Member of the family Cactaceae. Desert succulents.

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Repotting a cactus after flowering but before fruits

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 ...
3
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2answers
65 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
49 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 ...
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2answers
84 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
92 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 ...
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2answers
45 views

How do I divide an overgrown Mammillaria cactus?

How do I divide an overgrown cactus (looks similar to Mammillaria vetula subsp. gracilis Preiff)?
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1answer
57 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. ...
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2answers
82 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 ...
4
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1answer
62 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
70 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
51 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 ...
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1answer
126 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 ...
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1answer
36 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
53 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 ...
4
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1answer
47 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 ...
3
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1answer
107 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 ...
4
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2answers
177 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
89 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
56 views

How can I prevent 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 ...
2
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1answer
63 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 ...
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2answers
119 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 ...
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1answer
472 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 ...
4
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1answer
49 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 ...
4
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1answer
98 views

What should I look for when selecting lights for indoor cacti?

We grow cacti indoors due to the weather (UK). What should we look for when selecting lights? We have had mixed results with a new lighting system and have started to lose some. See one of the old ...
6
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1answer
996 views

Why Hasn't my Cactus Grown Deadly Spines?

I recently purchased a small cactus plant from my local store for about $5. I've been giving the cactus lots of sunlight and a good watering every week. I've noticed that since I bought it, the ...
4
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1answer
60 views

What are these growths on my winter hardy Opuntia?

I received some winter hardy prickly pear pads from a friend last fall. They rooted well, survived the winter well (better than many other plants around here), and are putting out new growth. On the ...
3
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1answer
98 views

Why has my cactus yellowed and softened, and how can I help it live?

I had a cactus at work since the end of March. It is my first cactus and I don't really know if I was watering it correctly or if I missed something else, but now it's turned yellow and became softer. ...
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2answers
76 views

What purpose do joints serve on a dragon fruit (pitaya)?

I just bought a Pink Delight Dragon Fruit. I noticed that all of the cacti at the store had joints, dried flesh that tapers to small point. They seem like a weak point to me, a brittle point that can ...
4
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1answer
151 views

Why has my cactus has turned red/ beige at its base?

One of my cactus turned red at its base about a year ago and it has since spread upwards. Some websites say it is a natural ageing process but I doubt so because it is still so small! Now another of ...
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1answer
62 views

Why did our cactus die?

We had a cactus named eddy and he died, he had a stretched body with a sphere on top as a head and two little spheres attached to it like eyes. He looked like Echinocereus triglochidiatus but with ...
4
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1answer
110 views

identify the type of cactus

My friend showed me this picture of a cactus and we would like to buy one. The problem is we don't know the name. Does anybody recognize it? Does it produce flowers?
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1answer
89 views

Why doesn't my night-blooming Cereus produce flowers?

I have had a night-blooming Cereus for several years and it has yet to bloom. A friend has one and it blooms no problem. This plant is indoors and keeps growing, but no blooms. What can I do to make ...
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1answer
85 views

What type of gloves should be worn when dealing with cacti?

What type of gloves should be worn when dealing with cacti? Standard gardening gloves seem to offer little protection. Leather work gloves offer more protection, but end up attracting and collecting ...
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1answer
37 views

What tools are available to deal with fallen cacti and cactus pieces?

After pruning cacti, I am left with many fallen pieces on the ground which, depending on the cactus type, have varying degrees of difficulty in picking up and disposing of. Is there a standard tool ...
3
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1answer
483 views

Why are leaves falling off of my Prickly Pear cactus?

I just moved into a new home in Phoenix, AZ, and now have a lot of cacti to tend to. I do not know their care history, or how much/how often they are watered. One of the largest Prickly Pear cacti ...
2
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2answers
150 views

How do I treat the survived parts of a cactus after some of it has rotten to prevent the problem spreading?

I have a cactus consisting of three "cylinders" growing from the same center point. Recently one of the cylinders started rotting rapidly and I had to remove that part. While I was doing that the ...
2
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2answers
75 views

Are there cacti that don't rot when overwatered?

I've got yet another cactus rotten and this was most likely causes by overwatering. I'll try to rescue it but I'll likely need a new one anyway. Are there perhaps cacti that don't rot when ...
7
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2answers
189 views

cultivating a cactus from cutting

I've recently gotten a san pedro (Echinopsis pachanoi) cutting as a gift. I'm trying to take care of it as good as possible, but I'm not sure if I'm doing it the right way. The situation is: the ...
6
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1answer
1k views

Why is my cactus purple?

This has been going on for a while (about a year), one of my cacti has turned purple. I've just replanted it after its pot fell and broke (no, it did not spend the year on the ground). What is the ...
6
votes
1answer
763 views

What are these brown patches on my acanthocereus tetragonus (fairy castle cactus)?

I've had this pair of fairy castle cacti for several years now, and they've done fairly well. However, I noticed today that they have developed brown patches over most of their stems and a few areas ...
5
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1answer
173 views

How old do night flowering cereus get before they bloom?

I have a night flowering cereus that is about five years old. It is a foot tall and has a single stem. It is in a four inch square plastic pot. Is it going to flower anytime soon?
5
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1answer
234 views

Can any cacti be used as a scion on a non cactus succulent rootstock?

Anything in the cactus family can be grafted onto anything else in the cactus family, even jungle cacti to desert cacti. I've even grafted a Schlumbergera to a prickly pear. I would like to know, just ...
8
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3answers
245 views

How to manipulate a cactus with thick long spines?

I'm thinking of buying a cactus. Shops have a lot of those and one of the variables is the size and density of spines. Cacti with rare huge spines (something like 15 millimeters long and about 1 ...
8
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1answer
169 views

Does Rebutia grow better when grafted onto an Echinopsis?

I have tried growing rebutias before, and failed because the plants lacked vigor and grew slowly. Would they do better if I flat-grafted it onto a columnar Echinopsis, to increase vigor? Are there any ...
11
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3answers
400 views

What should I do if the soil shrinks and separates from the flowerpot walls?

Recently we relocated a cactus into a new flowerpot. When it was planted the soil would evenly occupy the flowerpot and adjoin the flowerpot side walls. The soil isn't cactus soil, but just regular ...
8
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2answers
227 views

What's a good water system for my cactus plant during holidays?

I have a very resilient cactus that can be left alone for a month without consequences. Now, I want to leave it alone during two months and leave it some water system. I have seen little earthen ...
11
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2answers
1k views

How should I repot these overgrown and delicate plants?

I've got several plants that are probably overdue to be repotted. One of them is a cactus with lots of new growth and sharp spines. And the other is a jade where many more of the cuttings survived ...
7
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1answer
336 views

Do opuntia (prickly pear) cacti readily form hybrids in the wild?

I suspect the answer is yes, because they are the most diverse group of cacti. The reason I ask is that we actually have four varieties/species and I'm having a lot of trouble identifying them! The ...
9
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1answer
985 views

What is this white growth on my cactus?

I have several cacti growing in my yard and one (t. pachanoi, if it matters) has developed a white layer across the top of the plant. It is very fine and looks almost sandy, like perhaps a mould or ...