--- product_id: 6581975 title: "Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors | Garden Fertilizer, For Calcium Deficiency, Indoors & Outdoors" brand: "bonide" price: "R609" currency: ZAR in_stock: true category: "Bonide" url: https://www.desertcart.co.za/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid store_origin: ZA region: South Africa --- # Foliage spray application Calcium boost for tomatoes Instant water mixability Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors | Garden Fertilizer, For Calcium Deficiency, Indoors & Outdoors **Brand:** bonide **Price:** R609 **Availability:** ✅ In Stock ## Summary > 🍅 Stop rot before it starts—grow stronger, healthier veggies with every spray! ## Quick Answers - **What is this?** Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors | Garden Fertilizer, For Calcium Deficiency, Indoors & Outdoors by bonide - **How much does it cost?** R609 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid) ## 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 - • **Trusted Legacy:** From Bonide, a garden care leader since 1926, ensuring quality and reliability you can count on. - • **Calcium Powerhouse:** Targets and corrects blossom end rot by delivering essential calcium directly to your plants. - • **Rain & Growth Ready:** Perfect for use after heavy rain or rapid growth phases to prevent calcium deficiency stress. - • **Versatile Garden Hero:** Effective not just for tomatoes but also cucumbers, melons, and peppers—one solution for multiple crops. - • **Effortless Application:** Mixes instantly with water and sprays on foliage for quick absorption—no fuss, just results. ## Overview Bonide Rot-Stop Tomato Blossom End Rot is a 16 oz concentrated liquid fertilizer designed to correct calcium deficiency in tomatoes and other vegetables. It uses calcium chloride as its active ingredient, mixes instantly with water, and is applied as a foliar spray to prevent and control blossom end rot. Suitable for indoor and outdoor use, it supports healthy fruit development especially after heavy rain or rapid growth, making it a must-have for serious gardeners aiming for vibrant, rot-free harvests. ## 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. ## 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 | B000OOAL6U | | Best Sellers Rank | #490 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #25 in Garden Fertilizers | | Brand Name | Bonide | | Coverage | Medium | | Customer Reviews | 4.5 4.5 out of 5 stars (5,177) | | Global Trade Identification Number | 00037321001669 | | Included Components | Tomato Blossom End Rot Concentrate 16 oz. | | Item Form | Liquid | | Item Type Name | Bonide Rot-Stop® Tomato Blossom Set Spray Concentrate, 16 oz | | Item Weight | 1.3 Pounds | | Liquid Volume | 16 Fluid Ounces | | Manufacturer | Bonide | | Mixing Ratio | 2:128 | | Model Number | 166 | | Number of Items | 1 | | Part Number | 166 | | Specific Uses For Product | Stop Tomato Blossom End Rot | | Target Species | Pesticide | | UPC | 100076914536 617407747713 037321001669 | | Unit Count | 16.0 Fluid Ounces | | Warranty Description | Warranty | ## 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 ![Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors | 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 ## Frequently Bought Together - Bonide Rot-Stop Tomato Blossom End Rot, 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors - Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests, Polypropylene, Translucent White - Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid](https://www.desertcart.co.za/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-04*