|
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
|
psilodot
Stranger
Registered: 04/09/15
Posts: 3
Last seen: 9 years, 1 month
|
White spots on San Pedro cactus 1
#21523811 - 04/09/15 11:53 AM (9 years, 1 month ago) |
|
|
Hi guys! So, I just noticed that my San Pedro cactus has gotten a few white spots lately, which has made me a bit worried. Do anyone of you know what the issue could be (if there is an issue at all)?
The spots are not fuzzy at all, and they seem to be a part of the outer skin (but got a harder surface). I thought that it could be sunburn, but it's weird that they occur at the "valleys" and not the "ridges" of the cactus, and mainly at the lower parts close to the base.
It has been grown indoors in a window, in the northern part of the world, if that makes any difference.
Here's some pictures:



Thanks in advance!
|
Mostly_Harmless
wyrd bið ful aræd



Registered: 05/12/09
Posts: 5,043
Loc: Perfidious Albion
|
Re: White spots on San Pedro cactus [Re: psilodot] 1
#21523963 - 04/09/15 12:37 PM (9 years, 1 month ago) |
|
|
Hi psilodot, welcome to the Shroomery! 
The cactus certainly looks stressed in some way. Sunburn in some way could be involved. It looks to have been grown in decreasing light conditions? Has it tried to grow through winter?
|
psilodot
Stranger
Registered: 04/09/15
Posts: 3
Last seen: 9 years, 1 month
|
|
Quote:
Mostly_Harmless said: Hi psilodot, welcome to the Shroomery! 
The cactus certainly looks stressed in some way. Sunburn in some way could be involved. It looks to have been grown in decreasing light conditions? Has it tried to grow through winter?
Why, thank you! 
You are right - I planted the cutting in August, which I guess was not exactly ideal for it. I've been giving it water roughly once a month, but I'm planning on increasing this now to 2-4 times a month.
Do you have any recommendations on how I can make it a bit happier? I haven't changed the soil or added any nutrients since October.
|
Mostly_Harmless
wyrd bið ful aræd



Registered: 05/12/09
Posts: 5,043
Loc: Perfidious Albion
|
Re: White spots on San Pedro cactus [Re: psilodot] 1
#21524120 - 04/09/15 01:17 PM (9 years, 1 month ago) |
|
|
Through winter, they don't need watering at all really. If kept cool enough, they go dormant, and won't attempt to grow whilst there is insufficient light. When they try to grow in low light, the growth is thin and weak, and won't always fill out again when stronger light returns.
Was there already roots? What is your soil mix?
|
psilodot
Stranger
Registered: 04/09/15
Posts: 3
Last seen: 9 years, 1 month
|
|
Quote:
Mostly_Harmless said: Through winter, they don't need watering at all really. If kept cool enough, they go dormant, and won't attempt to grow whilst there is insufficient light. When they try to grow in low light, the growth is thin and weak, and won't always fill out again when stronger light returns.
Was there already roots? What is your soil mix?
Ah, I see - seems that I should've read more about the growing process. But since winter is pretty much over, I guess its OK to just keep watering once a month, and then water more frequently once the summer has arrived?
There was roots when I replanted it in October, although not very many. I'm guessing the roots are not well developed even now, since the cactus is a bit wobbly when poked. Seems to have gotten a bit steadier lately though (I imagine, at least).
The soil mix I used was, according to the bag, aimed towards cactuses, succulents and cuttings, containing sand and a small amount of fertilizer.
Thanks for the help by the way - you're the man
|
Mostly_Harmless
wyrd bið ful aræd



Registered: 05/12/09
Posts: 5,043
Loc: Perfidious Albion
|
Re: White spots on San Pedro cactus [Re: psilodot] 1
#21527669 - 04/10/15 07:47 AM (9 years, 1 month ago) |
|
|
It is safest to water when dry, until you gain more experience with specific plants in your climate. With a more open mix, improved drainage, you can water with greater frequency.
Store bought compost would usually be amended with potting grit, perlite, something of the sort, to increase drainage and aeration, which is extra important for healthy cacti. Some trichs are more tolerant of overwatering though, so should be fine.
Keep in lower light levels and slowly introduce to stronger light and then the sunburn shouldn't progress.
|
|