How long after fertilizing to wait for soil test

snkeyez95August 5, 2014

I found this forum a few months ago and have learned more that I could have imagined. Thanks!

I fertilized my new lawn (May 2014) about 3 weeks ago with lesco starter fertilizer.

I would like to get a soil test down now so I can strategize my plan of attack staring in the late summer early fall.

Can I take a soil sample now, or should I wait a certain amount of time after the application of fertilizer?


You are in USDA zone is: 5

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Most of the things i have read/seen - mention 3 weeks before a soil sample.

Personally i would wait a little longer - hate to bother getting a sample and then have it skewed by the starter fertilizer...

If it was something like straight urea or milo i don't think i would be as concerned. With the P and K element fairly strong in the starter - i would want that to have time to work its way into the system.

    Bookmark   August 5, 2014 at 3:28PM
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Pretty much what BoatDrinks said. Milo, urea, or a high nitrogen (low everything else) fertilizer is not an issue. Some labs don't test nitrogen. Any good soil review will ignore your nitrogen or specifically mention it doesn't matter a jot (it varies too much due to weather conditions, time of day, and so on).

For starter, 3 weeks with normal rainfall or irrigation is about the right time to wait.

You could go earlier, but when quoting your test make very, very sure to mention that. Several times. Underlined.

    Bookmark   August 6, 2014 at 2:15AM
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Thanks for the response everyone. I've watered twice about 3/4" each time and it has rained pretty hard a few times. I think I'm outside the 3 week window you've recommended.

    Bookmark   August 6, 2014 at 11:49AM
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