How to make it Cut the top from a clear 2-liter soda bottle. Find a flowerpot that fits inside the dome. Fill the pot with potting soil, then plant the seeds according to the packet directions. Place the pot on a saucer and poke in a craft stick marker. Slip the dome over the pot. Be sure to water the soil when it looks dry.
Mini propagator - Cut a few holes in the lid for ventilation and check it often to make sure seedlings don’t succumb to the dreaded “dampening off”, a fungal infection that kills the seedling. You can either set all your little homemade containers in these or line the bottom with soil and plant directly.