Search found 497 matches
- Sun May 19, 2024 1:53 am
- Forum: Cultivation
- Topic: Fertilizers explained (2-part presentation) -- with 6/2023 update
- Replies: 180
- Views: 58738
Re: The role of nutrients in cacti and succulents
Did you happen to ask him about phosphorous binding with calcium (in all forms)? It's hard for me to ignore the clear organic chemistry basis: calcium (acetate, carbonate, etc) have all been shown to bond with phosphorous making each into a more slow release form the soil needs to break down. You s...
- Mon May 13, 2024 6:09 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Base of cactus turning brown.
- Replies: 5
- Views: 208
Re: Base of cactus turning brown.
Premature corcking, probably due to small watering. Notocactus ottonis origined from southern Brazil, Uruguay and Paraguay in grasslands where year precipitation in high enough that's why in collections plant usually suffer from excessive dryness. I have a Notocactus herteri outside. It gets tons o...
- Mon May 13, 2024 6:02 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Rot or Not? Please help
- Replies: 50
- Views: 7255
Re: Rot or Not? Please help
Urea has 46.7% N Ammonium sulphate has 21% N Calcium nitrate has 17% N Potassium nitrate has 13.8% N Ammonium nitrate has 35% N You can work out what you want from there. if you want to acidify or stop alkalization use more Ammonium and/or urea If you want to reduce acidity or stop it from falling, ...
- Mon May 13, 2024 12:42 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Base of cactus turning brown.
- Replies: 5
- Views: 208
Re: Base of cactus turning brown.
The beige areas around the base indicate premature corking, typical for mixes containing too much soil and organic material. Lean out the mix by adding mineral gravel -- pumice (the best if you can find it), granite gravel, or calcined clay granules. My default recommendation is a 50% soil/50% mine...
- Mon May 13, 2024 12:36 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Rot or Not? Please help
- Replies: 50
- Views: 7255
Re: Rot or Not? Please help
Btw - what role does urea nitrogen play and is ammoniacal superior because it removes one more step of conversion through hydrolysis? Urea can be taken up by plants directly and they use the enzyme urease to convert it to ammonium. Nickel is required in this process. Urea is also converted to ammon...
- Fri May 10, 2024 2:40 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Rot or Not? Please help
- Replies: 50
- Views: 7255
Re: Rot or Not? Please help
From [url=https://www.reddit.com/r/sanpedrocactus/comments/119f5ju/ However, in containers, it's harder for nitrifying bacteria to survive and it's best to do a little bit of the work for them and just feed directly with nitrate." That is incorrect. Nitrifying bacteria are perfectly able to su...
- Thu May 09, 2024 2:36 am
- Forum: Succulent Growing Help
- Topic: Question on conophytum dormancy
- Replies: 1
- Views: 125
Re: Question on conophytum dormancy
Conophytum is winter growing - summer dormant. They should look almost dead in summer. No water!
In autumn they shed their skin and become plump and green again. You can water then but not too much.
In autumn they shed their skin and become plump and green again. You can water then but not too much.
- Thu May 09, 2024 2:30 am
- Forum: General
- Topic: Echinopsis yellow spots advice
- Replies: 4
- Views: 171
Re: Echinopsis yellow spots advice
Looks fine as long as Ca and Mg are coming from somewhere...Steve Johnson wrote: ↑Wed May 08, 2024 5:17 am
Looks good to me. How about you, Mike? Dexter -- if Mike gives us the thumbs-up, go for it.
- Wed May 08, 2024 3:28 am
- Forum: General
- Topic: Echinopsis yellow spots advice
- Replies: 4
- Views: 171
Re: Echinopsis yellow spots advice
A few thoughts.. -50/50 perlite/cactus mix is very lean. These are heavy feeders. I would suggest a gravel, loam, organic mix for them with good drainage. They may be growing too slowly. -The organic part of the potting mix may have broken down too much and hold too much water and not enough air. pe...
- Wed May 01, 2024 6:30 am
- Forum: Cacti of the Month
- Topic: Turbinicarpus
- Replies: 52
- Views: 70043
- Wed May 01, 2024 6:26 am
- Forum: Sick Cacti - Pests, Diseases, etc.
- Topic: Fungal Infection or something else? (It's Chlorosis)
- Replies: 10
- Views: 3760
Re: Fungal Infection or something else? (It's Chlorosis)
It need nitrogen. If you cannot afford ferts at this time, use 1 part urine to 10 parts water. No joke. Only suitable for outdoors.
- Sun Apr 21, 2024 1:35 am
- Forum: General
- Topic: If you were to start over, what would you do differently?
- Replies: 12
- Views: 543
Re: If you were to start over, what would you do differently?
I would sow aztekium, pelecyphora and lots of ariocarpus. As many as I could get. But it's never too late......
- Sun Apr 21, 2024 1:27 am
- Forum: General
- Topic: Post winter watering
- Replies: 16
- Views: 3098
Re: Post winter watering
Most Mexican and Sth Texas species should be given a late start. Mid to late spring regardless of the temperature. They are not really active until it's regularly quite warm. Astrophyum asterias and Ariocarpus come to mind. They get their first drenching in summer in my area. Rebutias etc should not...
- Tue Apr 16, 2024 1:02 am
- Forum: General-Succulents
- Topic: Some Roadside Tillandsia
- Replies: 2
- Views: 1229
Re: Some Roadside Tillandsia
Thanks for the pictures. They are very collectable!
- Sat Mar 30, 2024 11:35 pm
- Forum: General
- Topic: Post winter watering
- Replies: 16
- Views: 3098
Re: Post winter watering
I never spray cacti because they aren't orchids neither bromeliads, no practical use at all. I water them when they are moved to greenhouse and temps are high enough, never give them "some drops" but good amount of water. Better later and much than earlier and little. I spray my cacti alm...