I would like to send a soil sample for testing of my lawn soil, but my husband just put down fertilizer. Can I still collect and send a soil sample? Or should we wait because applying fertilizer will effect test results? If waiting is necessary, when would it be okay to collect the sample?
Macomb County Michigan
If fertilizer was already put down it is best to wait to do a soil test. At this point I would wait until late October or into November to get a realistic measurement of what is available in the soil.