Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents.

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3
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1answer
266 views

Is this cactus unhealthy, especially at the bottom?

Our cactus is about 4 or 5 inches tall. I think it's looking unhealthy in the lower half. I also think it must receive a larger container. Recommendations? Thanks!
3
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1answer
694 views

What is this plant with long narrow triangle leaves and prickles?

What is the name of the following plant? Is it a kind of cactus?
4
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1answer
98 views

Determine the ID of this cactus

The first picture is from early spring, the second is a more recent picture. I have never seen this type of cactus before and would appreciate if some could identify it.
3
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1answer
87 views

Can someone please ID this succulent

Can someone please ID the succulent seen in the image below:
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1answer
131 views

How to help/not hurt my half dead looking cactus? [closed]

I've had this cactus for a while and at some point I kinda forgot about it. Then suddenly I had the aspiration to save it so I began watering it once a month or so. The only problem is now I have a ...
2
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2answers
246 views

What kind of succulent is this and why are the leaves wilting and changing color?

What kind of cactus is this and what's wrong with him? I got him at the farmer's market and he didn't have a tab that says what conditions or how often you should water. I spray him with water once a ...
2
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1answer
1k views

Why are some of the lower leaves on my cactus turning brown?

I have a cactus standing on my windowsill and for years it seemed pretty healthy, but last month its leaves started to turn a light brown-pinkish, kind of like a salt stone lamp. They also look a bit ...
6
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1answer
176 views

How should I cut a long, curvy cactus?

I have received a cactus that is a bit curvy. Here's some pictures to give you an idea: It's doing well right now but I'm concerned that the curve will eventually break it. Is it possible to cut this ...
4
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1answer
199 views

How to ensure survival and growth of broken cactus

For a while now the top of my cactus had been dislodged from the rest of it, the dislodged area is brown and dead, but since the accident the area below it has also stopped growing. After 2 years of ...
6
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2answers
747 views

What is this succulent with flat hairy leaves?

This succulent is about 1.5 feet tall. The leaves are flat with a white hairy type substance. What is it called?
7
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1answer
431 views

What is this epiphytic cactus with small orange flowers along the stems?

Does anyone know the species of this epiphytic cactus? Even the genus would be a step forward. Could it be a Disocactus sp.? The open flower is less than 2 cm (just under an inch) in diameter. The ...
4
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2answers
370 views

Cactus with a growth

We have this cactus that I believe was supposed to be red at the top but is just dried and shrivelled but the stranger thing is the weird extra cactus growing out the top. Any ideas what it is, I don'...
8
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2answers
962 views

What fertilizer should I use on agave and cactus?

I live in Canada, and have several cacti and large agave plants. It's soon going to be time to take them outside as the weather starts to warm up. They are potted in a mix of coir, sand, fast draining ...
6
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1answer
2k views

White spots at the base of a cactus

Somebody gave me this cactus and I noticed that the base is getting white. Is it normal? Other information: I live in Canada The cactus is indoor and facing the sun all day I used soil for cactus ...
5
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1answer
403 views

What's this cactus with large red and white spines?

I just got this cactus with large red and white spines and I'd like to know its species. It looks like a ferocactus emoryi except the spines are not hooked. But it could be something else as there are ...
7
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1answer
2k views

What is this white crust forming on my cactus during the growing months?

I live in the UK and have a Trichocereus bridgesii/Echinopsis lageniformis "monstrose" cactus that I bought from a garden centre 3 years ago. Every year in early summer several new stems grow from ...
7
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2answers
561 views

How can I determine if cactus seedlings are dead?

I planted some notocactus seeds sometime in September and many have germinated since then. A few weeks ago, there was an incident where some of my succulents may have experienced frost and I can't be ...
8
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3answers
113 views

Does anyone know what type of cactus this is?

Hi all, I recently bought this cactus but haven't had much luck identifying it. Any help or ideas would be very much appreciated. Thanks :)
4
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1answer
222 views

Is this sunburn or something else?

I've put my cacti for wintering into an unheated attic, by a window where the sun falls after 2 P.M and till dusk. Since it's negative temperature outside (so it's already winter in a sense) I didn't ...
3
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3answers
1k views

What is the white stuff on this cactus-type plant?

I have had this plant for more than 10 years now but I do not know its name. What is the name of this plant? The issue is that this plant has a lot of white areas, as shown in the pictures. These ...
3
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0answers
870 views

Why has my prickly pear cactus gone limp? [duplicate]

I have a new prickly pear that I love and it just went limp on me tonight. I checked the soil and it feels moist but not wet and top inch is bone dry. Around the roots is a little damper. The top ...
3
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1answer
115 views

Is this a cactus?

I recently bought cacti seedlings. After one month they don't look like cacti. Any ideas on what this might be? Click photo for full size
4
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1answer
1k views

Why is my cactus drooping? [duplicate]

My cactus has gone all droopy and I don't know what the problem is. I've moved into a place with more light and I water it enough but I don't know what is wrong with it.
4
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4answers
3k views

How to save this blue cactus?

I am unaware of what type it is, I bought it at Wal*Mart, so I was rather suspicious that it had been improperly stored, but I don't know. The base seems very rotted, which I think means that I need ...
3
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2answers
592 views

Why are these succulent leaves withering instead of rooting?

I collected some leaves and put them on to sprout. Instead the leaves withered. I'd like know what happened and how I can avoid it.
7
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1answer
2k views

How to salvage a cactus plant that is half dead

This plant did very well for a year and bloomed. At some point I think I over watered it and it started looking 'dusty' and then parts turned black. I snipped off the worst parts and let it dry out ...
2
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1answer
755 views

What is this cactus and how should I take care for it?

I received my cactus as a gift approximately 10 years ago. I have never known what species of cactus it is and I thought it is time to figure it out. I am unfamiliar with cactus and I don't know if ...
6
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1answer
82 views

Will repotting a cactus after flowering affect the fruit?

It is generally advised against repotting a cactus while it has buds or flowers on it. My Mammillaria prolifera has just finished flowering and it really needs repotting but since it's a self-fertile ...
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3answers
531 views

Cactus ID: Globular, multiple straight prominent ribs, spiny, somewhat wooly, fibrous root

I need help identifying one of my old neglected-so-far cacti. Unfortunately and somewhat deservedly, it has not flowered for me yet. It is the size of an apple (since I have treated it horribly, or ...
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1answer
1k views

What is the legality of growing San Pedro cacti in Florida? [closed]

Clusters of columnar cacti like the San Pedro (Echinopsis pachanoi) are very appealing to me. I want to grow it all around my house. I am aware however that this is considered to be a hallucinogenic ...
8
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2answers
426 views

What is this cactus with paper-looking spindles sticking out all around?

I bought this cactus a while ago and never knew the name of the species. Can someone help me with the name of the plant? A small clone of it is growing on the top of the plant. Should I cut it and ...
5
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4answers
17k views

How to fix a broken cactus

I have been growing this guy for 6 years. He's gotten a little too top heavy and today has fallen over and the top piece (about 9") broke off. The break was very even. I have no idea where to begin ...
4
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2answers
930 views

How do I divide an overgrown Mammillaria cactus?

How do I divide an overgrown cactus (looks similar to Mammillaria vetula subsp. gracilis Preiff)?
3
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1answer
334 views

Cactus Identification: miniature branching species with reddish areolas

This is an approximately 10-year-old specimen of mine. I had a wild guess that it was a Frailea, but having looked at all the recognized species of the genus, I didn't find any that looks like it. ...
4
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2answers
2k views

What is this cactus with flat oval pads and very short spines?

I bought this cactus yesterday. I want to know its name to research how I should take care of it. I'm in a rather cold city (Zanjan in northwestern Iran) with long winters, so I think it's better if I ...
6
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1answer
645 views

How do I safely eradicate mold without hurting cactus seedlings?

Here are some of my seedlings, sown a little bit less than a month ago. As you can see, there's mold starting to form. I am using the baggie method whereby the pot with the seeds is enclosed in a ...
4
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1answer
157 views

What is this cactus and how should I care for it?

I bought this cactus over two weeks ago. What is it's name and how should I take care of it?
4
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1answer
345 views

What columnar cactus species I should select as a rootstock for a Rhipsalis standard?

I want to make a standard(1) with scions from a Rhipsalis pilocarpa, or mistletoe cactus. I need a rootstock that: Is columnar Is unbranched Has good longevity (at least 20 years) Can adapt to high ...
6
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1answer
1k views

What is this cactus with flat pads and spines growing in small patches?

I was given a cutting of a friend's cactus. It is growing in his front yard but he does not know much about it. His cacti are green and segmented some with red bulbs on top. I believe the red bulbs ...
3
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1answer
622 views

How should I prune a cleistocactus that got too tall?

When I have a slender, columnar cactus like a Cleistocactus (pictured below), and it gets too tall, How can I prune it, to get it back to a manageable height?
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2answers
422 views

Will prickly pear thrive under the eaves on the west side of my house?

The front of my house faces due west, with about a 2' overhang underneath the eaves. There is a 12' section between the northwest corner and the walkway leading to my door that has proven very ...
6
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1answer
2k views

Can we root prickly pear pads that are sold in grocery stores as a vegetable?

Can I root prickly pear pads that I buy (presumably for food) in the grocery store? It seems like it would be a great way to get some thornless prickly pear cacti growing. If I were to do it, I would ...
5
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1answer
7k views

Cactus and Succulent in the same pot

I am looking to plant several cacti and succulents together in a single pot. Several of the plants will include a grafted "moon" cactus and a succulent "Eceveria Mazarine" there may be one or two ...
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3answers
2k views

What cacti can grow without cold protection in USDA zone 6b in Pennsylvania?

I'm in USDA hardiness zone 6b. I'm growing eastern prickly pears as outdoor perennials, and would like to grow some other cacti as well. From what I gather, cold hardiness has a lot to do with soil ...
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2answers
1k views

Why does my repotted cactus seem to be dying?

I bought a cactus from my local big chain DIY store a few years back. It was in a tiny pot and all was well. It's really grown over the years so I decided to re-pot it. I used your everyday compost ...
4
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2answers
139 views

How can I prevent a Schlumbergera from dropping buds?

I recently bought a Schlumbergera from a reputable garden centre. It had buds on it when I bought it. It soon flowered and within a couple of weeks the flowers have all fallen off and the remaining ...
4
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1answer
1k views

Are eastern prickly pear cacti pads edible?

Are eastern prickly pear (Opuntia humifusa) cacti pads as edible as the kind you find in the grocery store (Opuntia ficus-indica)? I know the fruit is edible, if everything across the Internet I've ...
3
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4answers
1k views

Why did the leaves on my Christmas cactus suddenly change texture and colour?

I've been growing a cloned Christmas Cactus now for a few months, and it has been doing quite well. I moved to university 4 days ago (from Swindon, England to Bristol, England) and today I notice that ...
9
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2answers
20k views

Why is my cactus droopy?

I have a cactus (pictured) which I bought about a month or so ago. It has been slowly drooping, although the tag said to keep it dry in winter and I have only watered it once when I re-potted it. The ...
5
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1answer
79 views

How does one go about growing a cactus in a terrarium?

I've been searching the web online, and the ideas are all conflicting. Some websites would say cacti are unable to grow in glass jars because the heat trapped will cook the cactus, and other websites ...