User avatar
bryce d
Cool Member
Posts: 92
Joined: Fri Jul 05, 2013 5:00 am
Location: Northern Utah, zone 6b

How Much Nitrogen is Too Much Nitrogen?

Every year I pour more and more nitrogen into the garden. And to tell you the truth the garden does better every year. I put a lot of leaves and compost in every year. This year I put approx. 1 lbs. of nitrogen for every 100 square feet. That is what the bag say's to do. It was 46-0-0. I was wondering if I should put more in because of all the leaves and compost.
If I don't answer quickly I'm out in the garden picking morning glory.

User avatar
applestar
Mod
Posts: 28162
Joined: Thu May 01, 2008 11:21 pm
Location: Zone 6, NJ (3/M)4/E ~ 10/M

Re: how mutch nitrogen is to much nitrogen.

I don't know how to judge according to that scale, but I would think it will depend on what you are growing?

During winter, I like to look through my state ag extention's publications. I came across ones intended for commercial agriculture (warnings in strong languages that the publications are not for home/residential gardening). They were interesting in that there were detailed pounds per rate for macro and some minerals and micro nutrients. And the amounts were specified for EACH CROP.

OT: They were for conventional --not for organic-- cultivation and the amount and frequency of fungal/herbicidal/pesticidal fumigation before planting, during growth, and prior to harvest were pretty scary to me. :|

BTW -- chemical nitrogen doesn't stay in the soil -- it out gasses and gets washed away.... Organic matter and microbes help to keep it locked in the soil for the plants to use.
Learning never ends because we can share what we've learned. And in sharing our collective experiences, we gain deeper understanding of what we learned.

Bobberman
Super Green Thumb
Posts: 2437
Joined: Tue Nov 16, 2010 3:31 am
Location: Latrobe Pa.

Re: how mutch nitrogen is to much nitrogen.

What you are putting is urea the white pellets. Be careful because its very potent but cheap! I would use a 10-10-10 mix. Too much nitrogen will give you nice plants but no fruit! I also like Epsom salts that are not too expensive.

Do you use any lime especially for lettuce! Urea and Epson salts do help control slugs or snails! If you go to a farm barn you will notice very dark grass growing near the barn but you never see the cows eating it because of too much nitrogen from the manure near the barn. The grass becomes very bitter and too much nitrogen will effect lettuce in the same way and make it bitter !
I enjoy fishing ,gardening and a solar greenhouse! carpet installation repair and sales for over 45 years! I am the inventor of the Bobber With A Brain - Fishing Bobber!

User avatar
jal_ut
Super Green Thumb
Posts: 7480
Joined: Mon Jan 19, 2009 3:20 am
Location: Northern Utah Zone 5

Re: How Much Nitrogen is Too Much Nitrogen?

" I was wondering if I should put more in because of all the leaves and compost."

Hmmmm, that is a pretty good amount for that area. I would not use more. Sounds like your efforts are being rewarded with good growth. Have fun!
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-

User avatar
rainbowgardener
Super Green Thumb
Posts: 25303
Joined: Sun Feb 15, 2009 11:04 pm
Location: TN/GA 7b

Re: How Much Nitrogen is Too Much Nitrogen?

yeah, I think the leaves and compost are helping to balance out what would otherwise be too much nitrogen.

If it ain't broke don't fix it.
Twitter account I manage for local Sierra Club: https://twitter.com/CherokeeGroupSC Facebook page I manage for them: https://www.facebook.com/groups/65310596576/ Come and find me and lots of great information, inspiration

User avatar
Gary350
Super Green Thumb
Posts: 5365
Joined: Mon Mar 23, 2009 5:59 pm
Location: TN. 50 years of gardening experience.

Re: How Much Nitrogen is Too Much Nitrogen?

If you want the organic material in the soil to decompose you need nitrogen.

When planting season comes you do better with 20/10/10 if you still have leaves in the soil other wise use 15/15/15.

When the weather gets 85 degrees of hotter it is best not to use any nitrogen at all.

Return to “Vegetable Gardening Forum”