Prilled Potassium Nitrate Fertilizer – 99% Pure, Highly Refined (5 lbs) – Multi-Purpose Plant & Lawn Care – Supports Root Growth, Tree Stump Removal & More – Industrial-Grade Strength

Came well packed, purity is great.

Not sure what else to say, its Potassium Nitrate. Possibly the best priced on amazon by the lb. You can find it other places cheaper online, but shipping usually equals it out... Unless you are buying like 50 lb.

This product works just like it did when my dad showed me how to dissolve a tree stump. Drill numerous, 6-inch vertical holes in the stump, wet the surface thoroughly, and sprinkle on the potassium nitrate liberally. Wet again to saturate the powder without washing it off the stump. Now wait. Depending on the type of tree stump, it can take weeks or months to get good results. At my place, the stump could be broken up easily with an axe or heavy hammer.

Great quality for the price. Works as intended.

Used in metalchemical process. Worked Great.

I have a passion for chemistry/propulsion & this stuff is great when making fuel for sugar rockets. Additionally, you can use this to deteriorate old stumps you have in your yard. Drill holes, pour in a little bit then let time take its course.

I learned that Potassium Nitrate is the best product to remove tree stumps, but it takes several weeks to work. At this moment in time I can't give a thumb up or down to the product itself. I'll be back with a follow up. Disappointing was the long time to be delivered It took almost two weeks to receive the order in spite of the fact that it came from USA, not overseas.

Making some homemade model rocket engines,and this is just one of the items that I needed....homemade is a lot cheaper than store bought...more flights for your money.