Now is the time we start thinking of starting the seeds of our vegetables and fruit that will need transplanting. So today I will be covering our germination chamber. It was made from some 1/4" plywood, bubble wrap, staples, wood screws and a small amount of lumber,(a couple of 1"x2" or a 1"x4" ripped in half, and a 1"x8" cut into 1 inch strips (or any 1" thick lumber that can be cut into material for slats)). Plus a few electrical pieces we will discuss later. You can see the construction details at http://picasaweb.google.ca/TVgrunt/2008SEEDSTARTING
Click on the photos for a larger photo.
Remember that these particular starting chambers were designed to accommodate the materials on hand, the size of the trays we were going to use, and the space that they had to fit into. You can use any dimensions that work for you, but plan them out before you start cutting the materials
First we built an open topped box out of the plywood and 4 pieces of the lumber cut to 1" x 1" x 18" long. Cut the sheet of plywood into 2' x4' pieces and then cut one of these pieces in half to make 2 - 2'x2' (end pieces.) The other 3 are the bottom and 2 sides. The lumber pieces are attached vertically to the end plywood piece with wood screws making sure that the bottoms of the end pieces and the plywood is flush. Attach the sides to the ends, by using wood screws to hold the long plywood pieces to the end pieces, again making sure that the bottoms of the 1"x1" and the plywood are flush. Measure the distance between the upright 1x1"s (on the ends it should be somewhere between 20" and 21" and on the sides the distance should be somewhere between 44" and 45"). You will need to cut 4 more pieces of 1"x1" for each of the lengths that you have measured. Insert one piece the right length between each of the upright 1"x1", flush with the bottom of you open rectangle. Screw these piece to the plywood. When joining I would suggest a screw every 6 inches a long the length.
Turn your open rectangle upside down, and attach the 3rd sheet of plywood to all 4 pieces of 1"x1" supports. This will give you an open box that is 2'x4'x2'high. Turn the box over so the open top is up. Now take the extra 1"x1" that you cut and attach them flush with the tops of the upright 1"x1". Done correctly you will have a lip that is about 4" from the top of your box. This will become the support for your slatted inserts.
Making the inserts. Measure the internal dimensions of your box. Set 4 strips aside for rails. Cut the rest of your 1" strips crosswise, to the length of the width of the interior of your box - 1/2" (this will allow you to lift the inserts out easily) . Take four pieces that you have set aside for rails and cut them to a length that is 1/2 the length of your inside measurement of your box minus 1/2" (again for ease of removal) and lay them parallel to each other, at a distance that the rest will reach across and end up flush with the outside edges of the rails. Attach each slat with a screw at each end. You will leave a slat's width between each slat to allow the heat to rise up into the upper chamber. Make sure that you embed the screws tightly. I would use 1 1/4" wood screws here.
Tomorrow, we will continue making our germination chamber.
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