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Cactus/What kind of cactus is this?

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cactus_1
cactus_1  
QUESTION: My mother recently passed away and I'm caring for one of her cactus plants. I'd like to know what kind it is so I can research info regarding care and watering, especially watering. I don't have a photo of it but have attached one that looks very, very similar to it, if not identical. Ours once had a flower that also looks the same as the one in the photo. Any help would be greatly appreciated. Thank you very much.

ANSWER: I's so sorry about your mother's death and hope you are coping as best as you can.

First, I'm not sure it's a cactus, looks more like a succulent to me but would have to see the spines up close.

2nd, I believe those flowers are straw, the kind stores put on plants to enhance sales.

3rd,  whether it's a cactus or succulent for now I would water very infrequently.  Cactus are dormant and require no watering, succulents require watering when the soil is dry, or some folks only water them when they feel a little softer than usual.

I'll see if I can ID it and let you know if I do. A picture of your mother's plant would help as many are quite similar.

---------- FOLLOW-UP ----------

cacpic5
cacpic5  
QUESTION: Maureen,

Here's a second shot that zooms in a little more.

Thank you so much,
Mike Lyness

ANSWER: Mike,

I am having your question e-mailed to me so that I can see if I can download the images.  I can't from this site.

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QUESTION: Maureen,

I wanted to let you know what I found out before you spent too much time on my problem, as I know you must have tons of questions from other folks. I believe I found what type of plant it is. I may be wrong but from a lot of searching online it looks like it's probably a "Cereus tetragonus" or Fairy Castle. It would be a native of Brazil and of the Acanthocereus genre or genus of cactus.

I could be wrong of course but at any rate the watering and care instructions matched exactly with what you told me to do and I think I'm good to go unless you tell me otherwise. I really, really appreciate your help and advice and I'll be submitting a "rating/thank you" now on the AllExperts page for my question. Wanted to thank you here though in case you don't see the rating replies for some reason.

Many thanks again and I hope I haven't taken too much of your time. Take care and God Bless, Mike.  

Answer
You are absolutely right.  It was driving me crazy because I once had a a Cereus tetragonus and they are lovely.  Good work!  I'm not going to tell you what happened to mine, alas.  Your's is lovely and I'm sure your mother will be watching over both of you.

Maureen

Cactus

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Maureen

Expertise

I can answer questions regarding the care and propagation of cactus and succulents and would actually group these together as folks often mistake one for the other and often their care is quite different. I also have a cold hardy cactus and succulent garden that has been quite successful. The subject in regard to classification of type is enormous and I wouldn't be able to answer all questions by any means. It is really IMPORTANT TO INCLUDE A PHOTO if at all possible and LET ME KNOW WHERE YOU ARE FROM, especially in terms of climate.

Experience

I have learned by reading books, by trial and error and by consulting with folks with much more knowledge. I have primarily grown C&S for the last 20 years.

Organizations
Cactus and Succulent Society of Massachusetts.

Education/Credentials
No formal training. See experience.

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