Annuals forum: cosmos sulphureus

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Name: Betsy
Texas (Zone 9a)
Region: Texas Composter Butterflies Bookworm Bluebonnets Daylilies
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piksihk
Nov 12, 2016 11:49 AM CST
This cosmos is growing at our MG test garden -- it is a giant! I've grown yellow cosmos in my yard but I've never seen one as big as this one. According to TAMU agrilife extension, yellow cosmos can grow up to 7 ft.

Have anyone grown them this big? Will have to collect seeds of this one...




While the earth remains, Seed time and harvest, Cold and heat, Winter and summer, And day and night Shall not cease. Gen. 8:22
[Last edited by piksihk - Nov 12, 2016 12:44 PM (+)]
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Name: Deborah
midstate South Carolina (Zone 8a)
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Deebie
Nov 14, 2016 8:55 PM CST
OMG, that thing is huge. I've never seen or heard of C. Sulphureus getting that big. Blinking
Name: ZenMan
rural Kansas (Zone 5b)
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ZenMan
Nov 14, 2016 10:07 PM CST
This looks like a good time to start breeding your own Cosmos. Thumbs up
Name: Jai or Jack
WV (Zone 6b)
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Jai_Ganesha
Dec 15, 2016 5:34 AM CST
Impressive!

When I lived down south I sometimes saw them very large but not this large!

The little emberizids love the seeds!
Keep going!
Name: Betsy
Texas (Zone 9a)
Region: Texas Composter Butterflies Bookworm Bluebonnets Daylilies
Native Plants and Wildflowers Amaryllis Cottage Gardener Container Gardener Clematis Plant and/or Seed Trader
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piksihk
Mar 8, 2017 11:33 PM CST
I did collect some seeds of it and grabbed seedlings before they were pulled up (cleaning the bed - weeds aplenty).
A few have buds already. We'll see how big these will get.
While the earth remains, Seed time and harvest, Cold and heat, Winter and summer, And day and night Shall not cease. Gen. 8:22
Name: Vickie
Elberfeld, Indiana, USA (Zone 6b)
Bee Lover Garden Photography Celebrating Gardening: 2015 Daylilies Plant Lover: Loves 'em all! Region: United States of America
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blue23rose
Oct 11, 2018 5:39 PM CST
Just browsing the forums and came across this thread. I have had cosmos growing for several years now and I believe this is cosmos sulphureus that I have. It usually gets 6 feet plus.

This picture was taken this year and the fence is 6 feet tall.


Vickie
May all your weeds be wildflowers. ~Author Unknown
Northern NJ (Zone 6b)
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LorettaNJ
Oct 11, 2018 9:38 PM CST
Is that one plant? We have a Gardener at our community garden who over planted packets of seeds of this Cosmo and the regular pink and whites. They grew like a forest as tall as sunflowers.
Name: Vickie
Elberfeld, Indiana, USA (Zone 6b)
Bee Lover Garden Photography Celebrating Gardening: 2015 Daylilies Plant Lover: Loves 'em all! Region: United States of America
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blue23rose
Oct 12, 2018 4:42 AM CST
My picture shows a multitude of cosmos plants where past years seeds have decided to take root. They would probably get larger if I thinned them out, but I like that they support each other, because they have very shallow roots and the wind takes them down.

I don't need to collect seeds because they just keep coming up every year, but I collect them for friends. Even the seeds from this year have taken off and look like grass growing at the base of the taller ones.

Even though my cosmos looks pretty ratty this time of year, I leave it for the pollinators until it caves to the low temps. Here are a few pictures of the pollinators that love cosmos:
Thumb of 2018-10-12/blue23rose/251c0c

Thumb of 2018-10-12/blue23rose/ab773f

Thumb of 2018-10-12/blue23rose/115953

Thumb of 2018-10-12/blue23rose/1813eb


Thumb of 2018-10-12/blue23rose/1ad5f9


Thumb of 2018-10-12/blue23rose/782ec3


Thumb of 2018-10-12/blue23rose/e123ee

Vickie
May all your weeds be wildflowers. ~Author Unknown
Northern NJ (Zone 6b)
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LorettaNJ
Oct 14, 2018 10:53 AM CST
That's what we are doing but the winds from Michael passing through knocked a lot of them down.
Name: Vickie
Elberfeld, Indiana, USA (Zone 6b)
Bee Lover Garden Photography Celebrating Gardening: 2015 Daylilies Plant Lover: Loves 'em all! Region: United States of America
Region: Indiana Garden Art Annuals Clematis Cottage Gardener Garden Ideas: Level 2
Image
blue23rose
Oct 14, 2018 2:19 PM CST
Oh my. I bet it really did do a number on the cosmos. What kind of wind speed did you get in New Jersey @LorettaNJ?
Vickie
May all your weeds be wildflowers. ~Author Unknown
Northern NJ (Zone 6b)
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LorettaNJ
Oct 14, 2018 6:18 PM CST
I misphrased that. Enough to bring down a nice sized branch from our tree and snap the cosmos in two but no hurricane here. Just the aftermath wind passing through.

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