Weed killer

Question

Is there any way we can test our plans for weed killer damage apart from waiting to see if they die? We think they have been vandalized. Also, is there anything we can do to lessen the effects? It may have been done a few days ago while we were on holiday. Thanks.

Answer 1

You could have a soil test preformed but the tests can be expensive to have done.
Here are some articles that have more information.

http://extensionpublications.unl.edu/assets/pdf/g1891.pdf
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-long-does-weed-killer-last-in-the-soil.htm