Seeds forum: New Guinea impatiens

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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
Feb 3, 2014 9:09 AM CST

Moderator

Do you grow them from seeds? How long before last frost do they need to be sown?

Karen
Name: Allison
NJ (Zone 6a)
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Onewish1
Feb 3, 2014 10:16 AM CST

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never tried them
Name: Julia
Washington State (Zone 7a)
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springcolor
Feb 3, 2014 11:35 AM CST
Never grown them from seed because I never can get them to flourish when I buy plants. Not sure what is wrong, maybe not warm enough. I did see seeds in the HPS catalog. Divine Hybrid Series. says it has bronze foliage. If you try keep us posted.
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Name: woofie
NE WA (Zone 5a)
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woofie
Feb 3, 2014 11:48 AM CST
I've tried growing them from seed a couple of times, but they never did much. And I have the same problem as Julia.
Confidence is that feeling you have right before you do something really stupid.
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
Feb 3, 2014 12:18 PM CST

Moderator

Well that doesn't sound encouraging Sad

Karen
Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Feb 3, 2014 10:04 PM CST
I have just sowed some under lights.
Last year, I started some in March, and they were very small,--- so this year I am starting earlier.
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
Feb 4, 2014 6:13 AM CST

Moderator

Thanks, Caroline. So they sprouted easily enough and did OK except for being slowpokes? I assume that was with bottom heat and under lights?

Karen
Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
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CarolineScott
Feb 4, 2014 9:21 AM CST
No bottom heat ,but my lights are beside the furnace.
Lights and very warm.
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
Feb 4, 2014 12:55 PM CST

Moderator

Thanks, Caroline.

Karen
Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Feb 15, 2014 9:52 AM CST
But this year there is a terrible algae problem in the tray.
And I am not seeing any germination.
I have scratched the algae out as best I can, and I also spread fine vermiculite over.
And the algae just grows back!???
Name: Allison
NJ (Zone 6a)
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Onewish1
Feb 16, 2014 5:25 AM CST

Moderator

can always try peroxide.. or sprinkle some cinnamon on the soil
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
Feb 16, 2014 6:39 AM CST

Moderator

Caroline, did you sterilize the soil before sowing? I think that helps prevent it. Not scientific, just a personal observation. I also remove the humidity dome after germination and run a fan on them at least for a few hours a day. (my house is too cold in winter to run a fan all the time!)

I think algae usually results from too much water and/or not enough light. Did you use a seed mix? In my experience I find less algae with regular potting mix than seeding mix. I never use the stuff anymore. I have rarely had a speck of algae but it happens a lot with my wintersown stuff (always wet and not much natural light...)

Bottom watering , rather than from above, might help too.

Karen
Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Feb 16, 2014 7:25 AM CST
Thanks. I have not tried the cinnamon, but all the others.
These are in potting mix, but I had added peat because I started a batch of blue poppies.
Drying killed the coleus seedlings, but not the algae.
Everything was sterilized with dilute hydrogen peroxide solution.
Ordinary impatiens are doing fine in the same tray.

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
Feb 16, 2014 7:39 AM CST

Moderator

I don't think peroxide equals sterilization. It might kill some organisms but not all. Cooking will kill everything. I always cook my potting mix before sowing for indoors under lights, and I don't get algae. I don't sterilize for wintersown stuff, and some years they get a lot of algae. Not every year, though. I think weather is the biggest factor.

Karen

Name: Caroline Scott
Calgary (Zone 4a)
Charter ATP Member Region: Canadian Bulbs Winter Sowing Enjoys or suffers cold winters Lilies
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CarolineScott
Feb 17, 2014 10:46 AM CST
When you say "cook" do you mean in oven or by pouring boiling water?

I looked up my notes from last year and the New Guinea were the Bronze
leaf ones and they germinated in 8 days. Those were from Swallowtail.

I went and got Pro Mix to do the rest of seeds.
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
Feb 17, 2014 10:50 AM CST

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I either bake it in the oven or microwave. I moisten and cover it before cooking. It stinks!

Karen
Name: woofie
NE WA (Zone 5a)
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woofie
Feb 17, 2014 12:20 PM CST
It's quicker in the microwave (although you have to be careful what kind of container you use) and doesn't stink up the house so bad as using the oven. DH does NOT appreciate me cooking dirt! Hilarious!
Confidence is that feeling you have right before you do something really stupid.
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
Feb 17, 2014 12:37 PM CST

Moderator

Mine either. I usually do it when my husband is at work. And as soon as it's cooked, I put the container outside in an attempt to limit the stench. I usually use the microwave, too.

Karen
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Feb 17, 2014 3:54 PM CST
I don't think there are many people who go to the effort of cooking their potting soils. So, I am assuming it should not be necessary, or more people would do it. I do some times get green stuff growing in my little seed trays, and I think it is caused by being way to heavy with the watering. I grow quite a few plants from seed each year, vegetables and flowers, the first year I washed out every pot, scrubbed them in the sink with detergent and bleach, did all that kind of sanitary stuff, then the next year I tapered off on all that a bit, this year I did not even wash the pots, just knocked out the dirt. I have not even bought any potting soil at all this year, just my compost straight out of the pile. Now I have not grown without problems, a few of the cell packs did develop some green stuff on top, but very few. Also I am having some problem with the compost compacting too much, so I have started adding Perlite, maybe that will solve one problem, and maybe it will solve the compaction and the drainage also. I think if I can ever learn to water properly 90 percent of my seed starting problems will be solved, I just find it so hard to control myself with the watering. I have never grown New Guinea Impatiens from seed, but I did pretty good with regular impatiens, but because of the blight or virus, or what ever it was that killed so many last year it was recommended not to plant impatiens for a couple of years, so I did not plant any this year, I am trying Vinca for the first time as a replacement along with coleus.
[Last edited by Seedfork - Feb 17, 2014 4:25 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
Feb 17, 2014 3:58 PM CST

Moderator

And where are you growing? in a greenhouse? Inside your house under lights? or outside? Since you live in Al...

I don't sterilize for outside growing, only inside under lights.

Karen

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