---
product_id: 6581975
title: "Bonide Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors"
brand: "bonide"
price: "€ 40.19"
currency: EUR
in_stock: true
reviews_count: 8
category: "Bonide"
url: https://www.desertcart.com.cy/products/6581975-bonide-rot-stop-tomato-blossom-end-rot-16-oz-concentrated
store_origin: CY
region: Cyprus
---

# fast-acting calcium boost foliar calcium absorption 16 oz concentrated liquid Bonide Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors

**Brand:** bonide
**Price:** € 40.19
**Availability:** ✅ In Stock

## Summary

> 🍅 Stop rot before it starts—boost your garden’s calcium game!

## Quick Answers

- **What is this?** Bonide Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors by bonide
- **How much does it cost?** € 40.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/6581975-bonide-rot-stop-tomato-blossom-end-rot-16-oz-concentrated)

## Best For

- bonide enthusiasts

## Why This Product

- Trusted bonide brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Results:** Foliar feeding delivers calcium fast to developing fruit and foliage after stress.
- • **Trusted Legacy:** Bonide’s proven formula since 1926, backed by 5,000+ glowing reviews.
- • **Calcium Powerhouse:** Corrects calcium deficiency to stop blossom end rot in tomatoes and more.
- • **Versatile Garden Hero:** Effective on cucumbers, melons, peppers—one solution for multiple crops.
- • **Effortless Application:** Mixes instantly with water for quick spray-on use with hose or tank sprayer.

## Overview

Bonide Rot-Stop is a 16 oz concentrated liquid fertilizer designed to correct calcium deficiency and prevent blossom end rot in tomatoes and other vegetables. It delivers fast-absorbing calcium via foliar feeding, is easy to mix and apply, and supports healthier, rot-free fruit development indoors and outdoors. Trusted by gardeners since 1926, it’s a versatile, proven solution for vibrant, thriving crops.

## Description

Rot Stop Tomato Blossom End Rot Concentrate Corrects calcium deficiency. Controls blossom end rot on tomatoes and other vegetables. Apply to developing fruit and foliage after periods of heavy rain or rapid growth. About Bonide: Bonide has been trusted since 1926 as the leader in providing the best possible products and solutions for home, lawn, and garden pest problems. Based out of Oriskany, New York, we continue to grow our reputation as a leader in the lawn and garden care categories by delivering the highest quality products alongside our great customer service. Our goal is to help consumers throughout their entire purchasing process by recognizing signs of trouble, developing the best solutions, and recommending the perfect products.

Review: Great Product! - Works very well! This product is the answer to blossom end rot. It is a liquid calcium treatment for tomatoes and peppers. Easy to use - directions say to mix 2 oz. per gallon of water in a watering can and pour over to drench the leaves of the plants. The plants get a quickly aborbed calcium boost and no more blossom end rot on the bottom of the tomatoes. I usually do 2 treatments a couple weeks apart as the fruit is coming on and it takes care of the entire growing season. I highly recommend this product!
Review: This stuff works! - I purchased this rot stop on a recommendation from my gardening friend. My tomatoes were getting a rotten spot on their bottoms. It is a concentrated liquid with a measuring cup as the lid. The mixing directions were easy to follow. The application directions not so easy. I wasn't sure if I was supposed to spray the actual plant or the tomatoes themselves. Turns out I was supposed to spray the soil. After a bit of trial and error, my tomatoes are coming along beautifully. I reapply every other week. The spray adds the needed calcium to the soil. This is a small bottle but it will easily take care of my small tomato garden this summer.

## Features

- CORRECTS CALCIUM DEFICIENCY - Our garden fertilizer is used to control blossom end rot on tomatoes by adding calcium to the plant.
- CONTAINS NUTRITIONAL CALCIUM - Plant food that uses nutritional calcium derived from calcium chloride as the main active ingredient.
- MULTIPLE USES - Rot Stop is also effective at correcting calcium deficiencies for cucumbers, melons, and peppers
- EASY TO APPLY - Product instantly mixes with water and should be applied using either a hose-end sprayer or tank sprayer. Simply spray foliage to the point of run-off. Make sure to carefully read and use according to label directions.
- FOLIAR FERTILIZATION - Intended as a supplement to a regular fertilization program and may not, by itself, provide all the nutrients normally required by crops or other intended plants.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #20,897 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #760 in Garden Fertilizers |
| Brand | Bonide |
| Customer Reviews | 4.5 out of 5 stars 5,113 Reviews |
| Global Trade Identification Number | 00037321001669 |
| Item Form | Liquid |
| Item Weight | 1.3 Pounds |
| Liquid Volume | 16 Fluid Ounces |
| Specific Uses For Product | Stop Tomato Blossom End Rot |

## Product Details

- **Brand:** Bonide
- **Item Form:** Liquid
- **Item Weight:** 1.3 Pounds
- **Liquid Volume:** 16 Fluid Ounces
- **Specific Uses For Product:** Stop Tomato Blossom End Rot

## Images

![Bonide Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors - Image 1](https://m.media-amazon.com/images/I/51AEEUzel2L.jpg)

## Questions & Answers

**Q: IS THIS A LIQUID THAT YOU MIX WITH WATER**
A: Yes, you mix 2 ounces with a gallon of water. I use a garden sprayer and spray the plants once a week until harvest. We had great success with this product last year and things are looking good for this year as well.

**Q: Can this be used on other plants like peppers or zucchini or is it just for tomatoes?**
A: Yes it can be used on any type of vegetable that would benefit from extra calcium.

**Q: is this organic?**
A: it is pure organic calcium when your soil is low in calcium that is what causes  end rot in your veggies. I have an degree in horticulture and own my own farm market . Been gardening over 30 years. you must applying weekly as once the plants get a taste of calcium that they were lacking naturally in the soil  they devour the calcium you spray on to get healthy again.Granted the instructions on the bottle are not the best. weekly is the best plan. trust  you will not be disappointed.

**Q: I have only 4 tomato plants. How much liquid of product do I mix with water for a one quart bottle sprayer?**
A: 1 tablespoon of the concentrated liquid per each quart of water. Spray liberally on all parts of plant surfaces. Provides needed calcium which is a common deficiency in all growing plants. Bonide 166 is concentrated Calcium Chloride solution. If you want extra nutrition, add .5 teaspoons of dry magnesium chloride crystals commonly known as Epsom salts. dsthornton_2005@yahoo.com

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product!
*by H***N on June 30, 2025*

Works very well! This product is the answer to blossom end rot. It is a liquid calcium treatment for tomatoes and peppers. Easy to use - directions say to mix 2 oz. per gallon of water in a watering can and pour over to drench the leaves of the plants. The plants get a quickly aborbed calcium boost and no more blossom end rot on the bottom of the tomatoes. I usually do 2 treatments a couple weeks apart as the fruit is coming on and it takes care of the entire growing season. I highly recommend this product!

### ⭐⭐⭐⭐⭐ This stuff works!
*by R***W on August 14, 2025*

I purchased this rot stop on a recommendation from my gardening friend. My tomatoes were getting a rotten spot on their bottoms. It is a concentrated liquid with a measuring cup as the lid. The mixing directions were easy to follow. The application directions not so easy. I wasn't sure if I was supposed to spray the actual plant or the tomatoes themselves. Turns out I was supposed to spray the soil. After a bit of trial and error, my tomatoes are coming along beautifully. I reapply every other week. The spray adds the needed calcium to the soil. This is a small bottle but it will easily take care of my small tomato garden this summer.

### ⭐⭐⭐⭐ Great
*by R***I on January 11, 2025*

Worked perfectly

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-06*