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Mixed to standard recommendation and after 12 days, dandelions browned but still growing. I will reapply, but so far, I am not impressed compared to Ground clear (w/glyphosate).

Hello Andrew, thank you for your review and for giving Finalsan a try.

It is helpful to note how Finalsan operates compared to synthetic, systemic options like glyphosate (Ground Clear). Finalsan is an organic, contact-only herbicide made from ammoniated soap of fatty acids. It works by rapidly stripping the plant’s waxy cuticle to dehydrate the foliage. Because it is a contact spray and does not translocate to the roots, tough, deep-rooted perennials like mature dandelions may attempt to push new growth back up.

There are three rates of application. I would suggest using the highest rate and thoroughly coat the weeds to drip off. Finalsan is a weed and grass eater so something has to be off in the application rates, or amounts applied to the weeds. Finalsan is very effective.

Reapplying to starve the root system of energy is definitely the correct next step. We appreciate your patience as you transition to an organic approach, and our team is always here if you want to discuss application tips to get the most out of your spray!

The Rocky Mountain BioAg® Team

I spot spray dandelions with it and they are gone within a few days. I like there is no herbicide odor to it.

Hello Rob, thank you for the fantastic 5-star review!

We are thrilled to hear that Fiesta Turf Herbicide is making quick work of those dandelions and that you appreciate the clean, odor-free application. It is one of our favorite things about this selective iron-based formula, you get powerful spot-spray results without the harsh chemical smells of traditional herbicides.

We truly appreciate your business and support!

It works!!! I use 5 oz. to the gallon for dandelions, but 6-7 for other weeds that are more resistant such as Japanese clover and thistle. It drys quickly and is safe for our pets.

Hello Catherine, thank you for the wonderful 5-star review! It is great to hear that Fiesta Turf Herbicide is working so well for you and keeping your lawn pet-safe. We appreciate you sharing your specific dilution tips for handling tougher weeds like thistles and dandelions—that is incredibly helpful for the community. Thank you for your support and happy growing!

Great stuff

Hello Chris, thank you for the 5-star review! We are glad to hear you are having great results with Finalsan Weed Killer. We appreciate your business and support!

Been using for years.

Hello Donald, thank you for the fantastic 5-star review!

We truly appreciate hearing from our long-time customers. Finalsan Weed Killer is an excellent, fast-acting choice for reliable weed control, and we are so glad it has been performing consistently for you year after year. Thank you for your loyalty and support!

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Welcome to RMBA

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Let customers speak for us