Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents.

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1answer
16 views

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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94 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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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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1answer
46 views

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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17 views

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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20 views

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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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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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
50 views

My Cactus has developed an amazing droop - Why?

This cactus is at least 40 years old
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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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1answer
81 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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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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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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28 views

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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54 views

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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52 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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1answer
181 views

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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31 views

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
31 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
97 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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33 views

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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2answers
48 views

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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2answers
103 views

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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32 views

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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31 views

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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26 views

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
53 views

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
57 views

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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20 views

Cactus with white feathery spines?

Is this some variety of feather cactus or it is Old Lady Cactus?
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1answer
61 views

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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2answers
54 views

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
63 views

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
83 views

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
104 views

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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2answers
232 views

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
51 views

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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