---
product_id: 4489515
title: "Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants"
brand: "bonide"
price: "$U1828"
currency: UYU
in_stock: true
reviews_count: 8
category: "Bonide"
url: https://www.desertcart.uy/products/4489515-bonide-rot-stop-tomato-blossom-end-rot-32-oz-ready
store_origin: UY
region: Uruguay
---

# foliar spray for quick calcium absorption targets blossom end rot in tomatoes & more 32 oz ready-to-use liquid Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants

**Brand:** bonide
**Price:** $U1828
**Availability:** ✅ In Stock

## Summary

> 🍅 Stop rot before it starts — your garden’s secret weapon!

## Quick Answers

- **What is this?** Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants by bonide
- **How much does it cost?** $U1828 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/4489515-bonide-rot-stop-tomato-blossom-end-rot-32-oz-ready)

## 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

- • **Multi-Veggie Defense:** Effective on tomatoes, cucumbers, melons, and peppers to prevent rot and promote healthy growth.
- • **Instant Calcium Boost:** Delivers essential calcium directly to foliage for rapid correction of deficiencies.
- • **Effortless Application:** Ready-to-use formula mixes instantly with water; compatible with hose-end or tank sprayers.
- • **Precision Foliar Feeding:** Spray to runoff ensures optimal nutrient uptake without over-application risks.
- • **Trusted Garden Essential:** Highly rated solution (#1,345 in Garden Fertilizers) with proven results and strong user satisfaction.

## Overview

Bonide Rot-Stop Tomato Blossom End Rot is a 32 oz ready-to-use liquid spray designed to correct calcium deficiency in plants, preventing blossom end rot primarily in tomatoes but also effective for cucumbers, melons, and peppers. It delivers calcium chloride via foliar feeding for fast absorption, is easy to apply with common sprayers, and serves as a vital supplement to regular fertilization programs. Highly rated and trusted by gardeners, it offers a practical, proven solution to keep your produce healthy and rot-free.

## Description

BONIDE Rot-Stop® Tomato Blossom Set Spray prevents end rot in tomatoes and other vegetables. It controls calcium deficiency to prevent end rot.

Review: ABSOLUTELY HEALTHIER PLANT ALMOST INSTANTLY - I was disappointed with seeing End Rot on my plants since I felt that I had done everything right with planting my tomato plants but there it was. I researched my options for treating it and this was highly recommended. I honestly had my doubts, a spray to fix a calcium issue, but it was absolutely effective with only one use.......WOW!! The value was worth every penny because I only lost the first tomato that I saw with it. The size was worth the price, great value. I didn't pay attention to the plant growth since I did not purchase this product for growth but I would have to say, my plants grew taller than expected and absolutely beautiful tomatoes.
Review: AMAZING---noticed improvement in my tomato rot problem after just one application! - I am so pleased with this product! It allowed me to enjoy tomatoes by nourishing the plants producing rotten ones to stop doing that! I will warn that it is so important to not overkill applying---it mentions applying until it runs off. I think that is a little too much. It makes the plants burn from the sun easy and scaled them back a bit before they grew back. I would just apply enough to spray in each section and then stop--do not keep spraying until run off--they will burn! I have only had to apply once or twice to each plant affected this season, not every week.

## 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 | #53,501 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,345 in Garden Fertilizers |
| Brand | Bonide |
| Customer Reviews | 4.1 out of 5 stars 1,664 Reviews |
| Global Trade Identification Number | 00037321001676 |
| Item Form | Liquid |
| Item Weight | 2.3 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Specific Uses For Product | Plant Food |

## Product Details

- **Brand:** Bonide
- **Item Form:** Liquid
- **Item Weight:** 2.3 Pounds
- **Liquid Volume:** 32 Fluid Ounces
- **Specific Uses For Product:** Plant Food

## Images

![Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants - Image 1](https://m.media-amazon.com/images/I/51Pi1ya0zzS.jpg)
![Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants - Image 2](https://m.media-amazon.com/images/I/61oc0pCkE0L.jpg)
![Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants - Image 3](https://m.media-amazon.com/images/I/71iDOY47QYL.jpg)
![Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants - Image 4](https://m.media-amazon.com/images/I/71t65wJ8BkL.jpg)
![Bonide Rot-Stop Tomato Blossom End Rot, 32 oz Ready-to-Use Spray Garden Fertilizer for Calcium Deficiency in Plants - Image 5](https://m.media-amazon.com/images/I/81dmcR-Z6dL.jpg)

## Available Options

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

## Questions & Answers

**Q: is this safe to use up to date of harvest?**
A: We would recommend if you are applying on the day of harvest to make sure you thoroughly wash fruit and/or vegetables before consuming.

**Q: Is there expiration on this product**
A: According to a representative; I assume..   "A: We do not have expiration dates on our products. This is the manufacturing date. We recommend using our products 5-7 years from manufacturing date when properly stored."

**Q: Will this help Stem rot cure?**
A: Stem rot is caused by overwatering (or having mulch piled up around the stem) or from disease. Tomato blossom rot is caused by the inability of calcium and other nutrients to be able to make it into the blossom/tomato for good development and growth which can be a combination of lack of water and/or lack of nutrients in the soil. I use the the Bonide  Rot-Stop as part of my defense against blossom end rot as I can only grow my plants in pots on my deck. An "empty jelly" section in a tomato combination of lack of water and/or lack of nutrients and that it almost ended up being thrown away because of end rot.

**Q: Can this work  on watermelon plants?**
A: The label says it works on melons, but it has to be sprayed on the buds when they first appear.

## Customer Reviews

### ⭐⭐⭐⭐⭐ ABSOLUTELY HEALTHIER PLANT ALMOST INSTANTLY
*by J***S on October 26, 2025*

I was disappointed with seeing End Rot on my plants since I felt that I had done everything right with planting my tomato plants but there it was. I researched my options for treating it and this was highly recommended. I honestly had my doubts, a spray to fix a calcium issue, but it was absolutely effective with only one use.......WOW!! The value was worth every penny because I only lost the first tomato that I saw with it. The size was worth the price, great value. I didn't pay attention to the plant growth since I did not purchase this product for growth but I would have to say, my plants grew taller than expected and absolutely beautiful tomatoes.

### ⭐⭐⭐⭐⭐ AMAZING---noticed improvement in my tomato rot problem after just one application!
*by B***4 on August 15, 2024*

I am so pleased with this product! It allowed me to enjoy tomatoes by nourishing the plants producing rotten ones to stop doing that! I will warn that it is so important to not overkill applying---it mentions applying until it runs off. I think that is a little too much. It makes the plants burn from the sun easy and scaled them back a bit before they grew back. I would just apply enough to spray in each section and then stop--do not keep spraying until run off--they will burn! I have only had to apply once or twice to each plant affected this season, not every week.

### ⭐⭐⭐⭐ Be careful - can easily burn plants
*by K***C on July 26, 2025*

This product seems to work effectively. I had several roma plants that were suffering due to torrential rain. It depleted the calcium and the end rot showed up. Although this is diluted, be very careful when applying. I applied in the evening when it was cool, I only placed on the leaves and fruit and tried not to over saturate but I still had many leaves that turned brown. The product seemed to work well though in spite of the issues because new fruit does not have end rot and the plants are all blooming nicely.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-12*