I've looked in nurseries, Home Depot, and Lowes and could not find any horticultural pumice. If you have ever found pumice, let me know where!
On the other hand, my mom brought some pumice scrubber things home from the grocery store to see if they are the right stuff. I crushed them up and they seem legitimate. The only thing I'm worried about with these is that they might have chemicals in them of some sort...
lol, no. It just says "made in china" like everything else these days. That's what makes me a little more worried... perhaps I should just try it out and see if it kills the plants. One pot without pumice, and one with it.
I really think that you can use other materials that will do the same thing, some people use ingredients because they can get them everywhere or for really cheap. I pot 90% of my orchids is pure LFS every year because I can get it really inexpensive, as where other people will go with a different mix because LFS is expensive where they live.
Have you looks for places that sell stuff like sponge rock?
Good day everyone - Sorry to dredge up such an old thread but I have been searching for horticultural pumice ever since I moved away from the western States. There you could get it cheap, and it is so much better than perlite (because it doesn't break down over time and it holds more water while draining better). Plus, the intense white of perlite I find to be visually distracting in a soil mix.
Recently my quest ended when I found a new product "Growstone"; it is man-made pumice! Pumice is just volcanic glass foam, and this stuff is made of recycled glass. They make it on the Albuquerque landfill using the methane from the landfill to fire the kilns. You really can't get more environmental than that.
The stuff feels just like pumice, and is a reddish brown color making it look nice in a soil mix too. Okay, so I don't know if it is yet available in Canada, but you can apparently get it in all 50 states, which already makes it more acquirable than pumice.
Anyhow, if you are looking for pumice it might be worth checking for this in Canada too. They make a large chunk version for hydroponics, and so stores catering to that hobby are good places to check.
I know this was a pretty glowing review, but I assure you I have no association with the company. I am just excited to have an environmentally responsible version of my pumice back to use for growing plants.
Last Edit: Dec 2, 2012 11:36:26 GMT -5 by Apoplast
Hi Drew - Awesome, thanks for posting a link for Canada! I'm glad it's available in Canada too (it would have been a little silly for me to have posted something here about a product that was entirely unavailable in Canada). There seem to be two sizes that are commonly available, a large size for hydroponics - which is probably totally unsuitable for all but the largest CP's, and a smaller size which is slightly larger than the horticultural pumice I used to get - but the smaller size is a pretty good pumice substitute.
All I could find on their website was the larger chunk stuff (link in my previous post) but I bet they have the smaller stuff as well, and if not could order it. The company selling it appears to have a location in Mississauga, ON and Langley, BC.
Good day everyone - Sorry to dredge up such an old thread but I have been searching for horticultural pumice ...
It'll cost about $CDN130 to get an 80lb bag from a Hess distributor in New England. I reckon I will order some in early summer after I get the veggies in the ground - and I free up some space. If anyone else (orchid geeks?) is interested PM me - Apoplast, this guy is in the US. Contact Hess and they can give you someone close to you. Hess are in Idaho.
olihlt: Ah, the 20th century ... when rubber boots were still made of wood.
Jan 22, 2016 0:13:25 GMT -5
amanitovirosa: ...yes, and wood still grew on trees.
Jan 22, 2016 21:40:56 GMT -5
hal: Congrats Olihlt. I got my citizenship on December 9th, 1980. I remember it well because the paper that morning was all about John Lennon being shot.
Jan 23, 2016 23:54:35 GMT -5
amanitovirosa: Nicely played, Gilles Simon of France, almost taking down the world number one in a 5 set, 4.5 hour marathon down under last night. Well done!
Jan 24, 2016 13:58:17 GMT -5
olihlt: hal, that made the day momentous for two reasons, then :-) Were did you immigrate from? I did from Germany.
Jan 25, 2016 21:08:29 GMT -5
danyoh: how long can nep seeds be stored for?
Jan 26, 2016 10:37:00 GMT -5
roraima: No matter how you store them, Nep seeds quickly lose viability with time.
Jan 26, 2016 10:42:20 GMT -5
roraima: I've had excellent success with most Nep seeds that are 1, 2, or even 3 months old. Older than that and you generally get diminished germination rates or no germination at all.
Jan 26, 2016 10:49:47 GMT -5
danyoh: thanks! Bought lots of seeds but wanted to make sure they germinate before I give the extras away
Jan 26, 2016 11:13:52 GMT -5