Growing Hostas From Seed

It's that time of year when the gardens are down for winter and it's time to think about the garden for next year. This year I am starting hostas from seed. During the fall, I collected the seed and will spend the long winter growing hosta seedlings.
If you collect hosta seed, make sure that the seed is mature. It normally takes 5 to 6 weeks for the seed pods to reach maturity before you remove them from the plant. Pods can be taken inside to continue to dry. Pods and seeds should dry in a paper bag to prevent mold. Do not use plastic for storage. Once the pods are dry they will split open or you may have to open them yourself. The seed should be black or dark brown with a slightly swollen end. The white seed will not germinate.
I start my seeds in potting soil that is sterile. The soil can be put into small flower pots or flats depending on how much seed you are starting. Make sure that your pots and flats are clean and have been washed with a 90% water and 10% bleach solution to kill any molds on the containers. Flats and pots should have good drainage. When I plant my seed, I fill the trays or pots with soil, sprinkle out the seed and then cover the seed with a thin layer of soil. I then lightly mist the seed with water and cover the pots with clear plastic domes or plastic bags. Hosta seeds will germinate at 60 to 70 degrees. Normal winter house temperatures of 60 to 70 degrees will work or you can use a propagation heat mat. Seeds germinate in one to three weeks. Hosta seeds do not need light during the germination period. Once you see sprouts growing, move the trays under florescent lights and continue to grow your hosta seedlings. Always watch your seedlings for "damping off".
When spring comes and the air temperature is above 50 degrees, you can plant your seedlings outdoors. Make sure that before moving the seedlings to their new garden site that you harden off the seedlings. Hardening off means to introduce your plants to outdoor conditions. Set the trays or pots outdoors for a few hours in a shaded area over several days. Gradually move the seedlings into morning sun and longer periods of sun each day over several more days. After being adjusted to outdoor lighting and temperatures your seedling will be ready to transplant to the garden.
Gardening Tip: Increase the amount of florescent light by using aluminum foil to reflect light back on to your seedlings. I use the folding reflective Mylar sun block shields for the front window of cars. They can fold down when not is use and can be stood up and positioned to reflect light where I want it.
Happy Gardening!
The Creative Gardener


Janet said…
Great idea with the Mylar windshield screen. I have never collected seeds from Hosta. Might have to do that one of these days!
I have never done hostas from seed. I have had great success with seeds tough, and have ordered many more for this coming season. I usually tend to clip the blooms, but this is an interesting idea....thanks!

texasdaisey said…
this makes me excited for when mine make seeds! I will definitely have to give starting hosta from seed a try.
How interesting! I never even thought about growing hosta from seed.
lynn'sgarden said…
A great how-to, Debbie! I've never tried propagating hostas before and you make it look easy! I grow only 2 varieties but would like to add more...just wished the deer didn't love them so much!
yes it is very amazing and wonderful post.Because it has something interesting. It is very surprising hostas done from seeds.