I'm setting up a shelf for just smallish Cacti & succulents and as I'm limited to a 36" x 18" x 18" space (which will include the light fixture taking up 2-4" of vertical space) I only want the weirdest of the weird.
I'm seeking advice as to some of the weirdest smallish cacti you guys know of, meaning odd shape, strange colors, etc. Please post a pic of your suggestions if possible as I know next to nothing about cacti and names alone don't mean much. I saw one that looked like nothing but a solid grey cube (??) I thought that was totally surrealistic! But I was lazy and didn't write the species name down and couldn't find it when I checked for it again later. I like the neon colored cacti at walmart but someone said that they won't retain that color for long if I cut it off and try to root just the colored top portion (revert to green). They all seem to be grafted ontop of a columnar cacti of some sort, will it stay neon colored if I cut most of the column off and reroot the grafted column under the soil so the column isn't visible?
One of the weirdest I've seen was the Dorstentia. I ordered 3 different species seed off ebay today: D. crispida / D. foetida (the seed is off distinct varieties grown by the seller if not actually diff. species) and D. hinklemanii (or something like that). Does anyone have experience with these HP Lovecraft "vegetable-horror" looking plants? How long before the star shaped exploding seed pods come out? In the first year or longer?
How big are these liable to get and how soon? Most flowering Dorstentia plants I saw pics of looked quite small (under 12") and I'd wager only about 6" on average but are these 10 year old plants?