Personally we would say no.Evergreens especially fresh cut ones are not going to break down in the same type of time frame that a nice cotton wood will.They also have different types of compounds in them that can work more in the lines of a preservative.Old half rotted evergreens may be a bit different story since if your out in the woods...It has been our experience that using evergreens in garden piles tends to also use so much of the nitrogen one ends up babysitting plants the entire seasons..
That all said neither of us are hugelkulture specialists.Even though we have planted in piles similar for years ..Most have been composed of partially rotted evergreens.Perhaps some one who has more experience with it as it is named and written about here has more information.The years we used it we were utilizing space and it was just another usable growing area,,Before we came to permies and read there is a name for buried slash piles as we knew them..LOL, Guess that means it is all your choice, If it were me I would research out more until I was comfortable with the wood choice..
Put the moon back where you found it! We need it for tides and poetry and stuff. Like this tiny ad:
permaculture bootcamp - learn permaculture through a little hard work