---
product_id: 8452257
title: "Greenway Biotech Calcium Nitrate Solution Grade 15.5-0-0 Fertilizer Contains 15.5% Nitrogen & 19% Calcium for Tomatoes, Plants- Water Soluble Hydroponics Fertilizers for Vegetables (10 Pounds)"
brand: "greenway biotech, inc."
price: "S$163"
currency: SGD
in_stock: true
reviews_count: 8
url: https://www.desertcart.sg/products/8452257-greenway-biotech-calcium-nitrate-solution-grade-15-5-0-0
store_origin: SG
region: Singapore
---

# 15.5% Nitrogen boosts vigorous plant growth 100% water soluble for rapid nutrient uptake 19% Calcium strengthens cell walls & fruit quality Greenway Biotech Calcium Nitrate Solution Grade 15.5-0-0 Fertilizer Contains 15.5% Nitrogen & 19% Calcium for Tomatoes, Plants- Water Soluble Hydroponics Fertilizers for Vegetables (10 Pounds)

**Brand:** greenway biotech, inc.
**Price:** S$163
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow Strong, Harvest Long – The Calcium Powerhouse Your Garden Craves!

## Quick Answers

- **What is this?** Greenway Biotech Calcium Nitrate Solution Grade 15.5-0-0 Fertilizer Contains 15.5% Nitrogen & 19% Calcium for Tomatoes, Plants- Water Soluble Hydroponics Fertilizers for Vegetables (10 Pounds) by greenway biotech, inc.
- **How much does it cost?** S$163 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/8452257-greenway-biotech-calcium-nitrate-solution-grade-15-5-0-0)

## Best For

- greenway biotech, inc. enthusiasts

## Why This Product

- Trusted greenway biotech, inc. brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Heat Stress Resistance:** Boosts plants’ heat tolerance, reducing stress in warmer climates for consistent, high-quality yields.
- • **Rapid Nutrient Absorption:** 100% water soluble formula ensures fast-acting nitrogen and calcium delivery for immediate plant nourishment.
- • **Versatile Hydroponic & Soil Use:** Perfectly tailored for hydroponics, vegetables, fruits, and a wide range of plants—grow your garden without limits.
- • **Enhanced Fruit Quality & Shelf Life:** Calcium fortifies cell walls, resulting in stronger, more resilient fruits with longer freshness.
- • **Prevents Calcium Deficiency Disorders:** Effectively combats tip burn in lettuce and rust spots in potatoes, keeping your crops healthy and market-ready.

## Overview

Greenway Biotech Calcium Nitrate Solution Grade is a premium 10-pound fertilizer delivering 15.5% nitrogen and 19% calcium in a fully water-soluble formula. Designed for hydroponics and soil applications, it accelerates nutrient uptake, enhances fruit quality, prevents calcium deficiency disorders, and improves heat stress tolerance—perfect for professional growers aiming for superior, market-ready produce.

## Description

Full description not available

## Features

- 100% WATER SOLUBLE: Greenway Biotech Calcium Nitrate Solution Grade Fertilizer 100% Water Soluble that provides fast-acting nitrogen along with calcium to increase fruit quality.
- WIDE USAGE: Our calcium nitrate water soluble fertilizer is ideally use for Hydroponics. It can also be used in hydroponics growers, vegetables, fruits, tomatoes, peppers, broccoli, Brussels sprouts, plants and more!
- GREAT SOURCE OF NUTRIENTS: Providing the correct amount of nutrients to your plants with our high quality of plant fertilizer. Calcium improves cell wall strength, which leads to higher-quality fruits with a longer shelf-life.
- GREAT FOR CALCIUM DEFICIENCY: The water soluble calcium nitrate also helps to prevent tip burn in lettuce and rust spot in potatoes, both of which result from calcium deficiencies. Adequate calcium levels help to reduce stem rot in broccoli plants, allowing for larger heads.
- WHAT INCLUDED: This calcium nitrate for plants contains 15.5% Nitrogen and 19% Calcium which increases heat-tolerance and helps to reduce the amount of heat stress experienced by plants in warmer climates.

## Product Details

- **Brand:** Greenway Biotech, Inc.
- **Item Weight:** 10 Pounds
- **Item Form:** Liquid
- **Specific Uses For Product:** Hydroponics
- **Manufacturer:** Greenway Biotech

## Images

![Greenway Biotech Calcium Nitrate Solution Grade 15.5-0-0 Fertilizer Contains 15.5% Nitrogen & 19% Calcium for Tomatoes, Plants- Water Soluble Hydroponics Fertilizers for Vegetables (10 Pounds) - Image 1](https://m.media-amazon.com/images/I/71dV-7lu5UL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: what is the recommended dilution rate per gallon for this product?**
A: First, dissolve 2 pounds dry calcium nitrate in 1 gallon of water to make a liquid concentrate.  Then use 1/2 oz of the liquid concentrate per gallon of water on your plants.

**Q: This says it's 15.5% nitrogen and 19% calcium--what's the other 65.5%?**
A: It is mostly water. Calcium Nitrate formula is Ca(NO3)2.4H2O and that shows 4 molecules of water.

**Q: Will it help mangoes trees?**
A: Hello,

This product will work well for your trees if they are deficient in Nitrogen and Calcium.

**Q: Can it be added to the water reservoir of a grow box?**
A: Yes but it is like a teaspoon per quart. 
It stops your tomato plants from getting blight.  I use every year with great results. You can actually spray it on the fruit as they begin to grow. No need to spray the plant. Just spray the fruit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Just what I needed.
*by G***9 on September 22, 2025*

I have an hydroponic greenhouse, and add this to my solution. I wish the granules came in a watertight container though,as the bag leaked out in the shipping box,

### ⭐⭐⭐⭐⭐ Calcium nitrate
*by J***A on September 8, 2025*

Although this is more expensive than some others brand I’ve tried, I will always buy choose this over the cheaper brand. It mix well and very clean and works great

### ⭐⭐⭐⭐ GOOD QUALITY AT BEST PRICE
*by A***R on May 15, 2024*

NO LUMPS.

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-23*