Hugelkultur/Raised bed greenhouse combo!

New to permies, love the work that's been applied into this site. I would like some thoughts/ideas on how to combined a Hudgelhulur raised bed & greenhouse in one. My idea is to construct a frame 5' wide, 5' deep and splitting the height from ground level to below ground surface & about 40' long. Using wire across two beds that will also be 2 1/2 apart, making a dome over the two and a roof system to allow sun into the frame and the ability to close up the sides when needed during the winter season, it's off and on cold to hot here in South Al.
Any thoughts would help. Thanks

Hi Daniel;  Welcome to Permies!

I have not heard of anyone putting a hugelkultur under a green house roof.   I see no reason it could not.  
I would not have thought that S. Alabama would get that cold.  
Owning a green house myself I can tell you that it can get very hot very fast.  We must use shade cloth to moderate temps and that effects how well things grow (tomato's in particular will not do well under shade cloth)  

Myself I would put that  hugelkultur out doors and plant things that can take a few chilly nights.  Then build a much smaller green house or even cold frames for you sensitive plants.

Thomas, thanks for the reply. Here in South Alabama we tend to drop to 17° like last year for a few day's then warm's up a week or so later to high 70° till the next cold front which includes a lot of rain before that. This year we've experienced a couple cold fronts that froze my pipes then rain, cold, rain ext.. My idea is to incorporate the Hugelkultur Raised beds to a full green house combination (given it's able to be opened fully for warmer days) for winter here being it fluctuates in temp ever year. And it allows me to grow my produce year round for sales ( hints bell pepoers, 🍅 and such double in price due to time of year). It also allows me to control how my plants are watered from over head or drip ( over head allows fungus, disease and other things to destroy my crop).  My idea allows continual application of organic material to be added as needed to further the plants health and growth to insure I'm getting the harvest I need to sell, can, bless others with or whatever I decide to do. My main goal is to supply year round produce that will aid in those who struggle ever day. God bless! Thanks