Winter Sowing forum: Impatiens

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Name: Dora
Calgary (Zone 3a)
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dorab
Apr 18, 2015 1:11 PM CST
I overlooked a package of impatiens seed that were of precarious viability and with instructions to provide at least 8 weeks of cold weather before providing warmth for germination.

The weather here has been warm this spring, but the nights are cold so I have put out a WS jug in the shade, hoping they will get at least some cool weather and will sprout.

Does anyone have experience with impatiens seed - and are they really that fussy about a cold period?
Dora
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
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Weedwhacker
Apr 18, 2015 7:06 PM CST
Hi Dora --

I've grown impatiens from seed many times, and, while it does tend to be a bit "iffy," I've never given it the cold treatment before (because I had never heard that!). I've always gotten by far the best germination from seeds I've saved from my own plants (without any special treatment). Hmmm... now you've got me wondering about it... but at any rate, I've grown them without the cold treatment plenty of times, which I guess is the answer to your original question Smiling
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Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Apr 19, 2015 4:33 AM CST
Impatiens walleriana? I've grown them many times, inside under lights, using bottom heat.

Clothier says "Impatiens walleriana , buzzy lizzy , ,Type= a/p , , surface sow in warm light @ 77ºF, grow on @ 65ºF , 7-20d"

Karen
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 19, 2015 4:53 AM CST
Apparently some of the impatiens species need, or prefer, stratification so it would help to know what impatiens it is.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member Celebrating Gardening: 2015 I was one of the first 300 contributors to the plant database! I helped beta test the first seed swap Region: United States of America Region: Michigan
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Weedwhacker
Apr 19, 2015 7:01 AM CST
Sue, good call -- when I think "impatiens," it's the common walleriana type... but of course there are other species! *Blush*

@dorab -- are the seeds you have for the common "busy Lizzie" type of imps, or something else?
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Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 19, 2015 7:28 AM CST
Sandy, that's what I automatically think of too - the only reason I then thought other kinds might appreciate stratification was that we have a lot of native jewelweed (Impatiens capensis (hummingbird food!) growing wild around here. So I looked that up and that one apparently does benefit from stratification.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member Celebrating Gardening: 2015 I was one of the first 300 contributors to the plant database! I helped beta test the first seed swap Region: United States of America Region: Michigan
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Weedwhacker
Apr 19, 2015 7:33 AM CST
I have the jewelweed here, too - in fact, the other day I had to stop DH from throwing some stuff he had cleaned up in the yard on top of a really nice patch of it (which isn't up yet, but it probably wouldn't have mattered if it was - he would have still put the stuff there), and want to try to get some seeds from it this year... that's why I'm *Blush* .

Rolling on the floor laughing
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Name: Dora
Calgary (Zone 3a)
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dorab
Apr 19, 2015 9:35 PM CST
The seeds are impatiens bicolor - I have since done a quick google and they are from the Himalayas.

Thanks. I guess I will have to see if I get anything, but don't really want to wish more winter weather on anyone just so my impatiens will germinate!
Dora
[Last edited by dorab - Apr 19, 2015 9:55 PM (+)]
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Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Apr 20, 2015 4:16 AM CST
Assuming that they are walleriana type, they need heat, not cold.

Karen
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 20, 2015 6:00 AM CST
dorab said:The seeds are impatiens bicolor - I have since done a quick google and they are from the Himalayas.

Thanks. I guess I will have to see if I get anything, but don't really want to wish more winter weather on anyone just so my impatiens will germinate!


It's hard to find requirements for this species - one website says it just needs a cold treatment, another says it needs both cold treatment and oscillating temperatures. Neither give specifics.

Yes, please don't inflict us with more winter weather - there's even possible flurries in our forecast for Thursday Grumbling

Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Apr 20, 2015 8:05 AM CST
Dora, you may want to check the Alberta noxious weed list.
Himalayan impatiens were on it, so I quit growing them.
But they were a lovely plant, but they will self seed.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 20, 2015 8:46 AM CST
Himalayan impatiens is Impatiens glandulifera, so not the same as the plant in question I. bicolor.
Name: Dora
Calgary (Zone 3a)
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dorab
Apr 20, 2015 11:49 AM CST
After some consideration, I am thinking the jug will need to go into the back of the fridge for a month or so in a plastic bag. Maybe my roommate/tenant won't notice.
Dora
Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Apr 20, 2015 3:18 PM CST
I'm still trying to figure out what plant you are talking about. Is it not I. walleriana? Do you have a botannical name?

Karen
Name: Dora
Calgary (Zone 3a)
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dorab
Apr 20, 2015 3:35 PM CST
As far as I have been able to determine the botanical name is Impatiens bicolor, which to my mind shows a lack of imagination. Flora of Pakistan at efloras.org lists it as follows:

Impatiens bicolor Royle, Illustr. Bot. Himal. 151. t. 28. 1834. Hook. f. in Rec. Bot. Surv. Ind. 4:8.1904; R.R. Stewart, l.c. 464.

Lower Taxa (even more unimaginatively)

•Impatiens bicolor subsp. bicolor
•Impatiens bicolor subsp. pseudo-bicolor (Grey-Wilson) Y. Nasir

Some sites list it as closely related to I. niamniamensis.


Dora
[Last edited by dorab - Apr 20, 2015 4:31 PM (+)]
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Name: Karen
Cincinnati, Oh (Zone 6a)
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kqcrna
Apr 20, 2015 3:59 PM CST
I saw that Flora of Pakistan hit, also wondered at that name. I don't think that's a botannical name. But it says it's most closely related to I. niamniamensis, and PF says to direct sow after last frost, which would indicate no cold treatment.
http://davesgarden.com/guides/pf/go/38288/

B&T also says warmth
http://b-and-t-world-seeds.com/cartall.asp?species=Impatiens...

Tropicals generally don't require cold as such conditions are not available to them in nature...

Karen
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Apr 20, 2015 6:15 PM CST
Karen, Impatiens bicolor is a valid botanical name, both TROPICOS and IPNI have it. It isn't necessarily tropical, being from the Himalayan Mountains. According to an 1863 reference on the Biodiversity Heritage Library (Curtis's Botanical Magazine), specimens were gathered at an elevation of 4,000 feet. Flowers are white and purple hence, presumably, the specific epithet of bicolor. Not sure if this link to the reference will work but I'll give it a try: http://biodiversitylibrary.org/page/438963 (Edit: yes it works, for me anyway)
[Last edited by sooby - Apr 20, 2015 6:17 PM (+)]
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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
Apr 21, 2015 3:08 AM CST
"most closely related to I. niamniamensis" . I was guessing it was tropical based on that.

Karen

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