Is there a kit available that contains the master blend, and also the calcium nitrate and magnesium sulfate . sure would be nice .

Yes, sold in amazon and work great. Instructions on the bag and good price.

What the best way to adjust EC if its to low and you already mixed all 3 parts together

First, you should not mix the calcium nitrate together with the master blend and magnesium sulfate (EPSON salts) at the same time. Mix the master blend and EPSON salts together and mix the calcium nitrate separately before adding to your nutrient solution. When you mix all 3 together at the same time it binds up the nutrients and they can’t release properly. See if mixing them separately before adding helps.

Can this fertilizer be applied directly to container plants or must it only be used in a hydroponic system?

Container plants will love this. I top dress soil and water in. I also measure it in filtered water to apply. It's very good stuff.

Newby here, I have an organic container garden, are this supplements synthetic? I purchased this and not sure if I should use it.

Totally synthetic, so now what?

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MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound)

MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound)

Product ID: 43589230

Details

Brand
MasterBlend
Item Form
Powder
Item Weight
16 ounces
Number of Packs
3
Specific Uses For Product
Hydroponic

🌱High concentration: 4-18-38 NPK ratio for optimized growth

💧100% water soluble for instant nutrient delivery

📦Bulk options: 1, 5, or 25 lbs to fit any scale

2715 Ft

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Description

🌿 Grow like a pro — Master your garden’s potential with MasterBlend!

TRUSTED BY PROS - Preferred by commercial growers and hydroponic enthusiasts alike
HYDROPONIC READY - Perfectly soluble powder designed for seamless hydroponic and soil use
FLEXIBLE BULK SIZES - Choose from 1, 5, or 25 pounds to match your garden’s ambition
TRACE MINERAL BOOST - Includes all essential trace minerals for balanced, healthy plants
PRECISION NUTRIENT FORMULA - Tailored 4-18-38 NPK ratio fuels robust tomato & vegetable growth

MasterBlend 4-18-38 Tomato & Vegetable Fertilizer is a highly concentrated, 100% water-soluble powder designed for hydroponic and soil gardening. Available in bulk sizes from 1 to 25 pounds, it delivers a precise nutrient balance with essential trace minerals, making it a top choice for commercial growers and home gardeners aiming for vibrant, healthy tomatoes and vegetables.

Specifications

ASIN	B071HB13XR
Best Sellers Rank	#53,803 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,207 in Garden Fertilizers
Brand Name	MasterBlend
Coverage	Medium
Customer Reviews	4.6 4.6 out of 5 stars (472)
Item Form	Powder
Item Weight	16 ounces
Manufacturer	MasterBlend
Mixing Ratio	12:6:12
Model Number	MASTERBLEND 4-18-38 (1 POUND)
Number of Items	1
Number of Packs	3
Part Number	MASTERBLEND 4-18-38 (1 POUND)
Specific Uses For Product	Hydroponic
Target Species	tomatoes and vegetables
UPC	600150826019
Unit Count	16 Ounce

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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2715 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered 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 Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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