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.

45 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5
votes
0answers
2k views

Can my lemons grow in cactus soil mix

I bought cactus soil mix the other day from Calloway's for some plants. I then decided to grow lemons. So I did the whole deal. 2 weeks later I have lemon sprouts. I was wondering if I could use ...
4
votes
0answers
168 views

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 ...
4
votes
0answers
610 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 ...
4
votes
0answers
76 views

Cactus id: Echinopsis aurea?

I have two specimens and I am trying to positively identify them. So far, I am thinking both are varieties of Echinopsis(Lobivia) aurea. I am far from sure though. So, am I any close with my guess? ...
3
votes
0answers
22 views

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?
3
votes
0answers
17 views

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?
3
votes
0answers
25 views

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.
3
votes
0answers
23 views

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 ...
3
votes
0answers
44 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 ...
3
votes
0answers
77 views

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 ...
3
votes
0answers
292 views

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 ...
3
votes
0answers
852 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?
2
votes
0answers
33 views

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 ...
2
votes
0answers
16 views

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 ...
2
votes
0answers
28 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 ...
2
votes
0answers
28 views

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 ...
2
votes
0answers
30 views

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 ...
2
votes
0answers
33 views

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?
2
votes
1answer
76 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’...
2
votes
0answers
138 views

Yellow spots on cactus, brown spines

I have a cactus in which some yellow spots are appearing, some are starting to turn brown even. Then the spines seem to be dark brown on the top and white on the sides. Not sure if that's normal. I ...
1
vote
1answer
26 views

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 ...
1
vote
0answers
37 views

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 ...
1
vote
0answers
74 views

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 ...
1
vote
0answers
20 views

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 ...
1
vote
0answers
26 views

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 ...
1
vote
1answer
61 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 ...
1
vote
0answers
22 views

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 ...
1
vote
0answers
139 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
1
vote
0answers
19 views

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 ...
1
vote
0answers
120 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. ...
1
vote
0answers
33 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
1
vote
0answers
18 views

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 ...
1
vote
0answers
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) ...
1
vote
0answers
46 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 ...
1
vote
0answers
33 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 ...
1
vote
0answers
30 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 ? !
1
vote
0answers
41 views

Cactus id (Polaskia?)

I have a cactus here (9 cm tall), and I think it is Polaskia chichipe, however it might be P. chende as well. I don't know how to tell difference. It might as well not be Polaskia at all. Can someone ...
1
vote
0answers
466 views

Why is my cactus losing spikes?

So basically i recently got this cactus as a gift. (And is the 1st time owning one) i keep it in sunlight, water it ever 1-2 weeks depending on how dry the soil is, and i keep it in a pot with holes ...
1
vote
0answers
55 views

I don’t know what’s happening with my cacti it had brown spots on it and it happens a week ago I think

so I don’t know what’s wrong with my cacti
1
vote
0answers
125 views

Small succulent (cactus?) identification

I got this cactus from a friend, but I am not sure if it is really a cactus. It could also be a succulent other than cacti. Does anyone know what species this is?
0
votes
1answer
13 views

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?
0
votes
0answers
29 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 ...
0
votes
1answer
63 views

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 ...
0
votes
0answers
24 views

Epiphytic(?) Cactus Identification Needed

Epiphtye-like cactus Got it while picking up a Moonglow graptoveria at a local greenhouse. This sad little epiphytic guy looked way out of place among the golden barrel seedlings. Unfortunately there ...
0
votes
0answers
135 views

What should I do next to take care of this cactus which I grafted two years ago?

Two years ago I succeeded in this grafting. I would like to know how long you think it will resist the cactus feeding the graft and what to do next?