Questions tagged [cactus]

Member of the family Cactaceae. Desert succulents.

33 questions with no upvoted or accepted answers
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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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2answers
6k views

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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1k 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 ...
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0answers
71 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
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1answer
610 views

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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0answers
523 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 ...
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0answers
724 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?
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0answers
13 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 ...
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0answers
30 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
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1answer
45 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 ...
2
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0answers
57 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 ...
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0answers
55 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 ...
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1answer
99 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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0answers
210 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 ...
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0answers
13 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 ...
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22 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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27 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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0answers
12 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 ...
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0answers
32 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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0answers
30 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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0answers
29 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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0answers
24 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
40 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
34 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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0answers
38 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 ...
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0answers
303 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 ...
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46 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
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86 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?
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19 views

Cactus with white feathery spines?

Is this some variety of feather cactus or it is Old Lady Cactus?
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1answer
43 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 ...
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24 views

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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20 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 ...
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82 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?