Best greenhouse

I don't know about the low wall,but I did a lot of research before I bought my 8 x10ft. Mine's a rhino from
http://www.greenhousesdirect.co.uk. Don't know if they do 10ft wide but I think they did. Quite a few of the tv gardener's have them. I was very satisfied with the service on ordering & subsequent delivery & haven't had any trouble with it. It's supposed to be very stronger & a lot taller than lots of others,came with more opening lights than most too.

I have an Elite Thyme Dwarf Wall 8 x 6 greenhouse which I had installed this time last year, I absolutely love it.  Try as I might I still haven't figured how to post pictures on here but I will take a photo in the morning a see will my daughter show me how to post it.

Make sure you use at least medium density concrete blocks rather than anything aerated or lightweight which will not be water or weatherproof.

My greenhouse stands on a base constructed from concrete bricks rather than blocks because I didn't need that much additional height (plus the concreted area I was building it on wasn't level so a certain amount of creative bricklaying was required!  )

I have some medium density blocks which have been used for a variety of temporary applications, and they are still in good condition after about 5 years of being exposed to all the elements outdoors without any sort of protection, although you can of course paint them to both seal them and make them look a bit more appealing.

Thanks for the advice! The builder who's going to put up the wall said he would use high density blocks as he already uses these for conservatory foundations. Good to know he knows his stuff  I didn't know you could paint the blocks to help with preservation, so will certainly do this. There are several reasons for the wall: height (plan to grow a peach tree at one end); to absorb heat/reduce fluctuation (esp dips at night); to allow me to build raised beds on the inside; and to protect lower panes from accidental damage.