

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







| 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 |
H**N
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!
R**W
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.
R**I
Great
Worked perfectly
W**1
Lovely
It is easy to use, it saved my tomatoes plant from rotting. Easy to mix and use, has a great quality. It was intact and had no leakages. It helped my plants to bloom well. Highly recommended
F**A
Tomato saver
Saved my tomatoes from blossom end rot, fab stuff!
J**S
No comment.
Didn’t work for me.
F**S
This stuff works!
we had too much rain early this summer so i knew it would stop all of a sudden then my tomatoes would get blossom end rot so I ordered some, the rain stopped and I sprayed them and only had one bad tomato. I will use it every year. If you wait too late to use it you'll have a bunch of bad tomatoes I know because I have done it.
F**E
To early for results, hope it works
Fast shipping, product arrived as advertised. Followed instructions and used a pump sprayer. I hope this helps my tomatoes. To soon for results since I just applied yesterday. Tomatoes suffered bottom rot. Been a battle getting this tomatoes plants going here in Florida. Fighting leaf miners also
Trustpilot
2 days ago
4 days ago