Seeds forum: Begonia grandis?

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Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Jan 2, 2015 9:18 AM CST

Moderator

Do any of you grow begonia grandis? Are there any special germination requirements like cold strat? Does it reseed invasively for you?

Karen
Name: Julia
Washington State (Zone 7a)
Garden Photography Region: Pacific Northwest Celebrating Gardening: 2015 Forum moderator Plant Database Moderator I was one of the first 300 contributors to the plant database!
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springcolor
Jan 2, 2015 11:08 AM CST

I have this one but bought as a plant. It does expand out around the base but has not been crazy. This has been planted out for about 2 years, tends to bloom late in the summer.
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Name: Lin
Florida (Zone 9b)
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plantladylin
Jan 2, 2015 11:18 AM CST
I found this page which says the seeds should be propagated at room temperature: http://www.robsplants.com/plants/BegonGrand and read that seed should be sown when fresh.

This page says seeds can be very slow to germinate: http://www.pfaf.org/user/Plant.aspx?LatinName=Begonia+grandi...

It sure is a pretty Begonia! I've never heard of a begonia becoming invasive so I will be interested to hear what others have to say on that matter.
~ Eat, Sleep .... Play in the dirt ~
Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
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kqcrna
Jan 2, 2015 12:28 PM CST

Moderator

Yes, I saw that stuff at Rob's plants. Wondered if anyone here had experience with it.

I might order some seeds for this . Was hoping to find pelleted but no luck. Summerhill sells them as raw seeds. I'm really not good with those tiny dust-like seeds.

Karen
Name: Julia
Washington State (Zone 7a)
Garden Photography Region: Pacific Northwest Celebrating Gardening: 2015 Forum moderator Plant Database Moderator I was one of the first 300 contributors to the plant database!
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springcolor
Jan 2, 2015 12:30 PM CST
I agree Not much luck with the dust-like seeds. If you do grow keep us posted!
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Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Jan 2, 2015 12:38 PM CST

Moderator

I will.

Karen
Name: Jonna
Belgium, Europe (Zone 6a)
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JonnaSudenius
Jan 2, 2015 1:00 PM CST
I winter sowed the seeds. Had just a few germinated . Lost the seedlings due to neglection.
Also got a few plants in a swap. They are a bit disappointing. They bloom late here and there are more leaves than flowers. The branches easily break if you touch them or with strong winds we often have here
Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Jan 2, 2015 2:12 PM CST

Moderator

Hmmm.... that doesn't sound promising. Thanks for the input, Jonna.

Karen
Name: Jonna
Belgium, Europe (Zone 6a)
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JonnaSudenius
Jan 2, 2015 2:59 PM CST
Karen, others might have other experiences, but for me it was one of the most disappointing plants I grew.

Try the vermiculite to sow dust like seeds. Just sprinkle them on top. See http://www.seedsite.eu/articles/sowing for more info. Although the Begonia seeds were not a great succes, I still had some germination. Vermiculite is perfect to sow dust like seed.
Name: Julia
Washington State (Zone 7a)
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springcolor
Jan 2, 2015 3:11 PM CST
I don't have issues with wind breakage but I I agree that it is not that showy of a plant like a Dragonwing begonia.
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Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
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kqcrna
Jan 3, 2015 6:38 AM CST

Moderator

Jonna, I tried your vermiculite method for begonias last year and was a total failure. They stayed so tiny for so long that I wasn't able to prick them out and transplant. They sprouted like crazy but most just turned yellow and withered away in the vermiculite.
begonias Thumb of 2015-01-03/kqcrna/5f7238

The echinacea worked great with the vermiculite. They're much bigger, faster growing seedlings and I was able to handle them.
echinacea Thumb of 2015-01-03/kqcrna/2a940b

Karen
North Central Louisiana (Zone 8a)
Planting seeds proves you believe i
LAbegoniac
Aug 8, 2015 7:27 AM CST
Begonia grandis is a beautiful begonia either as an individual plant or in the landscape and is probably the oldest begonia know to us having been immortalized from antiquity in Chinese Art. It is also one hardy in the ground to New York. To see it at its best in the landscape go to this website:
http://dctropics.blogspot.com/2015/08/big-begonia-grandis.ht...

I'll post another comment about begonias from seed since I can only figure out how to post one website per comment.
North Central Louisiana (Zone 8a)
Planting seeds proves you believe i
LAbegoniac
Aug 8, 2015 7:28 AM CST
Begonia grandis is a beautiful begonia either as an individual plant or in the landscape and is probably the oldest begonia know to us having been immortalized from antiquity Chinese Art. It is also one hardy in the ground to New York. To see it at its best in the landscape go to this website:
http://dctropics.blogspot.com/2015/08/big-begonia-grandis.ht...

I'll post another comment about begonias from seed since I can only figure out how to post one website per comment.
North Central Louisiana (Zone 8a)
Planting seeds proves you believe i
LAbegoniac
Aug 8, 2015 7:42 AM CST
Growing begonias from seed, even the rare ones, is very easy, but a bit different. For example I plant in 1 ounce portion cups, putting ice pick holes in bottom, and seed on top of mix with no covering, but then kept under light and in a covered container until fairly large. To down load my complete article go here: http://www.begoniahouston.org/program/GROWING%20BEGONIAS%20F...

Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
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kqcrna
Aug 8, 2015 12:19 PM CST

Moderator

Wow, that website is really something. I never did get seeds for Grandis. Maybe next year.

Karen
Name: Danita
GA (Zone 7b)
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Danita
Aug 8, 2015 12:27 PM CST
Karen, did the B. grandis seeds that I sent you not germinate?
Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Aug 8, 2015 3:44 PM CST

Moderator

No, but it was my fault. Not long after I sowed them my elderly Mother got very sick. I neglected house and home to care for her. My plants all dried out, some plants died... So it was my fault. My Mom then died March 30, and it took me a long time to get all of her "stuff" taken care of.

I might have held back a few seeds, but I'm not sure.

Karen
Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Aug 8, 2015 4:10 PM CST
I am sorry that you have lost your mother.
And I know how events like that interrupt gardening.

I have sprouted Begonia grandis in ordinary cell trays, under lights.
But they take along time so I start Begonias in January or December even,-- if I am organized.
[Last edited by CarolineScott - Aug 8, 2015 4:14 PM (+)]
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Name: Julia
Washington State (Zone 7a)
Garden Photography Region: Pacific Northwest Celebrating Gardening: 2015 Forum moderator Plant Database Moderator I was one of the first 300 contributors to the plant database!
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springcolor
Aug 8, 2015 4:10 PM CST
There is next year Karen. Great piece of mind that you took good care of your mom.
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Name: Danita
GA (Zone 7b)
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Danita
Aug 8, 2015 4:28 PM CST
Oh my goodness, Karen, I'm so sorry about your mother. Group hug

I'll try to collect some fresh seed this fall. They produce tons of seed but I have to actually catch it before it spills or blows away.

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