I know I'm a month too late but was unavoidably held up through the month of August....so finally got my low tunnels established and planted with winter crop greens.
Four 40 in. x 8 ft. frames with Agribon stapled to them, over metal hoops, landscaping fabric on the floor. Planted various romaines and some pak choi under there...I'd still like to plant some kale out in the garden also, just to see if it will grow, then feed it to the chickens.
I had planned to plant some carrots and still may try to do so, but will have to build a carrot box for it, as our soils won't allow carrots to grow....too much clay.
I've never done winter crops before and had wanted to do it right, planting at the first of August, but didn't get a chance to do that. I'm hoping they will germinate and grow well anyway before they go dormant for the winter.
When it gets really cold, I'll apply more hoops attached to the outside of the frame and apply a layer of plastic to the frames to add more warmth there. Bags of leaves at the ends of the rows will help block the wind there and prop sticks on the frames will allow me to regulate the heat there and access the beds.
I had applied chicken manure/compost tea to the beds, as well as Miracle Gro potting soil, under the landscaping fabric and am hoping that will provide enough nutrients for fall/winter growth.
All the romaines I planted are supposed to be winter hardy, as is the pak choi.