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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Why does my cactus have a bald spot? And any idea what type of cacti this is?

Cacti, unsure what type... balding in one spot but rest of hairs seem healthy, any idea why?
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Help with Arizona cacti

Hey everyone! I’ve recently been placed in charge of caring for this Arizona native cacti. A friend of mine is travelling abroad for 8 months and I want to take good care of this little guy while she’...
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How much soil needed for cactus maintenance?

I have several Sabila cactuses that look like the picture below. I was considering filling up a cut wine bottle like this with soil and using it as a pot for the cactus. Is this possible or do they ...
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Weird spots on my cactus

My cactus has significantly grown over the past few weeks and iv noticed these weird spots on it, it’s spreading around it. Dose anyone know what it could be or how to treat it?
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Green cactus identification

What is the name of this cactus? I'm planning to replant it and want to do it properly accordingly to its species.
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Echinopsis multiplex is getting brown and soft in the bottom. It also has developed a hairy growth on one side

I have been watering the cactus once a week. The bottom has got really soft and mushy. The cactus also has hairy growth on the top for a month.
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Some Pads Turning Yellow on 35 yo Opuntia engelmanii — Is this a problem?

There are two large, about 35 yo Opuntia engelmanii in my yard in Phoenix Arizona USA. Both recently flowered extensively and the fruits are now maturing. I've lived here about 6 months. There is ...
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What are those brown / white spots on my cactus?

There are 3 of this same cactus sharing the pot. Only one of them is getting these spots. What could it be? Fungus? Sun burn? They are in my balcony, they don't get rain, and they get like 3-4 hours ...
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care for a thinning cactus

My cactus is growing very thin. I was left unattended for a month without sun and water. What should i do to bring it back to the way it was?
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My cactus is growing very thin

[![]my cactus is growivery thing. It was left unattended for a month without proper sunlight or water. I want to know how i can save it. Please help me. Sharing some pictures below.2]2 It used to look ...
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What’s wrong with my cactus?

My cactus has been like this with cracked skin for months, I then noticed it had aphids and removed them with soap and water for one week and they went away, and just today I noticed these brown spots ...
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How to get get pups or divide this overgrown aloe vera plant?

I have a very large aloe vera plant. I cannot see any pups/babies. Is there a way I can divide it into more pots, either so the original isn't as big or just just to have more aloe vera plants? It's ...
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What are these brown spots on my cactus?

My cactus has this brown areas growing across the surface since a week ago. If you try to remove them, they are like a hard skin that comes off, the surface underneath is normal green color but ...
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Can I revive my poor cactus?

My poor cactus was under-watered and I accidentally left it outside during the Big Southern Freeze in February. I had forgotten all about it when I was freezing my butt off in my house. I feel awful ...
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How should I proceed with this cacti

I have one cactus for about 5 years now, and since then it grew from about 3 cm to considerable size. I am watering it every 20 days and it is not exposed to direct sunlight. But I was always puzzled ...
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Is this cactus being overwatered, underwatered or ill?

Can anyone please tell me what’s up my with my cactus? Is it being underwatered, overwatered or disease? Or could it be cold? Thank you very much!
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Cacti turning brown at bottom

I have had both these mini cacti for a bit more than a year, and both are having different kinds of brown discoloration at the bottom. The first cacti has a yellow-brown-greenish discoloration at the ...
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What are these white spots on my cactus? Note: they are not cochineal bugs (as I know them)

I've had this cactus for about two years now, and this winter in began showing these white, flat dots that look like splattered paint. They can be scrapped off, but there's no sign of an insect or ...
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What to do about the Collapsed Branch on my Cactus (possibly Austrocylindropuntia subulata)

I have what an app has identified as Austrocylindropuntia subulata. I've had it for about 25 years, although my mum has always looked after it. It's grown from about an inch high to almost six feet ...
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1answer
11k views

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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Cactus dying from insufficient light?

I left the country for two and a half months and left my cactus in the care of a friend. When I came back, apparently he had been leaving it under a desk lamp and not by the window to get enough ...
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Cactus growing white hard coating

One of my cactuses has been gradually growing a white coating, and the lower outgrowths seem to be shrivelling up and fading, I first noticed this about a year ago and it hasn't stopped no matter what ...
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35+ year old cactus turning yellow

Hello fellow plant lovers! I've adopted this beautiful 35+ year old cactus from a friend moving across the country, however I'm concerned with the yellowing you see here in the pictures. The ...
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Should I re-pot my cacti if they're starting to touch each other?

I have 4 spiny cacti in one flowerpot and after few years one of them is starting to grow more side-wards and getting closer to the other cacti (spines are already touching). I'm just wondering if it'...
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What are these yellow splotches on some Christmas Cacti (Schlumbergera) I rescued? Are they a positive or negative sign?

A few weeks back — on a fairly windy night here in New York City — I was going out to toss out the trash when someone’s small pot of Christmas Cacti (Schlumbergera) crashed down on the ground right ...
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Identify a light green columnar cactus

I bought a Cactus from the local garden center. Unfortunately the guy that I bought the plants from was a novice so he didn't know the plant's name. Can you tell me its name plus some advice about ...
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Cactus(Astrophytum) seedlings weather requirements

I live in Kerala, India, where the weather is humid dry. The temperature ranges from around 26 at night to 33 on daytime. My Astrohpytum seedlings are growing. They're 1.5 months old now. My questions ...
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What is the cause of this white scaling on my cactus?

I’m not sure what type of cactus this is, but I’ve had it about a year and since getting it I’ve moved it into a pot with drainage. I’m careful with watering and do so about every 45 days as that’s ...
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102 views

Old cactus Browning at base

I have a 25 year old cactus that is Browning at the base it is not soft to touch it is hard. It does have new growth andit is spiny at the very top. Please help I do not want to lose him!
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Is my cactus infested with mealy bugs?

I have had this cactus for about 5 (or more) years, and have been treating it pretty shamefully due to me only recently researching how to garden and unfortunately being one of those who didn't care ...
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Browning at base of my cactus

I have had this cactus for a while now (about 4 or 5 years) and recently noticed browning near the base. The spines at the bottom are also a different color and pressed closer to the body of the ...
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Top of San Pedro cactus broke off…

I just found out that a cactus I was given is a San Pedro cactus. I have had it for three years on my screen porch and it has tripled in height. Recently I found it tipped over with the top 11” broken ...
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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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Identifying plant species (cactus)

I would be grateful if someone could help me with identifying this cacti I bought. I did some research and concluded it could be Pilosocereus chrysostele. But I am not really sure as there are some ...
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Browning cactus. Cut and repot or wait?

Not sure what type of cactus this is, but it was a grocery store purchase from 2 years ago and has been doing okay until the past 6 months. It sits in a western facing window with about 7 hours of ...
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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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Why are there brown spots developing on my Coral Cactus?

I have had my Coral Cactus for approx 4 years. Noticed brown spots developing on the fan part of cactus..never noticed this before. I am wondering what is the cause and what I can do to fix it
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Cactus growing in a stem between two leaves?

Question 1: What plant is this... a cactus growing in a stem between two leaves...? Never saw that at stores, I think! It got so heavy that it started falling, I'm keeping it up straight with the help ...
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What's wrong with my fairy castle cactus?

My cactus used to be really thick and dark green but now it's so much skinnier and starting to shrivel up. Some of the arms are turning a dusty kind of brown and they're all leaning away from the stem ...
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1answer
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Prickly pear cactus needs help

Hi all, I recently moved into a rental with this mature, potted prickly pear out front. While it didn’t look great at move in, it has definitely gotten worse in the last couple of weeks, with more ...
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1answer
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Why is my bristle bush learning

I cant seem to do anything with this. I tried to add a pic. It was sideways. Then it says I had to have words here. Well that removed my pic then the heading was too long. I just repotted and in did ...
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1answer
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My Cactus has developed an amazing droop - Why?

This cactus is at least 40 years old
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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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Unidentified euphorbia turning yellow, how can i rescue it?

This is my first post and I have been looking on several forums where I can discuss plant queries. I have a couple of questions regarding a euphorbia cactus so please bear with me. I recently ...
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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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Which species of Cactus is this and can I eat the fruit?

This delicious plant is looking at me and asking me to eat it. May I do so? And how do I know if the fruit are ripe? And will I be enormously injured if I accidentally touch a needle?
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Discoloration of cactus: Fungi or Mite?

I’ve been caring for this cactus for about 3 years now, and it seems happy based on the amount of growth. Recently (about 2 months ago) I started to notice a discoloration/change to the outside of the ...
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Germinating succulent seeds

First a little background, I live in Sri Lanka where the temperature is at about 30c throughout the year. The sun is also very strong for the entire year and yeah we don't have different seasons here....
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1answer
143 views

Why is my cactus limping?

Not sure why it's been limping, the baby one also started limping and died recently. The bottom is a bit yellow but not rotten yet. Not sure how to care for it not that it's so tall
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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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