Monterey Liquid Copper Fungicide RTU - Organic Gardening Fungicide for Flowers, Fruits, & Vegetables - 32 oz

Monterey Liquid Copper Fungicide RTU is convenient, ready-to-use solution for gardeners looking to combat fungal diseases on fruits, vegetables, and ornamentals. Users appreciate its ease of application—no mixing required—and its effectiveness against common issues like powdery mildew, black spot, and blight. The spray nozzle provides good coverage, and the copper-based formula is generally considered safe for organic gardening when used as directed. Some users note the importance of following label instructions to avoid potential plant sensitivity. Overall, it’s a reliable choice for preventative and early treatment of fungal problems in home gardens.

I bought it to save my citrus trees but it has been raining too much to use it

The product was easy to use straight from the bottle — the spray nozzle worked well, and I liked that I didn’t need to mix anything.That said, I noticed only partial improvement after the first few applications. It definitely helped slow the spread, but didn’t completely eliminate the problem. I had to reapply more frequently than I expected, especially after watering or rain, which made it feel like a lot of upkeep.

Only one application, rid my peach tree if the red leaf curl fungus.

Works well.

Everytime my fig sprouts a new leaf, it goes brown and splotchy under the leaf. I spray this on it and within a day everything looks healthy and beautiful! Love this stuff! It single-handedly is saving my fig :)

Doesn't work AT ALL. Bonide copper powder killed the fungus on my hedges within days, but California banned it. This stuff doesn't work at all.

Helps my tree