As soon as the seeds start to germinate, remove them from the heat. Set them on a sunny windowsill or under grow lights. Otherwise, they will get tall and spindly. Water seeded flats and seedlings from the bottom, or from the top with a spray bottle. You may have to move them or provide some shade for them, especially as the daytime temperatures get warmer.
All gardeners have successes and failures.
If your marigolds didn't sprout, plant some more. They may bloom a couple of weeks later, but you'll still have the satisfaction of having grown them yourself. This Garden Web Ring site owned by Nancian . All Rights Reserved.