It is not a difficult process to start flower seeds inside. You might wonder why anyone would go through the bother, when they can be planted right in the soil outdoors. In many locations there is not a long enough growing season to enjoy varieties of flowers that take longer to germinate, grow and bloom. By starting flower seeds indoors, four to six weeks before the last predicted annual frost, seedlings can be planted outdoors when that frost has passed.
Gather small containers. They can be clean, pre-used food containers (yogurt cups, cottage cheese containers, school lunch milk cartons with the tops cut off). Paper cups or commercial planting pots can also be used.
Fill the containers with potting soil up to 1/4 inch from the top. Commercial potting soil is excellent for seed starting as it is disease free and has no stray weed seeds in it.
Moisten the soil with a water bottle sprayer. Do not over water. The soil should be just moist.
Plant the flower seeds according to the depth recommended on the back side of the package. Larger seeds will be planted deeper than tiny seeds, but every flower is different. After poking the seed down into the soil, cover the hole with soil.
Place the containers onto a tray and place in a sunny window in a warm room.
Check the soil every day for moistness. The seeds must remain damp and warm in order to germinate (sprout comes out of the seed shell and through the top of the soil). Mist the soil when needed.
Continue to mist the soil, even after germination. However, once the seedling is established (firmly attached to the soil) you may, gently, add water to the soil, with a cup.
When the last frost has passed, in your location, plant the seedlings outdoors. Remove the seedling (with the soil) from the container. Dig a whole in your flower garden and place the seedling in it. Pat soil around it and on top, to secure it. Repeat the process with each seedling. Give the area a good watering, careful not to disturb the soil or damage the seedlings.