plants need of Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, and other macronutrients. It really couldn't be simpler and cheaper with this powder...Once you have gotten it right. Now let's get into the bad things about this product. When I first added this to my nutrient solution reservoir in my hydroponics system, I thought everything was going great (I had lettuce growing at the time). By the time the lettuce got bigger though, it started to wilt. I tested the PH of the water and realized that the nutrient solution plummetted the PH to below 4! I quickly raised the ph and found another problem after some time. The nutrient powder didn't dissolve well into the water! After months of tragic trial and error, I finally found a foolproof way to get this nutrient powder to work well. Here are some steps below: 1. Make sure you buy a PH up solution because you will definitely need to raise the PH of the nutrient solution shortly after adding the powder. 2. You may want to add a water circulator or wave machine into your nutrient solution reservoir to encourage the constant circulation of water and prevention of the build-up of the powder on the sides of the reservoir. 3. Pre-dissolve the amount of powder you will need for your system in a little bit of hot water making sure to mix WELL. this will ensure that most of what's in the powder will be dissolved before you even pour the solution into your nutrient solution reservoir. If you follow these steps as I have, I'm certain you will have a better overall experience with this product, and you will get a higher yield from your plants. This one-step nutrient powder from general hydroponics is easy and I would recommend it...If you know how to do it properly.
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Reviewed in the United States on July 6, 2021 by Calvin
Style: MaxiGro
Size: 2.2 lb
I set up a pair of grow tents, lighting and hydroponics every fall in my house. I know what some folks may be thinking but I grow slicing and cherry tomatoes along with lettuce. The hydroponics are classic deep water using 5 gallon buckets and a bubbler. The MaxiGro product has been my go to fertilizer for years. I've never had the product clump, I am only doing a couple of tents so a bag will last the entire year and finally it dissolves well with little to no residue. The tomatoes and lettuce do fantastic with this product. The only extra amendments I may occasionally use are things such as commercial CalMag or my own diy calcium nitrate and magnesium sulphate mix. I've included a picture of one of the tents to show growth for the tomatoes from last year. I don't have any pictures of them with the tomatoes on the vines but a single tent over the winter produces enough that we end up having to give away the extras.
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Reviewed in the United States on September 9, 2025 by Michael Dx3
Style: MaxiGro
Size: 2.2 lb
MaxiGro is the easiest water soluble plant food for beginners (that has at least 9 of 12 nutrients). It's all-in-one so it's very simple to use compared to Masterblend 4-18-38 Complete Combo Kit. There were a few brown clumps (up to 1/4 tsp size) in the bag but rest of it was white. I was going to return this (due to brown clumps) but it made my microgreens (radish & peas) thrive. I've been avoiding big brown lumps and only use the white solids. For hydroponic microgreens, I use 50-100 ppm of nitrogen and 90-100 ppm of Epsom salt. Usually starting with lower ppm and gradually increasing ppm it as the plants grow. For 70 ppm of nitrogen, I use: 946 grams (147 ppm) hard water 9.5 pH water (about 4 cups). 1.35 grams (+700 ppm) MaxiGro (~1 flat tsp or 5.4 grams per gallon) -- dropped 9.5 pH to 6.0 pH. 0.19 grams (+65 ppm) Epsom salt (95 ppm total because 700 ppm of MaxiGro has 35 ppm Epsom salt). To make a gallon, multiply weights by 4. I dilute the first nutrient feed (about 72 hours after sowing seeds) by 25% to provide about 525 ppm of MaxiGro. Waiting 15-30 minutes before measuring PPM with a TDS meter allows time for MaxiGro to dissolve. Until I did this, I was using too much MaxiGro. I harvest microgreens within 6-14 days from start to finish, so your plants might require more MaxiGro if they are older and bigger. I also grow migrogreens on reusable silicone mats (dehydrator mats) without soil/coir/paper so you may need to adjust if you use soil containing nutrients.
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Reviewed in the United States on January 13, 2021 by Amazon Customer
Style: MaxiGro
Size: 2.2 lb
So far it works good.
Reviewed in the United States on August 24, 2026 by CityGrow
Style: MaxiGro
Size: 2.2 lb
Great plant food.
Reviewed in the United States on September 7, 2026 by Maria L. Auad