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Zone 9 Nitrogen-Fixing Water-Tolerant Tree or Shrub?

 
Posts: 137
Location: Galicia, Spain Zone 9
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So around my wetland I wanted to plant some water-tolerant trees. In my village, hazelnut and hawthorne grows along rivers.

So I am going to plant hazelnut and hawthorne a few meters uphill from the wetland and I want to accompany them with a nitrogen fixer.

I've looked through a lot of lists of nitrogen fixers but I wanted some suggestions from personal experience. Im planting in a location where I don't want anything too tall (so no grey alder here) so I need a nitrogen-fixing shrub or small tree whose roots would be within reaching distance of the soil of the wetland and who during heavy rainfall events may be temporarily waterlogged.

Any ideas?
 
pollinator
Posts: 1574
Location: northern California
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There are some shrubby alders, such as those native to eastern North America. Or you could plant whatever alder you can find and just plan to coppice it.
 
Jose Reymondez
Posts: 137
Location: Galicia, Spain Zone 9
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For some reason I remember reading grey alder coppices poorly, Ill recheck that and look in to the other alders.

Edit: Yeah there are some nice shrubby waterside loving alders, ordering seeds!
 
pollinator
Posts: 446
Location: Upstate SC
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Alnus serrulata (3m tall) and Gleditzia aquatica (up to 15m tall ) are native in swampy areas of northern Florida (zone 9).
 
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