Flower seedlings are the beginning stages of the flower growing out of the ground. At this point the flowers are fairly delicate and could die easily from the wrong care. How you treat them will depend on where they are located, inside or out, as well as what the individual flower needs to survive. Since there are slight differences in what plants need, it is best to know the optimum conditions for the seedlings you are growing, so that you can prepare ahead of time.
Keep the flower seedlings in flats full of perlite, peat moss or potting soil until they are several inches tall. Make sure the flats have some holes in the bottom for drainage. If growing the seedlings in the ground outside, prepare the soil before planting the seeds by mixing in peat moss or potting soil. This will add nutrients and create better drainage.
Set flats in a well-lit, warm area or plant outside in a location that gets some sun. If the plants aren't going to be transplanted from their outside location to somewhere else, then plant them in the sun conditions they require such as full sun or partial shade.
Keep the soil damp but not soggy. Check daily to make sure that they don't dry out.
Cover small seedlings with clear plastic to create a greenhouse effect. This will keep them moist and warm.
Add small amounts of plant food mix to encourage growth. Follow the directions on the package based on the size of the plant and container.
Transplant seedlings to their permanent home once they get several inches high. Plant them either in individual pots or outside plant beds. Pots should use mostly topsoil, and outside locations should have a mix of topsoil with the original dirt.
Water transplanted seedlings so that the soil is damp. Keep watering daily unless rain gives you a day off.