Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents, but for non-cacti succulents use the [succulents] tag. Use this tag with questions about caring, propagating and identifying cactus.

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3
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1answer
4k views

Can I plant succulents and cactus in the same pot?

I have 3 plants, Gasteria, Haworthia and one cactus, the Euphorbia enopla. I have the appropriate soil with drainage but I was told the cactus would not do well with the others. How would I go about ...
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Orange and White thing in my new house plant soil

I got these new plants from Walmart just a week ago ( Monday ) and I did some research saying to water them once a week so I waited until Wednesday to water them. The research told me to water until ...
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1answer
168 views

Is this a typical growth habit for a cactus?

I was re-potting my 9+ year old cactus to a bigger pot yesterday and noticed a sizable portion of its stem is submerged. Is this a typical growth habit? What are the chances that this stem might rot ...
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1answer
103 views

Is My Cactus Doing Well?

My wife and I are a bit concerned with the appearance changes of our cactus. The plant was always growing fast, however the spring accelerated the growth even more. Some time ago we noticed the ...
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1answer
330 views

Overwatered cactus

I was careless with my cactus and was watering it extremely rarely. One day I decided I should take a proper care of it and this is the result So, the bases of the cacti shrink and turn green-yellow-...
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Cactus id: Echinopsis aurea?

I have two specimens and I am trying to positively identify them. So far, I am thinking both are varieties of Echinopsis(Lobivia) aurea. I am far from sure though. So, am I any close with my guess? ...
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2answers
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Should I repot my mammillaria cactus?

I have this mammillaria hahniana: I'm considering repotting to another container, which is more beautiful, more stable, wider and shallower. You don't see it but there is a drainage hole. Here it is: ...
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4answers
456 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 ...
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What type of soil do cacti prefer? (acidic or alkaline)

I have done some research and found some sites suggesting alkaline soil while others say that alkaline soil will inhibit the growth of a cactus.
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Strange buds/growths on my cactus

When I purchased one of my cacti in mid-December (not identified yet), I noticed that it had some buds on its sides. I've never seen cactus flowers or buds, but that's what they seemed to be, ...
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1answer
274 views

What is this columnar cactus?

I am trying to identify my cactus that I planted when I xeriscaped last year. I never saved the little stick thing. I thought it was just a saguaro variation, but then it popped out all these red ...
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Centering Opuntia Cactus

I originally cut some Opuntia pads I got from a seller into half and planted them in the centre of pots. Unfortunately, they seem to be growing on one side only and I fear they will get too heavy and ...
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Why does my cactus have a weird white coating? What type of disease is it?

My cactus used to have white little rod like insects on it, and when I put some insecticide (added by liquid to the soil around it), the insects disappeared and it grew this weird coating, as shown in ...
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1answer
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Why is my cactus turning purple and pale?

Ever since I got this cactus it has been growing, but now it's becoming purple and paler. What am I doing wrong, and how do I solve it? I'm rather new at this gardening stuff so help would really be ...
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1answer
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Black material eating away at cactus

I'm not sure what kind of cactus I have, but there seems to be some sort of black material on the side of it. What is it and what can I do to remedy it?
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My cactus is turning brown on top. Is this usual?

I've just bought this cactus and it's turning brown. I'm wondering if it's because I watered it too much or because of the changing weather? (We rarely have cold days here and it's started to get cold ...
6
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1answer
389 views

What is this flowering succulent?

I just moved into this house and there are a few random potted plants left over from the previous tenants. I live in Perth, Western Australia. I recently gave this one some water since it didn't look ...
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2answers
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What's happening to my cactus? Why is the base of the cactus drying?

The base of my cactus seems to be drying. I water it once a week. I bought it 3mos. ago. Just recently, I have seen some whitening at the base of the cactus. It was small at first but it grows bigger ...
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At what age will a night flowering cereus begin to flower?

I have a night flowering cereus cactus 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?
6
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1answer
112 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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2answers
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Rats like to eat cactus?

Rats like to eat cactus? I have noticed that my cactus has become increasingly gnawed, and I have no idea what can be. I'm starting to take care of gardens recently and do not know much about it.
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441 views

What is this cactus with smooth round spineless stems?

Does anyone know the name of this plant? I have been searching everywhere for its name, but failed terribly.
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1answer
760 views

What are these potted plants with thin stems and leaves that look like sticks?

My mom gave me cuttings of this plant. She didn't know what it was but it seemed to do alright outside in the shade in Houston. What is it? Click on pictures for closer view.
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What are these insects in my potted Schlumbergera?

I have little insects in pot with Schlumbergera. They are crawling in soil, and occasionally on the pot (it's yellow plastic). I don't see them on plant itself. They are not really in big numbers or ...
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How to grow a new Opuntia (prickly pear) from a cutting?

I cut this pad which grew this summer from my Opuntia and I want to make a new one. I know I have to let it dry for some time before planting it, so that the wound can heal. For now I just left it on ...
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314 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 ...
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1answer
382 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!
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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?
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106 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.
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1answer
92 views

Can someone please ID this succulent

Can someone please ID the succulent seen in the image below:
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1answer
152 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 ...
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2answers
941 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.
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1answer
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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 ...
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1answer
212 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 ...
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1answer
332 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 ...
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1answer
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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 ...
7
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1answer
613 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 ...
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1answer
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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 ...
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1answer
548 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 ...
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1answer
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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 ...
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3answers
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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
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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 ...
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3answers
125 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 :)
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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 ...
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1answer
347 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 ...
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3answers
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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 ...
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1answer
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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.
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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 ...
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1answer
119 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
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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 ...