We enclosed our previously screened-in carport, placing two small conventional windows on the SW side, facing our tiny sideyard. Both the SE side (facing our back garden) and NW side have sliding glass doors, the NW doors having glassed-in miniblinds. Both sliding doors have thermal drapes that can be used to cover them completely in weather that is too hot or too cold, and I have both a portable dehumidifier in the SW corner and and a large "end table" automatic quartz heater in the NW corner. I placed three large area carpets over the concrete slab, giving me essentially three different areas in which to arrange things. The slab absorbs both heat and cold, so if I am attentive to the room's needs it is entirely possible to keep it comfortable year round by adjusting the drapes, ventilating, and running the dehumidifier and heater. My sliding glass doors are screened, so on a good day I can open the doors at both ends and have a wonderful breeze through the entire room, and almost have the look and feel of a sun porch *and* a screened in porch, but without the inconveniences. The NE side opens into our tiny dining area, and we have an air conditioner in there. On very hot, humid days, our "sun room" is cooled sufficiently from that and a ceiling fan we added. This is a fairly low cost solution for anyone with a roofed-over carport or garage that they never park in; it's incredible the amount of living space that can be added to a home--it's now the largest room in the house, and the most attractive in terms of view, lighting, and general comfort.

Bon, Really, it isn't even time to put any warm-season edible plants in the ground yet except for corn in far southern OK, but I wanted to start some zinnias and basil and a few other warm-season things indoors. I don't even remember the OSU-recommended dates to start putting warm-season plants and seeds in the ground---probably April 10th for most things. Since I plant by the combination of soil temp, air temp and forecast, I don't remember the OSU dates as well as I should. I've got everything in the ground that I can plant at the present time except for a few flats of flowers I'm raising from seed, so I'll play around with starting a few herbs and flowers that I can put in the ground 4 to 6 weeks from now. Having had high temperatures this week in the mid- to upper-80s, I am worried we'll get too hot too early so went ahead and planted beans and corn this week. It is early for the beans, but we are unseasonably warm and so is our soil, so I think I'll get away with planting them early. It still is too cool for peppers, melons, okra, squash, cucumbers, southern peas and the like. Some years it gets so hot so early down here that plants that are heat-sensitive, like beans, start dropping their blossoms almost as soon as they start making blooms, so if there is anything I'll push in the ground a tiny bit early, it is bush beans. I don't rush pole beans or Lima beans quite as much as they don't seem to tolerate being planting a touch early as well as the bush beans do. Most of the veggie gardens we drive by on a routine basis on our way to town are either plowed or rototilled and bare, some with big puddles of water standing in them, so not many folks here have planted anything yet. A couple of them aren't even plowed or rototilled yet. I wouldn't have planted anything if I didn't have raised beds that dry out more quickly. I wouldn't dare put anything in the grade level soil yet because it likely would just rot. Even folks near us who usually get their onions in the ground here no later than the OSU recommended dates (and often much earlier) don't have onions in the ground yet. As far as Fred and I know, I'm the only person who's planted onions already, and it is getting terribly late in southern OK to plant short-day types. This may be the first year I've ever had my onions in the ground before everyone else. I just keep an eye on my soil temperatures, my air temperatures and our 8-10 day forecast when making planting decisions. I won't plant if the soil is too cold for whatever it is I want to plant because seeds won't germinate and transplants won't grow while the soil is too cold. Our soil has been shockingly warm this week in the raised beds, which made planting beans and corn possible. I need to tackle the weeds growing in the mulch in the grade level areas because those areas are too wet to work so they haven't been touched since autumn and are growing a healthy crop of cool-season weeds. It is warm enough that 4 o'clocks, daturas and the dreaded bind weed are sprouting. Ugh. I hate bind weed. Today is so windy and cold that I may not go out to the garden at all except to harvest asparagus. I might spend tomorrow catching up on the weeding in the grade level soil if it is dry enough. It it is too wet and big clumps of soil come up with the weeds, I'll just have to wait another day or two for it to dry out more. I will tackle the clean-up of the back garden next week. It is all grade-level soil with no raised beds, so has been too muddy for me to venture into it at all. The perennials back there are up and growing well, though, so apparently the constant moisture hasn't bothered them. So, what's a gardener to do when they can't garden? Starting seeds indoors is about all that's left to do on a day like this.

Thanks for the smart points about rain, klem. And I agree -- there are just so many options, and people are so opinionated about those options, that it's hard to know what to do. My biggest concern remains the weather and how that will affect things, but I know that's a local issue. Maybe I should walk around the neighborhood and survey some people with porches about the sun and the temp, etc. Without adding any new information, my wife and I are divided on what to do -- she thinks just screening it is fine, but I think it would be really nice to have glass for the late fall / winter. If we had to decide today, I think we would either do simple / cheap modern storm windows (which could be opened to the screen on the bottom half during the summer) or do something a bit more adventurous. What I'm thinking on the adventurous front is to screen it in, but do it in a way where there's space to add the old-style wooden storm windows later -- just simple single-pane units that slide into the windo frames and attach with this: http://www.houseofantiquehardware.com/screen-hooks-storm-sash-window-hanger?sc=12&category=91 . The main thing would be attaching the screen on the inside of the frames, or at least creating an outside sill deep enough for the storm windows to nestle within it and still be flush on the outside. Then we could remove the storm windows and store them in the garage during the summer (though that wouldn't help with rainstorms you mention). Does that make any sense? If we did that, we could see how we like the screen in the spring and summer, but add the glass later in an affordable and removable fashion. I haven't seen many people try this, but I think we could build the storm frames and get the glass cut by a local shop. Basically we would recreate something like this company's product: http://chicagogreenwindows.com/storm-window-primer/

You don't want just a space heater. When we bought our house 33 years ago, it had what had been a screened in porch that the owner had put in sliders and turned into a 4 season room. It had a small gas furnace; that got struck by lightning after we'd lived there a few years, and one that size was no longer made, plus the gas line was outside and had corroded and the gas company turned it off. It would have cost nearly $1000 to run a new gas line, even for this short distance. So, we tried the space heater/ceiling fan thing for many years. It was cold in the winter and hot in the summer so we rarely used this nice porch room. After my husband died, I decided I wanted to bring plants in from the terrace for the winter and I needed heat. I found electric baseboard heat, hardwired with a thermostat online and my SIL installed it for me. I quickly discovered that the AC for the first floor of the house (we have a zoned system) did an excellent job of cooling the porch as well, especially with the ceiling fan. I was lucky that there was already a screened porch there and the roof line was an extension of the roof of the house. That saved the previous owner a LOT of money. Last summer, I replaced the cracked plaster ceiling with painted beadboard and it looks terrific. I love this room and enjoy it with all its plants in the dead of winter. In MI, you may want to include a skylight on the roof to bring light into the sunroom and the house. I don't think this will be cheap, even with an existing slab for the foundation. If you do this, be sure to have a plumber install a faucet (like your outdoor ones) so you can easily water plants. We did this years later and what a great idea it has been. In England, one sees conservatories on the back of lots of houses, even modest ones. Unfortunately, in this country they are very pricey.