drip line

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Jack Facts
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drip line

Post by Jack Facts » Wed Nov 14, 2012 9:34 pm

I recently heard a Bartlett certified arborist on radio (think it was your Sat morn show on WNAV) say that trees should be "fertilized near the trunk, not at the drip line."
Since this was contrary to my understanding, i checked with a pro i know who said research indicates fertilization should start half way between trunk and drip line,
then extend up to 1/3 that distance beyond the drip line (he cited research by Carpenter in CT and Thompson in NC). Not sure why the arborist said what he did -
perhaps came out wrong. Pls advise which version you espouse, and if he was on your show, and you agree with me, hope you'll find a way to correct the message
received by your audience. tnx

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Re: drip line

Post by lorijones » Tue Nov 20, 2012 1:30 pm

I didn't hear the show but Mark thinks they were discussing the application of one of the Bayer Advanced products like the 12 Month Tree & Shrub Protect & Feed. This product contains a systemic insecticide plus a slow release fertilizer. The label states to:
1. Measure distance around tree trunk or height of shrub or determine container size
2. Measure and pour required amount of product into bucket of water
3. Pour solution around tree or shrub base or in container
In general, though, you are correct that when fertilizing a tree, the fertilizer should be applied over the entire root system which extends well beyond the drip line.

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Re: drip line

Post by gybihos » Mon Dec 09, 2019 6:24 am

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