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 is my cactus purple at the bottom?

I recently got this cactus and I noticed that the bottom is purple. Should I be worried? Is there anything I can do about it?
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Identify this cactus I received as a gift

I got this cactus as a gift. Please help me identify it. It's pretty weird. It's like they've glued some glitter on a plant :) Here's a photo of a dead leaf: edit: I was able to peel off the ...
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How do I plant the arms of a fallen saguaro cactus?

I have a 32' tall Saguaro cactus in my backyard that fell down 1 week ago. I was hoping to save and replant some of the undamaged arms that are still attached to the main trunk. The arms range in ...
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Orange mould in cactus soil?

I’ve noticed some orange-ish spots in the soil of my cactus plants which I am guessing is mould? I’m new to owning plants so I don’t really know what I’m supposed to do in terms of treating and ...
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What other cactus can I plant in the same box with my FairyCastle Cactus?

I’m planning on planting my fairy cactus in a new box but I’d like to also plant a second cactus with it, I really want to get a lady finger cactus but I don’t know what cacti are plantable next to my ...
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What is this on my false Christmas cactus?

Well, I've been trying to figure out what this strange white cotton, fungus looking thing is, it seems to be a part of the dirt maybe? and I've been looking at some posts but I don't know myself if ...
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What is this white stuff on my cactus and how do I get rid of it?

What is this white stuff on my cactus and how do I get rid of it?
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Cactus tip breakdown

I just bought a trichocereus top cut from a distant source in Australia’s. Arrived looking in a good state and is happily rooting (arrives with a single root, now 6); haven’t watered as yet. Noticed ...
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Indoor cactus during winter - switch growing/dormant seasons?

I have a small decorative cactus (exact species unknown, but I'll attach a picture) and one west-facing window next to both the air conditioner and the heater. I have no other windows. I have no ...
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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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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. Update: You are right, the growth was a flower. And it ...
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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’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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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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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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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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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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1 answer
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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 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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2 answers
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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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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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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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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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1 answer
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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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1 answer
143 views

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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2 votes
1 answer
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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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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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1 vote
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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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1 vote
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249 views

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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1 answer
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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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3 votes
1 answer
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My Cactus has developed an amazing droop - Why?

This cactus is at least 40 years old
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4 votes
0 answers
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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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4 votes
2 answers
518 views

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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5 votes
1 answer
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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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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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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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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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1 vote
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Pollinating dragon fruit in broad daylight

Most tutorials on pollinating dragon fruit say that the flower will open past midnight. They suggest to go out with a flashlight and use a paintbrush to pollinate it. If I don’t want to screw up my ...
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Back to basics - nutrients and growth

I have started out my journey of growing things with strawberries and cacti. But I feel I miss some of the basics of how the growth cycle works. So I have a few questions. First of all, the plants ...
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Why is my cactus turning brown and getting crusty stuff on it?

[![brown base getting bigger ][1]][1]browning cactus- crusty near crown I have had these for about 5 or so years. I noticed the brown near the bottom for quite some time but thought it was normal. ...
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2 votes
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What are these yellow spots on my Melocactus concinnus?

I purchased this Melocactus concinnus online a couple of months ago. I don't remember seeing those yellow spots on the bottom half of the cactus. It's possible, however, that I just didn't pay close ...
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1 vote
1 answer
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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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What’s wrong with my cacti

My cacti look very ill, and I don’t understand what I am doing wrong and what’s going on. Could someone please help me with advice of what to do?
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2 votes
1 answer
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Need help identifying this succulent (I think?)

My grandma had started growing this for me awhile back and passed away in January before I could get much info on it... any ideas?
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1 vote
1 answer
122 views

Part of cactus turned brown and shriveled

I've had a cactus since December, which is placed next to a Northern facing window. I've only watered it a handful of times since then. It has a small piece near the top which about 2 weeks ago turned ...
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