Late last spring I did an experiment with some tomato seeds and my own version of a greenhouse. It was a successful experiment, so I decided to try it earlier this year with tomato seeds and some of the nasturtium seeds I received from Renee's Garden as part of the Seed Grow Project.
First I have to make my "greenhouses". I take water bottles and cut the spout end of with a hacksaw or scissors (depending on thickness of plastic). I then take either a nail or a drill and put holes in the bottom of the bottle that will allow air and water in. Ta Da, you have a miniature greenhouse.
Then it's time to pick a sunny location and work the soil, plant the seeds, and water them well.Then place the "greenhouse" over the top of the area where you planted the seeds. Water as needed, and then remove the "greenhouse" cover and harden off plants when there is no longer a danger of frost.