Once seeds germinate and sprout, and leaves break surface, (few days to a week), uncover dome to sunlight or grow lights. Water seedlings as needed with distilled water or hydroponic/aquaponic nutrient water. If multiple seeds sprout, select out the dominant 1 or 2 seedlings that look the strongest and healthiest. Snip off the other weaker seedlings with sharp scissors at the base where it comes out of the plug. Periodically lift out plug to check roots. Once roots are coming out sides and bottom of plug, the entire plug and seedling can be transplanted into soil, or bigger pot, or hydroponic/aquaponic grow media.