---
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: "€ 42.94"
currency: EUR
in_stock: true
reviews_count: 8
category: "Bonide"
url: https://www.desertcart.fr/products/4489515-bonide-rot-stop-tomato-blossom-end-rot-32-oz-ready
store_origin: FR
region: France
---

# 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:** € 42.94
**Availability:** ✅ In Stock

## Summary

> 🍅 Stop rot, start thriving — your garden’s calcium hero!

## 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?** € 42.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/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

- • **Proven Results Fast:** Users report visible improvement after just one application—don’t miss out on thriving harvests.
- • **Multi-Veggie Defense:** Protects tomatoes, cucumbers, melons, and peppers from blossom end rot and calcium-related disorders.
- • **Instant Calcium Boost:** Delivers essential calcium directly to foliage for rapid correction of deficiencies.
- • **Effortless Application:** Ready-to-use formula sprays easily with hose-end or tank sprayers—no mixing hassle.
- • **Optimized Plant Health:** Supports healthier, more vibrant plants as a perfect supplement to your regular fertilization routine.

## Overview

Bonide Rot-Stop Tomato Blossom End Rot is a 32 oz ready-to-use foliar spray designed to correct calcium deficiency in tomatoes and other vegetables. Using calcium chloride as its active ingredient, it prevents blossom end rot and supports healthier plant growth. Easy to apply with hose-end or tank sprayers, it’s a must-have supplement for any serious gardener aiming to maximize yield and quality.

## 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 |
|---------------|-------|
| ASIN | B000OWB63O |
| Best Sellers Rank | #73,256 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,846 in Garden Fertilizers |
| Brand | Bonide |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,665) |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00037321001676 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 2.3 pounds |
| Item model number | 167A |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Bonide |
| Number of Items | 1 |
| Product Dimensions | 2.5 x 4.88 x 11.88 inches |
| Specific Uses For Product | Plant Food |
| UPC | 037321001676 |
| Unit Count | 32.0 Ounce |

## 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/71iDOY47QYL.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/81dmcR-Z6dL.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/81ubMkWSQUL.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/71t65wJ8BkL.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.

### ⭐⭐⭐⭐ It Works Really Well. Best To Buy It Locally.
*by K***E on August 3, 2025*

Even though I always use bone meal, fertilizer, and/or compost, one of my potted tomato plants was churning out nothing but tomatoes with blossom end rot. Sometimes the balance is off where a plant just has trouble absorbing nutrients through its roots, and amending the soil just doesn't seem to work in a timely fashion. After all, a plant only has so much time to put out new fruit for the season and it is too late to start a new plant. I bought this hoping that a foliar spray might work. I tried it out, making sure that it was in the early evening, so it wouldn't burn the foliage. It worked really well. Within just one week, all of my new ripening tomatoes are coming out just fine now. The spray bottle didn't leak or clog, like many on the market annoyingly do. The only gripe I have was that it wasn't shipped on time. I wanted it right away, so I specifically looked for a product with next day delivery. I didn't have a lot of time to waste. When it didn't arrive on time, I ended up going to Farm and Fleet about a half hour away to purchase the same brand. That was very annoying. The only thing available at the store was the concentrated form. It turned out to be much more economical. Next time, I will just skip the Amazon purchase and buy this locally.

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---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-03-19*