• Gardening Tips
  • Plant Propagation
  • Vegetable Gardening
  • Garden Projects

Friday, September 7, 2012

Growing Dogwoods (Cornus kousa) from Seed

A week ago we found ourselves at the doctors office for one of my children.  Nothing major (this time), just a regular check up and physical so she could run cross country (Very cool that a 7 year old wants to run cross country!).  After her appointment we left the doctor's office and found a dogwood tree, Cornus kousa, that was loaded with fruit.  To make a long story short (actually the rest of the story is below - otherwise there wouldn't be a post) we gathered a small bunch of berries(drupes) that had already fallen to the ground and brought them home to try and grow.

Cornus kousa


Cornus kousa is a dogwood that is native to Asia.  It's becoming more and more popular here in the U.S. due to its resistance to diseases like anthracnose which is brutal to our native dogwoods.  In fact a number of cultivars are now on the market which are a cross between the native dogwood (Cornus florida) and the Kousa dogwood including one called 'Appalachian Spring' which was introduced by the University of Tennessee.  If you compare the drupes of the two types of dogwood (native and Asian) you will notice some big differences.  Size is the most obvious with the Cornus kousa dogwood reaching about 3/4 of an inch in diameter where the C. florida dogwood drupes are about 1/4 to 1/2 inch.  (You can see a picture of the cleaned C. florida seeds here) Our native dogwood has drupes that are elongated where the Kousa is spherical.  The native dogwoods bloom earlier than the Kousa dogwoods by several weeks.  This gives the landscaper or gardener a nice option when planning spring flowering trees to ensure a succession of dogwood blooms.  Plan for the natives first, hybrids second, then the Kousa dogwoods for about 4-6 weeks of dogwood blooms.

Planting the Dogwood Seeds

When we got the drupes home I dropped them into a cup of water and let them soak.  I didn't keep track of how long I left them in the water but it wasn't more than a week.  Then I separated the seeds from the flesh of the fruit.  Here is where I was very disappointed.  Out of ten drupes only two had seeds.  That's the way it goes sometimes!  The two seeds were already beginning to put out roots so rather than stratifying them in a moist bag of sand in the fridge I planted them directly into a pot.  Dogwood seeds normally need a cold period to trigger germination so putting them in a cold refrigerator over the winter months is often a good idea.  Dogwood seeds are great candidates to try winter sowing too.

Assuming my two little dogwood seedlings spring up from the soil before cold weather hits I may have to bring them indoors to overwinter.  Otherwise I'll store the pot in the shed for some natural stratification!

2 comments :

  1. How very cool that your 7-year-old wants to run cross country! Our 7-year-old decided that he's going to be on the equestrian, swim, and soccer teams for the Olympics--which makes me laugh, because he was busy telling jokes on the soccer field Saturday, while he was playing goalie. Hmmm.

    I grow many plants from seed, but I haven't tried starting a dogwood. I think the kids and I will take a walk through the forest tomorrow to see what we find. (I love the Plant Propagation book on your site--I spent an hour today looking through my copy, trying to decide what I want to attempt next!) It's addicting!

    ReplyDelete
  2. Wow! that is indeed very cool tutorial. It really helps a lot. Thanks a lot for the share. I will surely try this. I wonder if my first seed will grow. Exciting! :)

    ReplyDelete

Thank you for reading The Home Garden. Please feel free to comment on the posts, ask questions, offer suggestions, or just say hi!

I read every comment The Home Garden receives and appreciate the time you take to read about what I'm working on!

Dave

Advertising will be removed from comments as the administrator of this blog sees fit. If you wish to advertise please fill out a this contact form with your proposal.