I am going to be working on building a season extender this summer also. It will be a high tunnel hybrid. We changed out the cheap sliding patio doors on the house for better ones and I made DH save the old ones for a greenhouse. He is going to build these into the ends of the high tunnel as doorways. We will have the bottom 3 feet of plastic permenantly attached with wire backing to keep out the pests and the sides will roll up from there for ventilation. There will be vent windows on the end walls also.
I have a little "growhouse" that DH built for me a couple of years ago that worked great and was our first attempt at a season extender. I was picking tomatoes off the vine until early November and had spinach survive all winter (it grew horizontally, about 1" tall) and then the next March it took off growing again and I had fresh spinach in early April. I will snag some photos after this next snow storm if you are interested in the growhouse construction. I am doing the Square Foot Gardening technique in there since it is such a small area. I was using soaker hoses to water, but they stopped working so I added drip irrigation and that seems to be working now.
It is simply a 4x4 frame around a 3.5' x 7.5' raised bed - 3' high in the front and 4' high in the back. We made 2x2 frames for doors that come completely out of the openings for working in the garden. I put welded wire on the frames, then wrapped them in greenhouse fabric. The original idea was to have two sets of doors - one with plastic, one with just the welded wire to keep out critters. But the Wyoming winds are such a problem for growing anything greater than 2" high, that the plastic doors never came off. The top is a permenant plastic roof - once again, the original intent was to be able to remove the roof panels and just have it open. We are dry enough here (15" moisture per year) that having the plastic seems to help keep in the moisture. The sides have the angled roof line areas that are completely open for air flow so it doesn't get too hot in there. Last summer was so hot and dry that the lettuce bolted right away, but I got 3 months of harvests from the sugar snap peas.
I tried heirloom tomatoes and got a really bad infestation of aphids - not sure how I will manage those this summer - definately not putting tomatoes back in there again. But, I did get 1/2 bushel of tomatoes from 6 plants. Right now I have a single garlic plant that survived (I found some year lold cloves that I failed to plant last spring and planted in Nov.) and two onions that I somehow missed picking last fall.
I have a little "growhouse" that DH built for me a couple of years ago that worked great and was our first attempt at a season extender. I was picking tomatoes off the vine until early November and had spinach survive all winter (it grew horizontally, about 1" tall) and then the next March it took off growing again and I had fresh spinach in early April. I will snag some photos after this next snow storm if you are interested in the growhouse construction. I am doing the Square Foot Gardening technique in there since it is such a small area. I was using soaker hoses to water, but they stopped working so I added drip irrigation and that seems to be working now.
It is simply a 4x4 frame around a 3.5' x 7.5' raised bed - 3' high in the front and 4' high in the back. We made 2x2 frames for doors that come completely out of the openings for working in the garden. I put welded wire on the frames, then wrapped them in greenhouse fabric. The original idea was to have two sets of doors - one with plastic, one with just the welded wire to keep out critters. But the Wyoming winds are such a problem for growing anything greater than 2" high, that the plastic doors never came off. The top is a permenant plastic roof - once again, the original intent was to be able to remove the roof panels and just have it open. We are dry enough here (15" moisture per year) that having the plastic seems to help keep in the moisture. The sides have the angled roof line areas that are completely open for air flow so it doesn't get too hot in there. Last summer was so hot and dry that the lettuce bolted right away, but I got 3 months of harvests from the sugar snap peas.
I tried heirloom tomatoes and got a really bad infestation of aphids - not sure how I will manage those this summer - definately not putting tomatoes back in there again. But, I did get 1/2 bushel of tomatoes from 6 plants. Right now I have a single garlic plant that survived (I found some year lold cloves that I failed to plant last spring and planted in Nov.) and two onions that I somehow missed picking last fall.