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Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents.

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Repot dragon fruit in a definitive pot

I planted these cuttings two months ago and I have a lot of questions. Is it time for repotting? I have 26 liters pots. Is it enough? Can I plant more than one in the same pot? What kind of soil ...
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1answer
40 views

What is happening to my Agave attenuata

I have owned the depicted Agave attenuata since about half a year. It was outside until early November when local temperatures became too cold. Now it resides in in a light, moderately heated room. (...
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2answers
65 views

Cactus Identification? Are the buds real?

My friend brought me a little cactus from a plant sale. Unfortunately I don't have a clue about cacti and was wondering if someone could tell me what the little orange buds are? Are they real? I can't ...
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43 views

Cactus shoots drooping and turning olive

Hey Gardening & Landscaping SE, happy to be a new member! I am concerned for my cactus shoots and hope you are willing to help me out. Short version: My 3,5 months old cactus shoots are starting ...
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Young cactus identification

I bought another small cactus today, the sellers in the store were not sure what species it is. My guess is that it is from the genus Pilocereus, but it is a wild guess. The height is about 7-8 cm (3 ...
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1answer
51 views

Why is the bottom of my cactus discolored and soft?

I got this cactus a couple of years ago but in the last few months I have noticed the bottom half getting brownish and soft. I water the cactus about once every 6-8 days and it gets a lot of direct ...
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0answers
57 views

Strange plant or weed? [closed]

This decided to grow in with my Christmas cactus! What is it? I have had the cactus for years. Needed to add potting soil to it, and I think that's where this came from.
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1answer
58 views

San Pedro tipped over and broke

My San Pedro has been growing quite a lot the past 2 years, but very thin. It was windy the other day and found him tipped over. Not completely broke in half, only half way. So I tipped him back right ...
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3answers
93 views

What kind of cactus is this?

I just bought this plant but I am now realizing that I have no idea what it is, so looking up care tips is much more difficult than anticipated. Would you be able to help me identify it?
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1answer
59 views

Is my cactus dying? Or what is this?

So I just bought this cactus two weeks ago. First cactus or plant I’ve ever had. When I got it the plant was dry af. So I watered it a little bit and every 2 days or so I put it on the window sill ...
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1answer
72 views

What kind of cactus is this and why are these black bumps forming on it?

Little burnt-looking bumps have been popping up on this cactus and I'm not too sure what to do about it. Can you help me figure it out?
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2answers
51 views

Help identifying a cactus

I got this cactus as a gift. Can somebody please identify what it is? Thank you.
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1answer
65 views

What is wrong with my cactus?

I'm hoping someone can help me but I'm afraid it's too late. I've had a cactus for about 3 years and he suddenly started losing color, turning brown, and getting a little droopy (see pictures) a few ...
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1answer
31 views

Soil condition for catus seedling

I have a cactus seedling (Pachycereus pringlei), it is one month old now (germinated end of August). During this time I kept the soil very moist and wet. My question is when do I switch to normal ...
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2answers
70 views

Cactus spines turning yellow?

I'm a first time cactus owner. My flatmate is watering it while I'm out on long holiday, and she sent me a picture showing that the spines are yellowing. I've read this can be a sign of old age, but ...
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2answers
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Advice on LED light periods for cactus

I want to grow large cacti, see my previous question. So I start with small plants and to keep them growing in winter time I want to give them LED (special grow) light. I was wondering about the best ...
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1answer
34 views

Ants visiting Opuntia

My (elderly) Opuntia gets regular visits from a few ants, which apparently like to draw liquid where its cactus spines emerge. For this relationship between species, do we know whether it is a ...
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1answer
70 views

Small cactus from garden center identification

I bought a small cactus from the garden center, but it doesn't say which species it is. Can anyone identify this cactus? For reference I put it next to a coin of about 3 cm (1.2 inch) in diameter. ...
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1answer
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Agave is sweating

It looks as if my agave is "sweating" a crystalline substance. The droplets are approx. 2 mm in diameter and twice as long. Is this as it should be (also the surrounding yellowish patch in the ...
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2answers
106 views

Various Questions About Fairy Castle Cactus

I have a few questions about my Fairy Castle Cactus. It’s barely grown since I bought it, in contrast to my other plants. I’ve read conflicting info about the amount of light it likes. I’m using the ...
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0answers
128 views

Dark spots on cactus?

My elderly relative has asked me to do a research on her cactus which has recently got these dark spots: I poked them and they are dry and hard when you touch them. There is no liquid or mush. They ...
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1answer
73 views

Watering huge cactus

In the question big-cactus-identification-and-how-long-does-it-take b.nota gives us a nice photo of big cactus. The second thing that struck me was how the soil level is about 0.00000001 inches from ...
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1answer
426 views

Big cactus identification and how long does it take?

I found these huge cacti in a garden-center, the two on the right. The largest in the back was over 1.5 m in length! They were a little bit too expensive, so I thought maybe start from seed... What ...
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1answer
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Cactus is becoming brown from the bottom

I bought this cactus recently from farmer's market and it is becoming brown from the bottom. I have stopped watering it but is there anything else I can do to save it. It is kept outside in spot that ...
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2answers
132 views

Can I heal a 4 foot tall cactus after two arms were cut off?

A thief in the night cleanly amputated two arms off my 4 ft (1.2 m) tall cactus. What do I do?
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1answer
68 views

What's wrong with this cactus?

I have this cactus that is slightly wrinkly and soft at the bottom part. It sits on a window sill with all my other plants and receives around 5-7 hrs of direct sunlight every day. I water it once a ...
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1answer
57 views

Succulent turning yellow

My plant is suddenly turning yellow and I don't know what it wrong with it or if it is normal. I have it for about 4 month and this happened only this week. I don't know if it's related, but it has ...
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1answer
131 views

Cactus in hydroponics: Keep water levels up at all times?

I've read a bit online about growing cacti in hydroponics, and basically every site I found agrees that it's possible, and it should basically work like any other hydroponics: Set the plant (in an ...
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1answer
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Pilosocereus cacti, growed from seeds and a lot of mistakes

I made a terrible (i hope not that terrible) mistake when growing Pilosocereus pachycladus cacti from seed, i sowed them back in November. I know it's probably not the best idea to sow them right ...
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1answer
58 views

Please help to identify a cactus

I tried to identify this cactus in order to know how much water it needs. The closest I got with the identification is this, but I'm still not sure, the color is different: http://www.cactus-art.biz/...
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1answer
41 views

Is my cactus okey?

This is my first time posting thing here n honestly the only reason I'm signing up on this website is to find out on what the hek is wrong with my cactus. So please??? I had been searching on Google ...
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2answers
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Is this a aloe vera plant?

So I had this plant for around 1 year and lastly I was wondering if this is a Aloe vera plant? Kind of looks like it but I'm still unsure. If it's not that what is it?
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Is this white cottony stuff on my cactus normal?

This cactus was taken from my dad’s cactus garden before it was destroyed. It is very important that I keep it alive. I’m wondering if all this white cottony stuff on the top and the spikes is normal. ...
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2answers
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Cacti red/white discoloration

I’m growing these cacti for about 9months i just changed their soil and pot, while i was picking up the little babies is realised that some of them changed color to red (meaning too much sun i guess) ...
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1answer
210 views

Is my cactus dying?

I bought my cactus about one year ago. I was surprised that it grew very fast and I thought it's fine. But it looked too skinny and after some search on the internet I found out it didn't get enough ...
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1answer
365 views

Problems with fairy castles cactus

My beloved fairy castles cactus has been suffering for a while and I was wondering what could be happening now. It looks like having several different problems... specially worried as it looks ...
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2answers
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Cactus with a white “growth”

(There are a few other questions which may be related but I am not sure if this is a duplicate. (What is this white crust forming on my cactus during the growing months? , What is this white growth on ...
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2answers
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What's this cactus with tongue like leaves?

Saw this cactus while I was walking along the road in Whangarei which has a subtropical climate. It is growing over the fence into public air space so it would be legal for to take a cutting. And I ...
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2answers
444 views

Cactus turning white/brown/yellow

I believe this cactus is a cereus jamacaru but I am not 100% sure. I had it in relatively low light room but across from a south facing window in the sunniest spot of the room. I watered it once ...
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1answer
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White and brown spots on cacti

I've been away for the last two and a half weeks, and upon return I noticed a few of my cacti had developed white fuzzy spots, which were not there before. In the worst instance, one cactus appears ...
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2answers
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Help identify an insect on a cactus

I found this insect on my Echinopsis sp. It sort of looks like a tick, but what would a tick be doing on a cactus? What is it, and is it harmful?
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1answer
397 views

Cactus with brown and white spots. What is the problem?

My cactus has had this brown spot on its side for a couple weeks now and I don’t know how to fix it. I think it happened when I was away for a month and forgot to have someone care for it. The house ...
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0answers
292 views

What is wrong with my cactus? (Red spots)

Is it dying? There are these weird red marks, is this a fungal infection or sunburn?
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3answers
70 views

When is the winter period for plants kept in a country with no winter (or a constant room temperature)?

Reading up on how to care for a Mammillaria Elongata Cactus I see it mentions such things as suspending watering in winter for best care (and to encourage better flowering) the preferred time to re-...
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1answer
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Help is my cactus is dying, can it be saved

I recently bought a golden barrel cactus (about two months ago), judging by its size I would say the plant is about a year old. Everything has been perfect with it until Saturday. I usually water or ...
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2answers
679 views

Delosperma (Ice Plant) indoors during winter

I live in Canada and it will soon be time for me to bring in my succulents and cacti. Last year I brought in two Delosperma plants and within less then a month they both died. they were both very ...
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1answer
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What species cactus is this?

I have taken a cutting from a large cactus, and it seems to propagate well. I was wondering what species it is? Does anyone know? Thank you in advance.
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1answer
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Identify this dead cactus - like a cleistocactus strausii, but super-dwarf?

Can anybody identify this cactus? It appears to me to be something between mammillaria elongata and cleistocactus strausii - but small, each column at most a long finger, and narrower. It died some ...
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4answers
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Identity and give care instructions for mammillaria cactus

Hi, I think I just bought a mammillaria cactus. What is the subspecies and how do I care for it best? What colour flowers to expect? What should I do with the fruits sticking out (propagation ...
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2answers
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Are these 'fluffy' cacti healthy?

My wife and I have had these cacti for a little over a year now. Since change happens slowly I assume we never really noticed, but now it seems like it has gotten a lot more..fluffy.. for lack of a ...