Cactus and Tender Succulents forum: need help with cacti

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Name: Susan
Vienna, VA (Zone 7a)
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Muddy1
Feb 23, 2017 9:59 PM CST
Hi! Years ago, we sowed seeds for what were supposed to be Saguaro cacti (Carnegiea gigantea). I'm not so sure that's what they are, however.
Here are photos of several of them - do they look like Saguaro?
Also, what's wrong with the bi-color one; have I been watering it too much?
I appreciate any help you experts have to offer! Thanks.
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Name: Susan
Vienna, VA (Zone 7a)
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Muddy1
Feb 25, 2017 9:31 PM CST
I found a photo of young Saguaro that look like mine, so I'm going to assume that's what they are!
Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
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plantmanager
Feb 25, 2017 9:34 PM CST
I'm sorry you didn't get any answers. My guess is that you don't have small saguaros. Take a look at these images and compare them to yours. The structure is totally different.

https://www.bing.com/images/se...
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Name: Paul
southern California
Zone 8B/9A
Region: California Herbs
cahdg6891
Feb 26, 2017 2:31 AM CST
I have a young Carnegiea gigantea that is several inches tall. The photos of your plants look somewhat similar to mine, but the spine length and color are different and your plants are thinner. Not sure yours are saguaros Sad The brownish color in your last photo looks like corking, you can see it on the bottom of mine as well. It's just the plant turning woodier as it ages, completely normal.

I don't have any recent pictures on my phone, but here is a photo I took back in September when I was repotting it. I'll snap some more pictures for you tomorrow in full sunlight! Smiling


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Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Feb 26, 2017 9:40 AM CST
Paul, yours has the accordion folds I'm used to. Sorry I don't know the proper terminology! The saguaro can expand and contract with more water or less water.
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Name: Paul
southern California
Zone 8B/9A
Region: California Herbs
cahdg6891
Feb 26, 2017 5:48 PM CST
Here are some photos...


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Name: Susan
Vienna, VA (Zone 7a)
Birds Echinacea Composter Foliage Fan Hummingbirder Bee Lover
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Muddy1
Feb 27, 2017 9:22 PM CST
Thanks for your input. As soon as I can get my iPhone to cooperate, I'll upload some more photos. In the meantime, I'm "borrowing" this photo from PlantBob (I found it in Plantfiles) of the baby Saguaros which I thought looked like mine.

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[Last edited by Muddy1 - Feb 27, 2017 9:26 PM (+)]
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Name: Susan
Vienna, VA (Zone 7a)
Birds Echinacea Composter Foliage Fan Hummingbirder Bee Lover
Butterflies Region: Mid-Atlantic Critters Allowed Cat Lover Native Plants and Wildflowers Dragonflies
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Muddy1
Feb 27, 2017 9:45 PM CST
Here are some more photos of some of my larger cacti - the largest is 5" tall. These are also grown from seeds which were labeled Carnegiea gigantea.

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Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Feb 27, 2017 9:47 PM CST
Ok, those do look more like it. I can see the folds now. Some of the young ones must have been too full of water and all puffed out!
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Name: Paul
southern California
Zone 8B/9A
Region: California Herbs
cahdg6891
Feb 28, 2017 12:24 AM CST
I agree mine could look different from yours as well because of our Mojave sun.
[Last edited by cahdg6891 - Feb 28, 2017 12:28 AM (+)]
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Georgia (Zone 8a)
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Hamwild
Feb 28, 2017 7:00 AM CST
I hope no one minds my input. nodding I don't think Paul and Susan have the same cacti. Looking at the tops, the color of the spines are completely different and the aeroles don't look the same to me either.

I swear I've seen your cactus in town here before Susan; I just can't remember what it is for the life of me. Sad

I hope it's okay to share a link from another gardening forum, but here are some pictures of Saguro's that other folks have:
http://forums.gardenweb.com/di...

They look more like Paul's cactus IMO.

Name: Paul
southern California
Zone 8B/9A
Region: California Herbs
cahdg6891
Feb 28, 2017 11:12 AM CST
They grow so slowly that it's hard to remember what they look like as seedlings! Blinking Green Grin!
Name: Susan
Vienna, VA (Zone 7a)
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Muddy1
Feb 28, 2017 3:40 PM CST
Thanks, everyone. I wonder whether mine look different because they're being grown indoors? Page 13 of this article compares Carnegiea gigantea grown indoors and outside: https://arizona.openrepository...

I agree that they could be something else, though. It would be nice to nail down an ID because I want to give some away (a dozen plants are too many!). I'll do some more research to see if I can figure out what they are. In the meantime, please keep chiming in!
Name: Paul
southern California
Zone 8B/9A
Region: California Herbs
cahdg6891
Feb 28, 2017 3:58 PM CST
You are welcome! Smiling it's very possible, cacti need strong sunlight to develop their spines to the fullest (the spines help to shade it from the sun). For example, I've seen chollas grown in temperate climates that are sparsely spined compared to ones grown in a hot desert climate.
Name: Susan
Vienna, VA (Zone 7a)
Birds Echinacea Composter Foliage Fan Hummingbirder Bee Lover
Butterflies Region: Mid-Atlantic Critters Allowed Cat Lover Native Plants and Wildflowers Dragonflies
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Muddy1
Feb 28, 2017 9:39 PM CST
Strong sunlight is in very short supply in my house, so I'm surprised the cacti have done as well as they have.
Name: Thijs van Soest
Mesa, AZ (Zone 9b)
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mcvansoest
Mar 2, 2017 8:45 AM CST
Susan, that is indeed a great accomplishment. Interestingly when seedlings, even cacti enjoy a good dose of shade, the best way to kill of young seedlings is to put them outside in the full blazing sun too quickly, but your plants are getting to the point where they shwould need to start getting a regular dose of good sun. A growth light might be something to consider.
Otherwise aside from underdeveloped spines, they will also start getting way more etiolated than they already are - stretchy and floppy from lack of enough strong light - if you look at that indoors grown young Saguaro it has a similar coloring and spine development as your plants, but it looks way more 'barrel' shaped at roughly the same size as yours.

Regarding the lack of ribs on the seedlings: many cacti (think Ferocacti, Goldenbarrels, and also Saguaros) start out without fully developed continuous ribs, but they will look knobbly in their early years. I have uploaded a pic of a 'youngish' Ferocactus emoryi where you can still see the knobbliness, but already see them transforming into ribs.

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I think your seedlings could very well be Saguaros, but their greenness and the yellow-ish spines throws me off. I thought they might be etiolated golden barrel seedlings, however they do look somewhat like those indoor Saguaro seedling pictures in that article you link to, but as I noted above they are already pretty etiolated and would really need to get a lot more good light to stop that process from continuing. A growth lamp might help them show their true 'colors', but be careful when moving those plants into more light or under a growth light - they are not used to it and will probably need to be adjusted to more light/sun exposure carefully otherwise they could get scorched pretty badly and at that size, that could well be fatal.
Name: Susan
Vienna, VA (Zone 7a)
Birds Echinacea Composter Foliage Fan Hummingbirder Bee Lover
Butterflies Region: Mid-Atlantic Critters Allowed Cat Lover Native Plants and Wildflowers Dragonflies
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Muddy1
Mar 2, 2017 6:42 PM CST
They actually don't have a very bright future in my house in Northern Virginia, even if I put them under a grow light.

I have re-homed some, and am trying to get rid of more. If any of you are interested and it is legal for me to mail them to your state, let me know!

I took a look at the regs, and it seems okay to send houseplants to Arizona without an inspection certificate. I'm assuming that California doesn't allow any uninspected plants, but I didn't check. My daughter wants to keep some, but I would be thrilled to mail others to places where they could eventually be planted in the ground.

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