Hi.  Will your green house have heat and water available? That makes a great difference in regards to what and when to plant.

Thanks,

Water yew, and I plan to add a few gallons (3 or 4)of water in bottles at the bottom.
This is a small space of about 2 x 3 x 4'

Thanks!

That should read YES, typos are me, ha ha.

No need to worry about the typos. I make more than plenty myself. The question will be how many degrees of warmth the water can steadily provide, which I need to do some additional research to determine. I think that is a wonderful idea, but if we have an extended cold snap, like we did last November, your seedlings will get some cold damage.

In general, you start all seedlings about 4-6 weeks before you want to plant them, and your greenhouse will provide a nice safe way to get your seedlings started. Our biggest concerns for greenhouses are getting too hot in the summer, and too cold in the winter. The seedlings you start for you fall and winter gardens will be the biggest concerns because they will cook in a greenhouse if they are kept in without cooling. The water bottles will help with this to some degree as they absorb the heat, but you will still need to keep an eye on the temps in there.

For your summer garden, you will be starting those seedlings about 4-6 weeks before you plant to plant. Those water bottles will come in handy if we have a late freeze during this time. Plant to put a thermometer inside your greenhouse for close observation.

Your local Extension agent will have a listing of your local freeze/plant dates and what varieties grow best for you up there. His name is Chuck Jones and his contact info is below. Also see our information on the Aggie Horticulture webpage at http://aggie-horticulture.tamu.edu/vegetable/  and our home vegetable guide athttp://aggie-horticulture.tamu.edu/organic/files/2011/03/E-502_home_vegetable_guide.pdf which is very comprehensive.

Happy Gardening!

Agriculture & Natural Resources Agent

Chuck Jones

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Here is a pic of the structure. We have an L shaped corner with a brick wall facing south which is nice and sheltered in winter. Dimensions: 16"W x 30"D x 43"H
See the attached photo

I am wondering if it is possible to grow things like lettuce and other cool season crops up to and ready for consumption. Also maybe herbs and strawberries?
I can always take the whole thing into the garage during nasty cold snaps or add a lamp or something. Your idea of a thermometer is something I hadn't thought of so will do.
Toying with the idea of adding some casters to the bottom for ease in moving. As you can see there in no shelf close to the ground.
Thanks so much for your help.

Absolutely, you can grow can grow the lettuces and herbs even with no problems on the top shelf because you should get plenty of sunlight. For the other shelves, you would need to get a grow light in order to grow things to fruition, but for seedling creation, there would be no problem.

Yes, I would definitely add casters, and that is a lovely greenhouse!