I am using a self watering, seed sprounting trays from Gardeners supply. So far I planted marglobe tomato seeds and cherry tomato seeds. The other vegetable is national pickling cucumber seeds. The flower seeds that I planted is a large type yellow zinnias. This is the first year I am using organic potting soil. It has organic compost, peat moss and fine pine bark.
I really like this selfwatering system because I can be gone 3 weeks before it is completely dry. The clear plastic cover comes off as soon as the seeds have sprouted. There is a mat that wicks the water from the bottom tray to the top section where the dirt aand seeds are planted. I have been using this system for 15 years and it is quite efficient in growing all kinds of plants.
The seeds are usually sprounting in 6 days. Six days later they have their true leaves.