Sitsuma; 2nd place.

Ichangensis at Armstrong U.

Another pic or two of Thomasville at Bamboo Farm in Savannah.

My meiwa on FD is in ground and does very well. Got it from Ben Salley in Columbia, SC. You can find him on Facebook at simplycitrusnursery.

I bet we'll hear more about this at the Southeast Citrus Expo in Savannah this year.

Millet, Colorado usually gets cold and snow in October doesn't it? Being originally from FL, that amazes me. I'm sure your greenhouse can hold up a lot of snow! Can you post a pic of your greenhouse? I've imagined it being huge like one at an arboretum since you have in ground trees.  They have a huge in ground grapefruit in a big greenhouse at Daniel Stowe Botanical Garden in Belmont, NC.

Already 33 degrees F here with high winds, predicted to be 50-60 mph tonight. High of 54 degrees F. My stuff is covered. Supposed to get to 29 degrees in Asheville, and since it's snowing, I'll probably end up 5-10 degrees colder than there.

Snek, are your hardy citrus grafted, and on what? Trifoliata?

Millet, no. The plastic meets the ground. When it's warm outside I place blocks of wood or pots or whatever under the edges of plastic on the walls and open door to help vent tree. I've heard of some folks leaving an open gap at bottom of their enclosures and then packing straw or mulch at base to insulate more "on cold nights"; however, it gets extremely cold here and stays cold here for days, nights, weeks. A few years ago it hardly got above freezing for entire month of January. I have too many citrus outside to run around every other day moving piles of straw/mulch. I can open a door in morning before driving to work, and roll it down and tape it shut with strips of duct tape at night. Often it's already below freezing here before I get home from work around 5:30 PM in winter.

This is the Changsha frame covered in plastic with rolled up door.

I used to roll up both sides of the roof of my first frame house using 2x4 with edge of plastic sheeting stapled to it. Would weight the board down when roof in place with cinder block on roof. High winds here would actually lift the roof and dump the block onto the ground. I now staple the entire roof and sides down and leave one of four walls as an unstapled door that has 2x4 stapled to ground end of plastic that I roll up and hang on hooks to vent tree. Door side on east side since high winds usually from north west in winter. I need the wall door to access tree for fruit harvest in December and January.

LaCasaVerde, pvc snap clamps sound interesting. I'll have to look into that. We redid the roof last night with four 2x2s pitched into pyramid shape and spiked frame down with rebar. Sinking posts into ground when one can as you did there is the best option. How did you make your roof door out of plastic sheeting and attach to pipe frame? Snap clamps?

Thank you. I've already been doing this except with lengths of rebar stuck in ground to place the 10 ft pvc pipes on. Some of my trees are too tall now for 10 ft pipe and last year I even lengthened pipe to 15 ft lengths. It's difficult to cover and uncover 7 trees almost every other day in this method, often in the dark and sometimes in freezing rain/ snow storms. The framed-out greenhouse with one side to roll up/down and tape shut is much easier to manage once set up. The problem with my new structure is that it wasn't tied to the ground, yet. I went out today and got more rebar and hardware to attach it to frame after driving spikes into ground on all four sides. I can't sink the 4x4 vertical posts into ground because the two legs of it near house are sitting on the rock gravel French drain along side foundation of house. Planned on staking it down, just didn't know it would take flight in less than 24 hours after putting plastic on it. I'm putting a wood pyramid shaped roof on too with 2x2s; then won't have to worry about pvc possibly collapsing under snow again like it did one year in my high tunnel. No more high tunnel for me by the way. Those ichang and trifoliate hybrids down in the orchard are on their own this winter.