Ask a Question forum: All marigold seedlings have even purple marks on all leaves. Normal or disease?

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Utah
TtiGeR
Mar 7, 2018 12:02 PM CST
I sowed some marigold seeds a few weeks ago. All the seedlings planted in soil and hydroponic setup have evenly distributed purple spots on the leaves from the beginning.

The only exception is the cotyledons. None of the cotyledons have any purple spots.

They only appeared on the marigold - not other plants.

I have never seen healthy leaves with purple spots. But I also haven't ever seen spots that are so evenly distributed. Is this normal? What are these dots called?

My friend told me it's probably just this variety. I'm slightly worried if this is a weird disease.
Thumb of 2018-03-07/TtiGeR/d4ddaa

Name: Carole
Lake Macquarie, Australia
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carolem
Mar 7, 2018 4:38 PM CST
@TtiGeR Hi, and welcome Smiling

I'll be interested to see what responses you get; because sorry I don't know either. I have Dwarf Marigold growing but like you, haven't seen this before. Hoping too that it's the variety; if so, quite unique!

If you still have the seed packet; it could be worth making contact with the supplier.
If you truly love nature, you will find beauty everywhere.

Vincent Van Gough
[Last edited by carolem - Mar 7, 2018 4:38 PM (+)]
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Name: Carole
Lake Macquarie, Australia
Butterflies Bookworm Region: Australia Birds Bee Lover Dragonflies
Garden Photography Salvias Seed Starter Enjoys or suffers hot summers Native Plants and Wildflowers Annuals
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carolem
Mar 7, 2018 10:53 PM CST
http://www.weekendgardener.net...

....back again, and I thought to pass this one along to you; it may be relevant. Your soil did appear very dark, perhaps moist?? That can impact on bacterial diseases ......... maybe not good news but perhaps can be reverted.

Hopefully it's not that! Smiling
If you truly love nature, you will find beauty everywhere.

Vincent Van Gough
Utah
TtiGeR
Mar 7, 2018 10:59 PM CST
Thank you so much @carolem !

I did contact the supplier as well, but they haven't responded.

The picture was actually found online - with the exact same color and spot patterns. I tried to take a few pictures myself, but my phone's camera isn't very good and the purple dots were barely visible. So I "stole" the picture instead since it's much clearer. The website listed the picture, didn't say anything other than "marigold seedling".

I have some marigold seeds sowed hydroponically as well - exact same symptoms.

The strange thing is the purple color is there as early as the first pair of leaves appeared, and the spots are so evenly distributed. Every single seedling has the same symptom.

It would be really very interesting if it's indeed just this particular variety.
Name: Carole
Lake Macquarie, Australia
Butterflies Bookworm Region: Australia Birds Bee Lover Dragonflies
Garden Photography Salvias Seed Starter Enjoys or suffers hot summers Native Plants and Wildflowers Annuals
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carolem
Mar 7, 2018 11:07 PM CST
http://homeguides.sfgate.com/m...

it will be interesting to see what feedback you get from the supplier. Have you the seed packet still? Does it show coloured spots on the leaves like yours are exhibiting?

The article above does seem to suggest that it's perhaps not the variety you have ........ but I hope you will find out otherwise.

Keep us posted (and good luck!). Smiling
If you truly love nature, you will find beauty everywhere.

Vincent Van Gough
Utah
TtiGeR
Mar 7, 2018 11:12 PM CST
G'day @carolem ! Just realised you are an Aussie as well! We just moved to Utah from Sydney last year.

I did saw a picture about the fungal leaf spots for marigold (see below). They look more like burns to me and are not that symmetrical like mine.

bugwoodcloud.org/images/768x512/1525427.jpg

Unfortunately, I cannot find the seed packet anymore but do not recall seeing those marks.

I will keep this post updated if I hear back from them.
Name: Carole
Lake Macquarie, Australia
Butterflies Bookworm Region: Australia Birds Bee Lover Dragonflies
Garden Photography Salvias Seed Starter Enjoys or suffers hot summers Native Plants and Wildflowers Annuals
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carolem
Mar 7, 2018 11:20 PM CST
you will be well settled in now to your new home-place.

Yes I will keep watching this thread for updates on your marigolds.
If you truly love nature, you will find beauty everywhere.

Vincent Van Gough
Name: Laurie b
Western Washington (Zone 7b)
Houseplants Region: Pacific Northwest Sedums Orchids Tropicals Region: Mexico
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lauriebasler
Mar 8, 2018 1:01 AM CST
Hi @TtiGeR:

I found this so fascinating and unusual that I googled the following:
marigold seedlings have purple dots on leaves.

A lot of articles came up. A treatable leaf spot was mentioned: (copied and pasted)
Alternaria Leaf Spot, Purplish spots form on leaves and stems (bacterial)

You have probably done the same, but just in case you have not,
Here is an article with a picture.

https://www.extension.umn.edu/....

Your markings are a bit more symmetrical. Best of luck with your marigolds.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Mar 8, 2018 6:01 AM CST
I would think since it's on all of them and it's so symmetrical it is probably normal for that cultivar. A disease would be less symmetrical and not be on all of them right off the bat. What is the name of the marigold?
Name: Laurie b
Western Washington (Zone 7b)
Houseplants Region: Pacific Northwest Sedums Orchids Tropicals Region: Mexico
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lauriebasler
Mar 8, 2018 7:29 AM CST
I think so too! Strangest thing I have ever seen.
Name: Sally
central Maryland
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sallyg
Mar 8, 2018 8:40 AM CST
I agree with sooby.
..come into the peace of wild things..-Wendell Berry
Life is a buffet (anon)
Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Mar 8, 2018 9:02 AM CST
It's normal.
I've seen cultivator's like that.
In fact ! 😮 ! most of what they sell in stores and nurseries.
😎😎😎
Anything i say, could be misrepresented, or wrong.
Utah
TtiGeR
Mar 8, 2018 6:50 PM CST
sooby said:I would think since it's on all of them and it's so symmetrical it is probably normal for that cultivar. A disease would be less symmetrical and not be on all of them right off the bat. What is the name of the marigold?


Thanks @sooby. I don't have the packet any more but remembered it was just "Marigold - Petite Orange".

I don't think think a latin name was there.
Utah
TtiGeR
Mar 8, 2018 6:51 PM CST
Philipwonel said:It's normal.
I've seen cultivator's like that.
In fact ! 😮 ! most of what they sell in stores and nurseries.
😎😎😎


Thanks @Philipwonel

I'm glad you have seen a similar cultivator.
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
Dreams don't work unless you do.
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greene
Mar 8, 2018 7:27 PM CST

I found another article suggesting alternaria leaf spot.
https://negreenhouseupdate.inf...
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Mar 9, 2018 5:55 AM CST
TtiGeR said:

Thanks @sooby. I don't have the packet any more but remembered it was just "Marigold - Petite Orange".

I don't think think a latin name was there.


I looked for pictures of 'Petite Orange' on the web but none were close enough to the leaves to see if they had the spots. The cultivar name 'Petite Orange' is what I was looking for, the Latin name is Tagetes patula just FYI.

This is a picture of Alternaria on marigold:
https://www.forestryimages.org...

From the history given it seems unlikely, but just in case.
Name: Celia
West Valley City, Utah (Zone 7a)
Pour vivre parmi les fleurs
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Zencat
Mar 9, 2018 8:31 AM CST
I just want to Welcome! TtiGeR to Utah! Hurray!

The marigold is interesting, too. It does seem to be inherent in the plants rather than disease.

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