LaMotte - N-P-K Soil Test Kit

I am no chemist but these are too easy to use and lets me make educated decisions on the soil readings

It's easy to use and it comes with a lot of testing materials but the chart has just L M H to determine what the levels are. It also shows what the different colors of the water can be but I was hoping for something a little bit more accurate, I guess for the money it's pretty good. If I were to do it again, I would spend more money to get a better, more accurate test.

I use this kit every year with my AP environmental science students. It is easy to use and follow directions. My only complaint is that it doesn't come with testing vials/ test tubs for an entire class...I keep saving them year after year and will eventually have enough!

Used for a lab class on soil testing. It's very easy to use, and the instructions are written well. It would be great to have more accuracy than low/med/high, but from a demonstration perspective this is fine. Enough sample packets for many students, but you will need to provide additional test tubes as there are only 3 in the kit.

I used this product to test the N-P-K levels in my garden. Plants were turning yellow and dying. This kit consistently showed low chemical levels, so I added and kept adding synthetic and organic fertilizer. The readings remained the same: low levels of nitrogen, phosphorus, and potassium. This did not make sense, so I did my own control test using nitrate fertilizer as my sample. The results said low levels of nitrogen. I talked with the R & D guy at the company. He offered no explanation, other than the chemicals in the test kit may have been expired. They weren't; the label said they were good until Feb, 2021. I finally took samples of my garden soil to a local lab. The nutrient levels in those samples were actually 5 times the normal amount of N-P-K you would expect in a rich soil. This kit was 100% wrong and mislead me into adding more fertilizer to my already saturated soil. Don't waste your money. The information you get from the kit will be unreliable, and invalid.