Garden stores sell these flats, but experienced gardeners save them and probably will be happy to share. Some crops, such as lettuce, need light to germinate. That's why experienced gardeners often use a germination chamber or cover the pots with plastic or an insulating blanket. As soon as the seeds start to sprout, they'll need a cooler location. Let there be spring .
Few homes have a place that's naturally perfect for helping seedlings grow stocky and strong.
For best health, tiny plants need to think they're outdoors in spring. They need more light than most windows can provide. They need a change between daytime and nighttime temperatures. They also need water and nutrients. Most indoor gardeners have to create these conditions.