Summarize the following:
Dandelions grow wild and you can easily harvest their seeds when the plant is in the seed phase. This is when the top of the plant looks like a puffball. Each of the little feathery strands has a seed attached to it, so you can collect these in a bag or other small container and take them home for planting. If you prefer to purchase dandelion seeds, then check your local garden center or look for seeds online. Wild dandelion greens may have a bitter taste, while cultivated dandelion greens will not be as bitter. Dandelions do best when they have full sunlight for a large part of the day, so choose a sunny location in your garden or plan to place potted dandelions in a sunny window. Try going out in your yard a few times throughout the day to scope out the sunniest spot.  For example, you could go outside at 8 am, 12 pm, and 4 pm and note where the sun is at by placing a few rocks on the edges of where the sun is shining. If you will mainly be using dandelions for their leaves, then growing them in partial shade is a better option. This will help to reduce the bitterness of the leaves and the number of flowers it produces. The dandelion seed will need to be 6 inches (15 cm) apart for flowers and 2 to 3 inches (5.1 to 7.6 cm) apart for greens. Flowers will need more room than baby dandelion greens because they will have deeper roots. Measure the distance between your seeds to ensure that they will have plenty of room.  Leave the seeds uncovered if you are planting indoors. You will not need to worry about the seeds getting blown out. Dandelions do best in a shallow bed. Do not plant your dandelions in an area with poor drainage or a tightly packed soil, such as clay. Use a garden fork to loosen the soil before you plant if it is tightly packed. Use a loosely packed potting soil with added compost as the growing medium. Dandelions need a lot of water to thrive, so plan to water them regularly. However, do not water them too much. Water just enough so that the soil feels moist. Check the soil by poking your finger into it once every 2 to 3 days. If the soil feels moist, then they do not need water yet. If it feels dry, then give them some water.

Summary:
Gather or purchase some seeds. Choose a sunny location to grow your dandelions. Sow the seeds for flowers or greens. Water the dandelions regularly.