--- 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: "€ 36.50" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.gr/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid store_origin: GR region: Greece --- # fast calcium absorption foliar spray application 16 fl oz concentrated liquid 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:** € 36.50 **Availability:** ✅ In Stock ## Summary > 🌱 Stop rot before it starts—grow flawless fruit with Bonide Rot-Stop! ## 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?** € 36.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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 - • **Calcium Power Boost:** Instantly corrects calcium deficiency to stop blossom end rot in tomatoes and more. - • **Trusted Legacy Formula:** Bonide’s proven garden care expertise since 1926 ensures reliable results. - • **Foliage-First Nutrition:** Foliar fertilization delivers calcium directly to leaves and developing fruit for rapid uptake. - • **Versatile Garden Savior:** Effective on cucumbers, melons, peppers—one solution for multiple crops. - • **Effortless Spray-On Application:** Mixes easily with water for quick hose-end or tank sprayer use. ## 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 uses calcium chloride for fast foliar absorption and is easy to apply via spray. Trusted since 1926, this product supports healthier, rot-free crops indoors and outdoors. ## 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 | |---------------|-------| | Application Method | Spray | | Asin | B000OOAL6U | | Best Sellers Rank | #1,261 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #56 in Garden Fertilizers | | Brand Name | Bonide | | Coverage | Medium | | Customer Reviews | 4.5 4.5 out of 5 stars (5,210) 4.5 out of 5 stars | | 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 | | Number Of Packs | 1 | | Part Number | 166 | | Specific Uses For Product | Stop Tomato Blossom End Rot | | Target Species | Pesticide | | Unit Count | 16 Fluid Ounces | | Upc | 100076914536 617407747713 037321001669 | | 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Must have for your garden *by on Reviewed in the United States July 25, 2026* his concentrated liquid fertilizer is a total must-have for anyone struggling to keep their tomatoes healthy and thriving. I noticed my tomato plants were struggling and the leaves were curling up, which can be a classic sign of stress and nutrient issues. After using this calcium deficiency treatment, it completely turned things around. It corrects the problem quickly, stops blossom end rot right in its tracks, and ensures the new fruit grows perfectly healthy and beautiful. It is incredibly easy to mix for both indoor and outdoor use, and it gives you complete peace of mind during those brutal mid-summer heatwaves when plants are most vulnerable. If you want a bountiful, rot-free harvest, do not wait until you see damaged fruit to get this bottle. ### ⭐⭐⭐⭐⭐ Very effective *by on Reviewed in the United States August 12, 2026* Solved my bottom rot problem. Used it once a week disbursed over the foliage. Took care of the problem with the tomatoes. ### ⭐⭐⭐⭐ Helps with Blossom End Rot. *by on Reviewed in the United States July 9, 2026* I believe it’s about time that the sellers of such products show on the label how much to use per liter as well as per gallons , Bonide only shows two Oz per gallon except the wonderful unit I have just shows liters making for guess work. Is it that hard to give good information to the consumer. Bonide is a big company and probably sell their products to other countries many use liters. I have used the product and the price is reasonable ## 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.gr/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid](https://www.desertcart.gr/products/6581975-rot-stop-tomato-blossom-end-rot-16-oz-concentrated-liquid) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-08-23*