msterspy wrote:

What should I get at my local hardware store / Home Depot to add
Nitrogen?

Use any off-brand generic lawn fertilizer that DOES NOT contain
weed killer. Or get a small bag of urea (sometimes rated 50-0-0)
and use very sparingly.

If you prefer something "organic" (although any chemist will tell
you urea is organic), use blood meal; but then stir immediately to
prevent it from attracting flies, dogs, or cats. Or you can use
guano (bat, chicken, or seabird). Manure is generally too weak in
nutrients to help.

--
David E. Ross
Climate: California Mediterranean
Sunset Zone: 21 -- interior Santa Monica Mountains with some ocean
influence (USDA 10a, very close to Sunset Zone 19)
Gardening pages at URL:http://www.rossde.com/garden/