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๐ Unlock Bigger, Juicier Fruits with Every Feed!
Greenway Biotechโs 4-18-38 Tomato Fertilizer is a premium, water-soluble powder designed specifically for nightshade crops like tomatoes, peppers, and eggplants. Featuring a high-potassium formula with chelated micronutrients, it enhances fruit size, flavor, and shelf life while supporting strong root and bloom development. Perfect for hydroponic and soil systems, it dissolves completely without clogging and is rigorously tested for purity and safety. Trusted by gardeners since 1989, it delivers flexible application options for professional-grade yields.











| ASIN | B081ZF2H1B |
| Application Method | drip,foliar spray,soil drench |
| Best Sellers Rank | #74,497 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,624 in Garden Fertilizers |
| Brand | Greenway Biotech, Inc. |
| Brand Name | Greenway Biotech, Inc. |
| Coverage | vegetable gardens |
| Customer Reviews | 4.6 out of 5 stars 280 Reviews |
| Item Form | Liquid, Powder |
| Item Weight | 16 ounces |
| Liquid Volume | 1 quarts |
| Manufacturer | Greenway Biotech, Inc. |
| Mixing Ratio | 1/2 teaspoon per gallon of water or 3 grams per plant |
| Model Number | TB4-18-38 |
| Number of Packs | 1 |
| Part Number | Tomato_Parent |
| Specific Uses For Product | Hydroponic,Hydroponics |
| Target Species | tomatoes |
| UPC | 619206360483 |
| Unit Count | 16 Ounce |
S**A
Great Tomato Fertilizer for Bigger, Healthier Harvests!
Iโve been using this fertilizer on my tomatoes, peppers, and eggplants, and Iโve noticed a big improvement in both plant growth and fruit production. The plants have stronger stems, darker green leaves, and theyโre producing more blossoms than before. My tomatoes are growing larger, ripening evenly, and have a richer, sweeter flavor. It mixes easily with water, and a little goes a long way, making the 5-pound bag a great value. Iโm very happy with the results and will definitely keep using it throughout the growing season. Highly recommended for anyone looking to boost their garden harvest!
R**D
Excellent arrival and fertilizer
Received in a timely manner and product works great
C**.
Be careful - highly concentrated, very powerful.
This is an incredibly strong fertilizer. I fried 3 of my 13 plants with this at Dow of blue .75 - 1.5 tbl spoons per plant in. 3โ deep planter box of compost and organic potting s that Iโve been using for 2 years. I dig down about 3โ beside the plant and add the feet. I should have used a teaspoon. Fried my tomatoes and itโs companion herb fert fried my basil and oregano. The rosemary, tyhyme, sage and parsley along with the greens thrived.
M**.
This helped me with my plants
This helped me with my plants. My tomatoes plants reached over 8 feet tall.
C**S
Great product !
Bought this product late December 2017 along with a bag of nitrate and a carton of Epsom Salt. I am growing tomatoes in my little green house here in Orange County, CA. I use Home Depot 5 galleon buckets and fill it with pearlite. So far I am having the best success I have ever had. I am growing winter tomatoes along with Early Girl and am amazed at the amount of tomatoes and the health of the plants. No crunchy brown leaves, I take the companies suggestion to weigh the fertilizer and use,( as per the MPH Gardner formula, which is on Youtube ) 12 grams of the product along with 12 grams of the nitrate and 6 grams of Epsom Salts in 5 galleons of water....which gives you an 19-18-38 NPK. Obviously, I am very pleased and will continue to use the product to grow my veggies.
A**R
My favorite so far.
I have used this for the past few months as a base for all plants in my hydroponic garden. It is easy to mix and completely dissolves without using alot of mixing. As a general nutrient, I add calcium nitrate and magnesium sulfate differently for each plant. PPM / EC results are very predictable and accurate as described on the instructions. My mixes vary from EC 0.8 to 4.5 and I can hit the mark every time. PH does not go wild with this, it usually finished between 5.8 and 6.1 using Reverse Osmosis water. I have to do very little if any adjustments to the PH. Many liquid nutrients required heavy adjustments, not this. The resealable bag is rugged and designed to stand up without tipping or ripping. They do have a bulk option which I just purchased 25 lbs of each, tomato and calcium nitrate. It's the best so far. I grow tomatoes, bell peppers, Lettuce, cucumbers and flowers with this as a base for my hand mixed nutrients. Greenway Biotech is now my vendor for my nutrients. High quality at a reasonable price. You can't beat that.
S**D
My go to for tomato production.
Always happy with this and always get plenty of healthy tomatoes.
B**N
Iโm a believer!
This stuff works! I have way more fruit than my neighbors and I barely have to use any product. Itโs very concentrated. Look at my tomatoes thriving even without optimal weather conditions!
Trustpilot
2 weeks ago
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