There is a very easy, no-fuss method for even beginning hosta fanciers to germinate seeds. You don’t need fancy equipment, because repurposed household materials will work just fine. Germinating hosta seeds is an inexpensive project to share with your kids, who will love watching seedlings sown in December emerge and develop into plants ready for the garden in May or June.
Sterilize your tools for starting your hosta seeds by washing them in a 10-percent liquid household bleach solution. Slightly moisten your seed-starting medium and bake it in a 200-degree Fahrenheit oven for an hour, or microwave it on high for 10 minutes.
Cut the top from a Styrofoam egg carton to create a seed-starting mini-greenhouse flat. Poke several holes in the bottom of each cell for drainage. Reserve the lid to serve as a drip tray to set the seed-starting flat in.
Fill each cell of the egg carton about three-quarters full with seed-starting medium. Press lightly to even the surface, and moisten it slightly with a spritz of water from a plastic spray bottle.
Scatter several hosta seeds over the top of the medium, and sprinkle on enough medium to just cover them.
Set the flat in a shallow container of warm water until the surface of the planting medium is evenly moist. Remove it from the water, and allow it to drain for a few minutes.
Set the seed flat into the drip tray, and seal everything in a clear plastic bag. Place it in a warm spot out of strong light, since hosta seeds don’t need light to germinate. The top of your refrigerator or above a hot-water heater are ideal locations for this.
Inspect the tray daily for signs of germination. As soon as seedlings pop through the medium, in about 10 to 14 days, remove the plastic bag. They’re ready to place under lighting to continue developing.