I have found propergating vegetables from seed to a decent size before planting in to the garden to be touch and go especially out doors. This is why I built myself a hot house with a built in misters for irrigation and have found it to be much easier. hot house available @ Bob's Barn

here you can see that i have made up some seed trays out of hard wood

divided into three's and placed on work benches at waist height.

down the other end i have made a garden bed wich i have planted my prized rhubarb that loves the conditions that the hot house provides.

an over supply of my tomatoes have also been planted.

This bed contains high amounts of organic material and manure