Fall Nitrogen for Trees

[g-man]

I searched the site and google but I couldn't find good info around nitrogen for trees.

Some of the info I found called for 3lb of N / 1000 sqft once dormant, but it gave no clear way to determine the 1000 sqft.

This site from This Old House calls for 1-3lb of N / 1000 sqft of bed. But they also recommend 13-25-12 in November into the lawn to help the roots, so I'm not thinking their recommendations are good. https://www.thisoldhouse.com/ideas/esse ... ertilizing

This pdf from the university of wisconsin has a decent info, but it fails at the total qty of nitrogen to apply. It calls for 2lb of fertilizer per 100 sqft of root zone, but it recommends a 12, a 16 and a 20 % nitrogen fertilizer. http://counties.uwex.edu/douglas/files/ ... zation.pdf

This one from purdue calls to apply a 5-10-10 but not rate. https://www.extension.purdue.edu/extmed ... -484-w.pdf

Any guidance? I've dropped some Milo around the trees in labor day. The trees are young.

[Zareth]

I've used osmocote in the past.
Important to spread it out, if its a small tree go to the drip line, if its a small tree do half the drip line.

I don't know if the rates matter too much, most trees are low responders to fertilizer although my chinese elm responds to urea pretty well! I put a handful around base of the trunk when its already growing quickly but never if it seems like its not putting on new leaves. It can get enough nutrients from the ground already, so I let it determine its growth and then just give a little boost here and there.