Dear Sir,
Soil Crete while it may seem less labor intensive - due to a pouring method of entering materials to a form , has upon the do it yourself scale, the very real probability of being a great labor to manufacture, place and while is an over excessive expensive method for most needs. I would suggest traditional Rammed Earth with its 70% sand and 30% clay ( or 25% Clay & 5% Portland ( or 20% Clay 10% Lime ) ) for most home construction, including greenhouse construction, is a practical solution. When it is Stuccoed over with a proper foundation, lifted to a minimum of 6 inches over the water table level, it will last for several centuries.
I hope some of that helps you !
Joe Woodall, Eco-Architect , Managing Partner
Georgia Adobe Rammed Earth & Renewable Energy
231 Harris Lord Cemetery Road
Commerce, Georgia 30530 USA
706-363-6453
http://www.georgiaadobe.com sales@georgiaadobe.com