Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents.

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0answers
24 views

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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1answer
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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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1answer
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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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1answer
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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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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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1answer
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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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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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1answer
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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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1answer
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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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1answer
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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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1answer
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Why is my cactus’ arms growing skinny like this?

The arms of my cactus are growing skinnier and I don’t know how to make it grow and appear like the original arm (lower part of the arm). It’s skinnier and has a lighter green color than the loser ...
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What’s going on with my cactus

My cactus has started to to yellow, it was left in the greenhouse over winter in its normal
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1answer
28 views

I need help identifying this cactus

I've had a bigger version of this cactus for 4 yrs now and it's about 1 meter high With very small scattered spines and has bloomed 2 times with massive pale pink flowers that open once at night and i ...
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1answer
48 views

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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White spot on cactus? Can someone help identify and find a fix?

I’ve had this problem for a little while, maybe a month? I haven’t noticed any spraying but I am worried about his health over all. He’s indoor and was in natural light when this began and is now ...
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Deteriorating Cactus

My cactus is showing signs which might be detrimental to its health. This is an image of the cactus The base of the cactus has a white coloration but is still firm( I don't think its a sign of rot) ...
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What is this white tuber on my cactus?

Yesterday I noticed that my cactus had a white tuber type thing growing out of it. Is this normal? It's almost doubled in length in the past 36 hours.
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Huge fungi in the cactus pot

A year ago or so, my cactus started developing yellow spots all over and was diagnosed with a fungal infection. As instructed, I got an antifungal spray (copper-based) and was spraying it once a week ...
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Please help me identify my cactus

Please help me identify my cactus :) It is about 20 years old at about 3 feet tall. It has 6-7 ribs near the top that fill out towards the middle and bottom. Here are some more closeup pictures ...
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Can someone help me diagnose what is wrong with my cactus and how do I treat it?

Does anyone know what is happening to my cactus. It was a beautiful specimen when I got it and was fine for a year or so, but then it gradually started with the browning and weird skin disease. It ...
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My cactus is suddenly becoming white and shrinking

Can anyone suggest what could be the problem. I am keeping this in under a shed and watering when the top of the soil is dry. Is it a bug or rot root problem ? !
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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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Austrocylindropuntia subulata breaking off

I've had this one for about 3-4 years - found a piece of if on the ground broken off from the big plant and potted it, and it kept growing since (in the same pot all this time). Few days ago, one of ...
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Cactus with white feathery spines?

Is this some variety of feather cactus or it is Old Lady Cactus?
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1answer
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Cactus with pink spines at top?

Received this cactus and couldn't find it online what cactus this is. Care tips would be nice. Location: New Delhi Pot size is 4"
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Can one have cacti and non-cactus plants in the same pot?

I have these 3 small cacti which are getting too big for their pot. I was thinking of replanting them together with this larger plant. Would that be possible to have cacti and a non-cactus plant ...
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1answer
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What exactly is a gritty mix for succulents?

I have seen very few gardeners (online) use gritty mix for succulents. Here are two of them: Gritty Mix another different gritty mix Both of them talk about gritty mix and to me gritty mix makes ...
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1answer
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Monkey Tail Cactus Burned under lights do I have to move it?

My Monkey Tail Cactus hangs down really low, so I have to raise it up to keep it from touching the ground. When I raise it up it gets closer to the grow light. The last time I raised it up I burned ...
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1answer
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Cactus turning yellow and shriveling from bottom to top

I have a cactus that turning yellow and shriveling from bottom to top, as Following pictures: The cactus age is about 20 years old. What is the problem? What should I do?
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Gritty mix for cactus and succulents usage

I am seeing some gritty mixes for succulents and I cannot find any info on the product regarding it usage.. Will succulents or cactus do well if they are placed in those gritty mixes? Here are gritty ...
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3answers
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Pumice or perlite for succulents?

Is pumice better for cactus and succulent mix and such than perlite? Is it all about the chunks? I am thinking of making my own soil mix for succulents and cactus and other plants like jade plants ...
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2answers
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Do all desert cacti need a rest period?

Assuming a desert cactus could get all of its needs, light, heat, water... during the growing season met year round, does this cactus need a rest/dormancy period to remain healthy? Flowering does not ...
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1answer
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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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1answer
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What type of cacti is this?

I would like to know what variety of cactus this is. It has grown three times its height since I bought it and although I have looked on many websites, I just cannot seem to find anything like it.
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1answer
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I don’t know what’s happening to my opuntia, can you help me?

I've had this opuntia since may this year and it was growing fine, it had grown three new little opuntia and suddenly it started having this white rod like things, at first I cleaned them up but a ...
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1answer
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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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2answers
76 views

The growth on my cacti has changed, and it wierd

I asked a question about the growth on my cacti earlier in the summer, however it's just acting weird. I initially thought it was a cacti fruit because it originated from a flower I tried to cross ...
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1answer
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Please ID this cactus species

The label that was in the pot when I got it identified the genus as espostoa. Is it possible to tell what species it is? If not, does it even matter? I'm trying to figure out the name of the species ...
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1answer
51 views

Cactus looks weird

Hello, my cactus is turning brown and whiteish at the base. It is not exactly softer at the base compared to the rest of the cactus. Not sure if this is root rot or something else. Does anyone have ...
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What wrong with my cactus

Ive had this cactus which i think is a Pachycereus Schotti/Monstrosus since years and its been growing fabulous. Ive just recently noticed it acquired some brown scales (non Insect) and looks like ...
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Maintain cactus without soil?

I have several cacti plants (sabila), just like the one in the picture, and I have several cut wine bottles. I would like to place several of them around our balcony, but without using soil. My ...
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1answer
149 views

Why is my cactus yellowing and dying?

My cactus has been grown from seed and has lived about five years. Over the past several months it has turned yellow- I read that it may be a case of root rot/overwatering so I’ve not watered it in ...
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1answer
69 views

Fairy castle cactus

My cactus has been suffering for 3 days, and now it look very sick. Could someone tell me the cause for which it looks like this and how I take care of him? Thank you very much!
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1answer
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Can cactus live in water permanently?

I have many small sabilas (a cactus), so my idea was to cut the top part of several wine bottles, fill the remaining glass container with water, and place the cactus in the bottle, like in the picture ...
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1answer
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Help identifying this weird cactus

got this cactus from a roadside seller. Didn't catch the name, and having trouble finding it online. The needles are very flexible and paper-like. Let me know if you have any info!
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How long can plants survive without light?

For context I'm moving house and shipping most of my stuff. Shipping is expected to take 1-2 weeks. I want to know if shipping my house plants is worth considering. I have a bunch of cacti and ...

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