Plant Database forum: Nitrogen Fixing plants

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Name: D Brawner
Daufuskie Island SC (Zone 8b)
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dbrawner
Aug 1, 2014 10:39 AM CST
I see where Symphytum officinale (comfrey) was listed as a nitrogen fixer. To my knowledge it doesn't have legume nodules. Does the NF classification extend to plants without nodules but still have excess nitrogen to give an perhaps other forms? If so I think honey locust ( Gleditsia triacanthos) might fall under that classification.
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
Garden Ideas: Master Level Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier
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dave
Aug 1, 2014 11:17 AM CST

Garden.org Admin

I think N fixing should be limited to those who use rhizzobia symbiotically to fix nitrogen.

I agree that comfrey is not a N fixer. This error was made by me - my book 'Gaia's Garden' shows comfrey as a nitrogen fixer and I checked it off in our database without thinking. I'll remove it from the comfreys. Thumbs up
Name: D Brawner
Daufuskie Island SC (Zone 8b)
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dbrawner
Aug 1, 2014 11:36 AM CST
I'll the change for Achillea millefolium.
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
Garden Ideas: Master Level Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier
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dave
Aug 1, 2014 11:55 AM CST

Garden.org Admin

Excellent. Thumbs up
Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Aug 1, 2014 4:11 PM CST
Azolla is a nitrogen fixer the that does so through a symbiotic relationship with a cyanobacterium (Anabaena azollae). Some Asian countries use it as a fertilizer in their rice. There have even been trails as a supplemental feed for livestock. Some trials have shown and increase in milk in dairy cows and eggs in chickens.

wildflowersoftexas.com
texasnatureonline.com


central Illinois
Charter ATP Member I was one of the first 300 contributors to the plant database! Hosted a Not-A-Raffle-Raffle Plant Database Moderator Garden Ideas: Level 2 Photo Contest Winner: 2014
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jmorth
Aug 1, 2014 6:05 PM CST
Soybeans?
Nothing that's been done can ever be changed.

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