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Author Topic: Adonis seeds - seedlings  (Read 522 times)

Gabriela

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Adonis seeds - seedlings
« on: June 09, 2019, 02:02:03 PM »
I think this may be a good time to open a thread on growing Adonis species from seeds. Probably everyone knows that from dry seeds the success of germination is close to zero (I've tried A. vernalis twice).
Interesting that sometimes even from fresh seeds it poses problems, which I suspect is due to entering a second dormancy (like many other Ranunculaceae).

Last year in June I was lucky to receive fresh seeds of Adonis amurensis from Leena  :-* They were sown and kept in a shaded place in the garden. The summer was very dry (of course I watered) and last winter, normal I would say, in any case not much colder than in Finland.

In the spring my seeds germinated; Leena also sowed a pot and hers didn't: same seeds, about same date of sowing, almost the same conditions.
For a while I wondered if maybe I have some other seeds in the pot....
Anyway, this is how they look now, in the cotyledon leaves stage since early spring. I welcome others to contribute with theirs experience in growing Adonis from seeds.

Adonis amurensis
Gabriela
Ontario, zone 5
http://botanicallyinclined.org/

ashley

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Re: Adonis seeds - seedlings
« Reply #1 on: June 09, 2019, 08:55:03 PM »
That's a great result Gabriela.  I wonder what the key trigger was?
Ashley Allshire, Cork, Ireland

Gabriela

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Re: Adonis seeds - seedlings
« Reply #2 on: June 10, 2019, 12:23:59 AM »
That's a great result Gabriela.  I wonder what the key trigger was?

Me and Leena kept comparing the conditions Ashley and couldn't figure out what is it.
The pot was in a group with other summer sowings (Corydalis, Sanguinaria. Hepatica...) in a small frame which I found embedded in ice in the spring, literally. I had to use a sort of 'ice breaker' to release them one by one because they needed to be moved to another place with more light.

In the process I destroyed some of course but the contents were easy to transfer in others - they were ice blocks. I don't know if I explain it well.
Could this be the reason?
Gabriela
Ontario, zone 5
http://botanicallyinclined.org/

Leena

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Re: Adonis seeds - seedlings
« Reply #3 on: June 10, 2019, 06:10:26 AM »
Gabriela, thank you for the picture. There was no picture of Adonis seedlings in the internet that I could find either.
I have one lonely seedling looking just like that in a pot of Adonis seeds from summer 2017! I am so glad to see that the seeds were fine, and fertile, and it was only me, so now there is hope that also I get seedlings one year. :)

I think my mistake with the seeds was that I kept the pot in the greenhouse (under table in shade), where it got too hot for the seeds in the summer. The reason why I did, was that there the pot was under my eyes and I could keep it watered. Outside if I forgot it, it may have dried out (that has happened with other seeds). I had also some Hepatica seed pots in the greenhouse, with no germination (or one seedling), and I suspect all the seeds had gone into dormancy when it was too hot. I hope they will germinate next spring. Also my pots were in the root cellar for the winter, where the temperature was around +1-2C, just above freezing, and outside under snow it would have been colder. Now that I think, I have found that Ranunculaceae-family (like Aconitums) seeds many times germinate better if kept outside colder. These were so special seeds that I wanted to give them more protection and it may have been a mistake.
Now, this years seeds are sown in pots which are outside in shade and covered with plastic to keep them moist (I can't rely in water coming from sky, and I may also forget to check them often enough), and I will keep my fingers crossed.
Leena from south of Finland

Leena

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Re: Adonis seeds - seedlings
« Reply #4 on: June 10, 2019, 06:17:31 AM »
I just remembered: strangely Galanthus seeds from my own plants germinated fine in the same conditions I described, and they were just next to my Adonis pot. I don't know...
Leena from south of Finland

ashley

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Re: Adonis seeds - seedlings
« Reply #5 on: June 10, 2019, 12:53:29 PM »
... in the greenhouse (under table in shade), where it got too hot for the seeds in the summer.

That makes sense Leena, that adonis are susceptible to summer heat whereas your galanthus were not.
Ashley Allshire, Cork, Ireland

Gabriela

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Re: Adonis seeds - seedlings
« Reply #6 on: June 10, 2019, 10:06:09 PM »
I don't really think the summer heat in the greenhouse was the real problem Leena, and maybe not even the lack of very cold temp.
For those who never visited southern Ontario it may be hard to believe how hot it gets in the summer here, even in the shade.

Adonis seeds (just like those of Hepatica and other Ranun.) have an underdeveloped embryo at the time of collecting. Nothing much happens in the summer anyway, they start growing in late summer to early fall when the temp. start to cool down a bit. All this has been documented.

So, summer heat should be fine as long as they get lower temp. in the fall. And I supposed you don't heat the greenhouse Leena?
What I would like to understand mostly is the secondary dormancy process. Why the ones from 2017 didn't germinate better assuming that they got a second chance for the embryos growth?
Gabriela
Ontario, zone 5
http://botanicallyinclined.org/

Leena

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Re: Adonis seeds - seedlings
« Reply #7 on: June 12, 2019, 02:27:50 PM »
And I supposed you don't heat the greenhouse Leena?

No, there was not extra heat.
This is strange, because a friend of mine here sowed also his Adonis seeds fresh in the summer, kept the pot outside all summer well watered and also outside all winter under snow, and his seeds germinated this spring. So clearly there was something I did wrong.
Anyway, now I keep the pot outside until next spring and we'll see what happens then.
It would be good to understand better what happens and why.
Leena from south of Finland

 

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