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Avatar for keithp2012
Aug 3, 2015 1:23 PM CST
Name: Keith
Long Island, NY (Zone 7a)
Zinnias Plays in the sandbox Roses Lover of wildlife (Raccoon badge) Plant Lover: Loves 'em all! Organic Gardener
Region: New York Native Plants and Wildflowers Lilies Seed Starter Spiders! Enjoys or suffers hot summers
I'm growing Poinsettia amaranth. I noticed "weeds" in my yard that look identical just in plain green and the flowers are similar just not in color.

Young plants almost have that line in the leaves like clover do to form a pattern.

Will they hybridize, and if pigweed survives here does that mean my ornamental amaranth will self seed all over my yard?
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Aug 3, 2015 5:30 PM CST
Name: Donald
Eastland county, Texas (Zone 8a)
Raises cows Enjoys or suffers hot summers Region: Texas Plant Identifier
I think you are referring to Amaranthus palmeri which is called pigweed in my area, but more commonly called 'Carelessweed'. Also commonly called pigweed is Portulaca oleracea which is a type of purslane. I think your question is a good one. I've wondered if the domestic garden types of Amaranthus would hybridize with the native weed types but don't know the answer.
Donald
Avatar for keithp2012
Aug 5, 2015 9:54 AM CST
Name: Keith
Long Island, NY (Zone 7a)
Zinnias Plays in the sandbox Roses Lover of wildlife (Raccoon badge) Plant Lover: Loves 'em all! Organic Gardener
Region: New York Native Plants and Wildflowers Lilies Seed Starter Spiders! Enjoys or suffers hot summers
Yes, I think I have the red root pigweed growing wild here.

No idea where it came from as seedlings are everywhere, my guess is in birdseed.
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Aug 5, 2015 1:19 PM CST
Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

Region: United States of America Region: Ukraine Region: Florida Charter ATP Member I was one of the first 300 contributors to the plant database! Million Pollinator Garden Challenge
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There are a few "weedy" type Amaranthus commonly called Pigweed, these two in the database have photos:
Prostrate Pigweed (Amaranthus albus)
Redroot Pigweed (Amaranthus retroflexus)

There's a beautiful ornamental Amaranthus, commonly called Summer Poinsettia that is a perennial in warmer zones and acts as an annual in colder climates. Amaranthus tricolor: http://garden.org/plants/searc...

I don't know if cross pollination could occur between the weedy variety and the ornamental variety of Amaranthus or how long seeds are viable for any Amaranthus; I'd think they'd need warmth for germination.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!


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Sep 19, 2015 1:57 PM CST
Name: Dirt
(Zone 5b)
Plant Lover: Loves 'em all! Region: Utah Bee Lover Garden Photography Million Pollinator Garden Challenge Photo Contest Winner: 2014
Photo Contest Winner: 2015 Photo Contest Winner: 2016 Photo Contest Winner 2018 Photo Contest Winner 2019 Photo Contest Winner 2020 Photo Contest Winner 2021
Keith,
Yes and yes.

'Weedy' Amaranthus are varied natives across North America; A. retroflexus is quite ubiquitous
Several years ago I started with one 'Red Garnet' amaranth plant--it seeded itself all over my yard, and its progeny have done the same.
Every year it is a surprise where they will come up and what they will look like.
This was a 2013 garden hybrid


Here are some pics from this year
Thumb of 2015-09-19/dirtdorphins/b656ca
I usually pull the green ones, but I let this one go and it has purple flowers
Thumb of 2015-09-19/dirtdorphins/d23c84
The green one and the red one in this pic (click to enlarge) both came from the same seed head sowed here last fall.
They are obviously cross-pollinating with something else.
Avatar for keithp2012
Sep 19, 2015 2:30 PM CST
Name: Keith
Long Island, NY (Zone 7a)
Zinnias Plays in the sandbox Roses Lover of wildlife (Raccoon badge) Plant Lover: Loves 'em all! Organic Gardener
Region: New York Native Plants and Wildflowers Lilies Seed Starter Spiders! Enjoys or suffers hot summers
dirtdorphins said:Keith,
Yes and yes.

'Weedy' Amaranthus are varied natives across North America; A. retroflexus is quite ubiquitous
Several years ago I started with one 'Red Garnet' amaranth plant--it seeded itself all over my yard, and its progeny have done the same.
Every year it is a surprise where they will come up and what they will look like.
This was a 2013 garden hybrid


Here are some pics from this year
Thumb of 2015-09-19/dirtdorphins/b656ca
I usually pull the green ones, but I let this one go and it has purple flowers
Thumb of 2015-09-19/dirtdorphins/d23c84
The green one and the red one in this pic (click to enlarge) both came from the same seed head sowed here last fall.
They are obviously cross-pollinating with something else.


Thank you for sharing the photos! The purple one is so unique you should try and get more so it's not lost.

I'm keeping mine in area that gets weeds so the seeds drop and I'll see if they survive winter and sprout in spring.
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Sep 19, 2015 2:54 PM CST
Name: Dirt
(Zone 5b)
Plant Lover: Loves 'em all! Region: Utah Bee Lover Garden Photography Million Pollinator Garden Challenge Photo Contest Winner: 2014
Photo Contest Winner: 2015 Photo Contest Winner: 2016 Photo Contest Winner 2018 Photo Contest Winner 2019 Photo Contest Winner 2020 Photo Contest Winner 2021
Thanks Keith!
I thought it was a neat variation Smiling
We'll see what the bees come up with next year Hilarious!
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