I think if you are planting them outside, you might as well direct seed them -- in containers where they'll be grown or in the garden bed.
What are you planting? Cool-weather crops probably won't need any in your climate. If you want to goose tomatoes and peppers into growing faster, I would consider using top of cut-off plastic soda bottles and milk jugs with the caps removed for containers or individual plantings or floating row cover or plastic low/row tunnel for larger beds. There are commercial products sold for this purpose as well. I have a couple of clear plastic umbrella-like thingies (2'x4'), but bent wire coat hanger supports and and plastic sheeting would work.
I used this trick to start sunflowers and a small planting of corn extra early last year:
Another option is to "winter sow" in plastic tubs, etc. (There's a thread about it here in Seed Starting Forum). But I suspect weather is warm and ready for planting by now for you, at least. Here in NJ, we're having an unseasonably warm weather in the upper 60's yesterday and today, but we're going back down to 30's daytime high and 20's night time low after the weekend 50's.