Nitrogen Fixing Species for Agroforestry Systems zone 8 9

I am looking for fabacea trees and shrubs  for north spain (zone 8-9 . 400m high, 900mm year rain, acid soil, few sunlight hours). I cant use acacia (invasive here). And i'd rather use it not only for nitrogen fixer but also timber, medicinal, dyer,  eatable ....

Do you happen to know a tree of this kind or similar?

Here is what Pfaf gave me, sorted by edibility rating:

LatinName	CommonName	Habit	Hardiness USDA	pH	EdibilityRating	MedicinalRating
Elaeagnus macrophylla		Shrub	6-9	ANB	5	2
Elaeagnus multiflora	Goumi, Cherry silverberry	Shrub	5-9	ANB	5	2
Elaeagnus multiflora ovata	Goumi	Shrub	5-9	ANB	5	2
Caragana brevispina		Shrub	5-9	ANB	4	1
Castanospermum australe	Moreton Bay Chestnut	Tree	8-12	AN	4	1
Elaeagnus glabra		Shrub	7-10	AN	4	2
Elaeagnus orientalis	Trebizond Date	Shrub	4-8	ANB	4	2
Aspalathus linearis	Rooibos	Shrub	8-11	AN	3	3
Ceanothus americanus	New Jersey Tea, Wild Snowball	Shrub	4-9	ANB	3	3
Ceratonia siliqua	Carob, St. john's bread	Tree	9-11	ANB	3	2
Comptonia peregrina asplenifolia	Sweet Fern	Shrub	4-8	A	3	3
Elaeagnus latifolia	Bastard Oleaster	Shrub	8-11	ANB	3	2
Elaeagnus pungens	Elaeagnus, Thorny olive, Thorny Elaeagnus, Oleaster, Silverberry, Silverthorn, Pungent Elaeagnus	Shrub	6-10	ANB	5	2
Elaeagnus x ebbingei	Elaeagnus	Shrub	5-9	ANB	5	2
Elaeagnus x reflexa		Shrub	6-9	ANB	3	2
Gleditsia japonica		Tree	5-9	ANB	3	1
Gleditsia sinensis	Locust	Tree	8-9	ANB	3	3
Gymnocladus dioica	Kentucky Coffee Tree	Tree	3-8	ANB	3	2
Hippophae tibetana	Tibetan Sea Buckthorn	Tree	7-10	ANB	4	3
Myrica californica	Californian Bayberry, California Wax Myrtle, California Barberry	Shrub	7-11	AN	3	1
Myrica cerifera	Wax Myrtle - Bayberry Wild Cinnamon, Southern Bayberry, Wax Myrtle, Southern Wax Myrtle	Shrub	7-11	AN	3	3
Myrica heterophylla	Bayberry	Shrub	5-9	ANB	3	2
Psoralea glandulosa	Culen	Shrub	8-11	ANB	3	1
Robinia pseudoacacia	Black Locust, Yellow Locust	Tree	4-9	ANB	3	2
Shepherdia argentea	Buffalo Berry, Silver Buffaloberry,	Shrub	3-9	ANB	3	1

thanks a lot andré!!!


(i though Castanospermum australe  did not tolerate the cold under 10ºC ... i liked it, is eatable, after treatment; and good wood  

You're welcome.

Lespedeza bicolor should do fine in that climate, and will inoculate other lespezedas in lower levels. I think caragana may be iffy that warm, but worth a try.

Dear folks of the fields,
I live in the U.S. and am trying to track down Elaeagnus macrophylla.  I can’t fimd any seller in the u.s. or that ship to the u.s.