Does anyone know how much to put in per gallon for a Hydroponic setup?

This is for 5 gallons. I have been using this for tomatoes works great. 12 grams of the fertilizer. 12 grams calcium nitrate. 6 grams Epsom salt . You need gram scales. 28 grams in an ounce so not hardly half an ounce

I'm growing tomatoes and peppers in 20 gal. containers, what else do I need to go with this fertilizer?

Calcium nitrate and Epsom salt is all that's needed along with this. If in soil no need for pH down but if you using soiless mediums then just pH down your solution about 1/4 teaspoon to 2mls hope this helps. :)

As side dressing when tomato plant is already producing large tomatoes, how to use? sprinkle on soil or mix in water and pour on soil around root??

Hello, You can use either way. If you would like to use for a liquid application you will need to dissolve 2.5 grams of fertilizer per gallon of water, and then poor onto soil. Depending on the quality of the soil amounts vary, but one gallon of solution should be enough for about 15 to 20 adult tomato plants.

Can you put this straight into the reservoir of wicking tubs?

Hello, You can add it straight to the tubs but we usually recommend dissolving in a bit of water first for easier mixing.

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Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 25 LB

Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 25 LB

Product ID: 38707094

Details

Brand
Greenway Inc.
Item Form
Powder
Item Weight
25.2 pounds
Liquid Volume
1 liters
Specific Uses For Product
Hydroponic

🍅4-18-38 NPK ratio for max fruit yield

💧100% water soluble, clog-free formula

🧪Chelated micronutrients for pH 4-9 availability

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Description

🍅 Grow Bold, Flavorful, and Unstoppable Nightshades!

EFFORTLESS APPLICATION - Dissolves completely in room temp water—perfect for soil drench, foliar spray, drip irrigation, NFT, DWC, and Dutch buckets.
TRUSTED PURITY SAFETY - CDFA-registered and batch-tested for heavy metals, giving pros and home growers peace of mind.
MICRONUTRIENT POWERHOUSE - EDTA-chelated Iron, Manganese, Zinc, Copper, Boron & Molybdenum ensure nutrient uptake in any soil or hydro system.
ALL IN ONE NIGHTSHADE SOLUTION - One formula covers your entire nightshade garden from heirloom tomatoes to hot peppers and potatoes.
PRECISION NIGHTSHADE NUTRITION - Optimized 4-18-38 formula fuels bigger, tastier tomatoes, peppers, and eggplants without excess foliage.

Greenway Biotech's Tomato Fertilizer 4-18-38 Powder is a professional-grade, water-soluble nutrient blend engineered specifically for nightshade crops. Featuring a high potassium formula with chelated micronutrients, it promotes larger fruit size, enhanced flavor, and longer shelf life while preventing excessive foliage growth. Suitable for hydroponic and soil applications, it dissolves fully without clogging irrigation systems. Registered with the California Department of Food and Agriculture and rigorously tested for purity, this 25 lb powder is the trusted choice for serious gardeners aiming for premium harvests.

Specifications

ASIN	B01MZIJ35S
Best Sellers Rank	#55,218 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,347 in Garden Fertilizers
Brand Name	Greenway Biotech, Inc.
Coverage	25
Customer Reviews	4.6 4.6 out of 5 stars (280)
Item Form	Powder
Item Weight	25.2 pounds
Liquid Volume	1 liters
Manufacturer	Greenway Biotech, Inc.
Mixing Ratio	4:18:38
Number of Items	1
Number of Packs	1
Part Number	Tomato_Parent
Specific Uses For Product	Hydroponic,Hydroponics
Target Species	Tomatoes
UPC	018227120944
Unit Count	400 Ounce

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2355.77 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

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