Search found 2786 matches

by TimN
Thu Feb 22, 2018 4:00 pm
Forum: General
Topic: Halp
Replies: 3
Views: 70

Re: I need all the advice and help please

The important thing is that you're trying and learning. Everyone kills a cactus or three (dozen). My only advice for taking advice is consider the geographic location of the advice giver and how that relates to your environment. You need to adapt the advice for your situation. It will take experimen...
by TimN
Wed Feb 21, 2018 3:58 pm
Forum: General
Topic: Meet the most expensive cactus
Replies: 11
Views: 200

Re: Meet the most expensive cactus

Anybody can list a cactus for $250,000, finding an actual buyer is the tricky part. Also, I don't understand how the seller personally profiting is going to make a bit of difference to the survival of the species. If survival of the species is the paramount concern, donating it to a research facilit...
by TimN
Mon Feb 05, 2018 9:05 pm
Forum: General
Topic: Cactus rot
Replies: 15
Views: 247

Re: Cactus rot

My experience has been that most cactus rot is caused by an injury of some sort. Could be an insect, some sort of physical damage, repotting and trimming roots, etc. One thing that complicates determining the source of rot is that a cactus will rot on the inside for quite some time without showing s...
by TimN
Wed Jan 31, 2018 10:16 pm
Forum: General
Topic: What to Do .....?
Replies: 6
Views: 215

Re: What to Do .....?

Yes, just cut them off at the joint with a sharp, sterilized blade. Let them dry for a few days, then plant. I normally don't water something like this for a few weeks, and then only a small amount of water from the bottom. Once you see new growth, return to normal treatment. And, yeah, your plants ...
by TimN
Wed Jan 31, 2018 10:14 pm
Forum: General
Topic: Night and day
Replies: 6
Views: 144

Re: Night and day

Where did this come from? From the DesertSun article. Author states: "Because gas exchange is active at night, the roots are better able to take up water applied to the soil." No supporting evidence is presented for this astonishing assertion. What does one have to do with the other? The article con...
by TimN
Wed Jan 31, 2018 10:02 pm
Forum: General
Topic: Night and day
Replies: 6
Views: 144

Re: Night and day

Unless your soil is above 212F/100C water is NOT going to boil, unless maybe if barometric pressure is negative or something. You would have far more urgent problems under those conditions than steamy roots. I have watered my plants when temps were well over 110F with no observable ill effects. My u...
by TimN
Mon Jan 29, 2018 10:13 pm
Forum: General
Topic: Incidental Melocactus seedlings
Replies: 11
Views: 238

Re: Incidental Melocactus seedlings

I've had better luck with volunteers than I did sowing seeds. I have dozens of A. fissuratus and A. retusus. Mammillaria, Tehlocactus, Turbinicarpus, and Lophocereus seem to do well for me also. I find Loph seedlings all over the place.
by TimN
Fri Jan 19, 2018 5:57 pm
Forum: General
Topic: Sandstone for cacti
Replies: 5
Views: 153

Re: Sandstone for cacti

The only issue I see is that sandstone will dissolve in acid. Well, the carbonate bonds that hold the quartz sand grains together will dissolve, the sand itself is pretty durable. If you're acidifying your water it will turn the sandstone back to sand, if you're not, it might work. I've never seen s...
by TimN
Tue Jan 09, 2018 9:03 pm
Forum: General
Topic: Mineral mix and fertilizer
Replies: 12
Views: 353

Re: Mineral mix and fertilizer

Keep in mind that the Dyna Gro 7-7-7 is effectively 2.1-7-7. There is only 2.1% Ammoniacal Nitrogen. Read Elton Roberts' and Malcolm Burleigh pieces (links above) to understand how these two Nitrogen forms are handled by cactus/succulents. I've been mixing my own fertilizer since I read those papers...
by TimN
Tue Jan 09, 2018 8:44 pm
Forum: General
Topic: Lophophora sp. in the US
Replies: 7
Views: 219

Re: Lophophora sp. in the US

I've grown L. williamsii in the US for 10 years or so without problems (AZ). I don't advertise that fact, generally. I'm not sure how many police officers would recognize the plant, tbh. I bought my plants mail order from Portugal, as I recall. I've sold them on ebay, given them away, etc without pr...
by TimN
Wed Dec 20, 2017 9:39 pm
Forum: General
Topic: Grafted parodias
Replies: 4
Views: 195

Re: Grafted parodias

hahahaha, the public buys cactus that have been spray painted colors like blue and red, and have fake flowers hot glued to them. A weird little stick holding up their brightly colored "cactus" isn't going to cause them a minutes concern. The lollipops found in the big box stores in AZ are generally ...
by TimN
Wed Dec 20, 2017 9:31 pm
Forum: General
Topic: An another questio for you-
Replies: 15
Views: 445

Re: An another questio for you-

I don't have the real answer, but I know that Opuntias are considered more "primitive" plants, less developed. To me, the shape doesn't make much sense, with the thin, wide shape instead of globular they don't get the advantage of less surface area per unit of mass. I"m not an Opuntiod expert, but I...
by TimN
Tue Dec 12, 2017 8:15 pm
Forum: Cultivation
Topic: Pumice vs perlite
Replies: 27
Views: 715

Re: Pumice vs perlite

One other thing: Perlite - volcanic glass heated to puff it up. It's essentially porous balls of glass. -manmade Vermiculite - mica heated to puff it up. Mica is decomposes into clay. Like mica, vermiculite is not very durable and will break down over time into clay. -manmade Pumice - Can be similar...
by TimN
Tue Dec 12, 2017 8:06 pm
Forum: Cultivation
Topic: Pumice vs perlite
Replies: 27
Views: 715

Re: Pumice vs perlite

I use a product called TurfaceMVP which is a calcined clay product. It's similar to the clay oil-absorbent found in auto parts stores or clay cat litter. I get Turface at my local irrigation supply store (their website will help you locate a local dealer). I pay about $17 (US) for 50 lbs. Turface is...
by TimN
Wed Dec 06, 2017 10:08 pm
Forum: Cultivation
Topic: Salt deposits
Replies: 6
Views: 275

Re: Salt deposits

Let me as a question: is the water you use on your plants untreated? Is your tap water hard? (Water in Phoenix is around 400ppm) Is your tap water alkaline? I think this looks more like calcium which has to do with the content of your water and it's alkalinity than your media. If your water is alkal...