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How to germinate Katsura?

Posted by seedmoney 8A (seedmoney@embarqmail.com) on
Thu, Dec 12, 13 at 18:16

Greetings,
I have collected some fresh Katsura (Cercidiphyllum japonicum) seeds from a 20 year-old tree planted as a memorial to a loved one. I have read on the Sheffield site that they germinate in 10 days at 70F. This has not been my experience. Help?Cercidiphyllum japonicum, Katsura Tree
Thank you,
seedmoney


Follow-Up Postings:

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RE: How to germinate Katsura?

seed

I germinated them at 70F in common potting soil, in a pot that was covered in a bag to maintain humidity. I probably sowed 30 seeds in the same pot and only one germinated (I don't remember how long it took). After germination it is essential that you maintain even moisture. I did that by keeping the pot covered with a plastic bag.

They are not good seeds to germinate. But the plant is worth it.


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RE: How to germinate Katsura?

I've always gotten very good germination rates ( >90%? ). I do it pretty much the same way. For me, these are some of the easiest seeds to germinate I've seen.


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RE: How to germinate Katsura?

Need stratification.

Lots of info if do search with
"germination of katsura tree seed site:edu" - but no quotes

Here is a link that might be useful: germination of katsura tree seed site:edu


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RE: How to germinate Katsura?

"Need stratification."

Mine haven't! And, almost all sources say no pretreatment (which would include stratification) is needed. Stratification won't hurt, but I doubt it going to make a huge amount of difference. If the seeds aren't germinating, it sounds like there may be some problem somewhere (bad seeds, improper moisture, or something).


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RE: How to germinate Katsura?

Apparently they sprout fine without stratification, but they seem to do okay with it also. I winter sowed 12 seeds in January that were collected at the Arnold Arboretum last fall. According to my records the first sprouted on April 5th. I got 2 seedlings last Spring, and they grew pretty quickly the first year - they are almost 2 feet tall. I'm not sure about this species hardiness but they're over-wintering in the garage with the rest of the babies and tender plants (Salvia B&B) anyway.

Here's a pic of the baby seedlings, May 11th -


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RE: How to germinate Katsura?

I collected a paper lunch sack full of Cercidiphyllum magnificum seeds. Then I made a couple of raised beds, and then sowed the seeds right away that Fall. Springtime came and the seed bed looked like I had sown grass. I eventually sold over a thousand of them. One order was for 600.
I haven't had to germinate any since because I get a few volunteers every year from the ones I have left.
Mike


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