Member of the family Cactaceae. Desert succulents.

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11
votes
3answers
300 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 ...
10
votes
2answers
807 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 ...
8
votes
3answers
216 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
votes
2answers
208 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 ...
8
votes
1answer
716 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 ...
8
votes
1answer
141 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 ...
7
votes
1answer
299 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 ...
6
votes
1answer
716 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
2answers
152 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 ...
5
votes
1answer
194 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 ...
5
votes
1answer
144 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?
4
votes
1answer
36 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 ...
4
votes
1answer
68 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 ...
3
votes
1answer
79 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?
3
votes
0answers
394 views

brown patches on 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 ...
2
votes
1answer
39 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. ...
2
votes
1answer
277 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
votes
2answers
105 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 ...
1
vote
2answers
46 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 ...
1
vote
1answer
49 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 ...
1
vote
2answers
60 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 ...
0
votes
1answer
71 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 ...
0
votes
1answer
22 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 ...