And Now For Something Completely Different..

Hmm, metal effect glazes, and titanium sheets from I believe exhausts [ which we have, used for making hand pounded rings ] but if the
pot to tree is as frame to painting, would you end up with folk admiring the pot ?

And not the tree.

Folk have been growing plants in metal [ iron containers ] milk pants for ages. No problems there and in crap soil.

Beautiful pots, going to need really exceptional trees.
Good Day
Anthony

* There is a range of glazes called Garden Glaze, allows one to make artificial hollow clay stones, that are porous and can grow moss.
We have a test Serissa s. on one such clay body. Works nicely.
 
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...but if the
pot to tree is as frame to painting, would you end up with folk admiring the pot ?

And not the tree.
That is why I wanted the pot to look like any other "normal" ceramic pot. It's just another creative medium with a different set of possibilities that clay can't offer.

Adam Holden Pot.jpg

Titanium pots; go for it! The good thing about stainless is the weight. Maybe a lighter metal pot has its place as well though.
 
First, I’d like to say that by no means would I consider this test conclusive evidence. There are countless other variables that could easily change the results so the final conclusion is still up for more testing. I performed the test as fairly as I could.

I setup a test area on my patio mostly because it’s probably the hottest area of my house. I started the test when the sun started heating up the patio and took readings every two hours. Outside pot temperature was taken using an infrared thermometer and soil temperature was taken with a dial stem thermometer. I have a conventional outdoor red colored alcohol thermometer mounted on one of my benches that I used for air temperature. It’s really not an accurate way to calculate air temperature because of the heat radiated off the patio but it is a consistent reference point. I decided to throw in a mica pot at noon and see how it compares. Here are the results:

10:00 A.M. 94° Air Temp

"Pot Type" followed by "Outside Pot Temp" then "Inside Pot Temp" (it's the only way I could get it to post correctly)

Stainless - 86.5° 81°
Green Ceramic - 91° 82°
Red Ceramic - 91° 82°

12:01 P.M. 101° Air Temp

Stainless - 95° 90°
Green Ceramic - 98° 92°
Red Ceramic - 99° 92°
Mica - 120° 90°

2:00 P.M. 105° Air Temp

Stainless - 96° 95°
Green Ceramic - 108.5° 99°
Red Ceramic - 98° 95°
Mica - 118° 99°

4:00 P.M. 105° Air Temp

Stainless - 94° 92°
Green Ceramic - 108° 96°
Red Ceramic - 99° 92°
Mica - 110° 94°

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That's very interesting. Apparently, heat conductivity trumps other factors. Good news!
 
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I setup a test area on my patio mostly because it’s probably the hottest area of my house. I started the test when the sun started heating up the patio and took readings every two hours. Outside pot temperature was taken using an infrared thermometer and soil temperature was taken with a dial stem thermometer. I have a conventional outdoor red colored alcohol thermometer mounted on one of my benches that I used for air temperature. It’s really not an accurate way to calculate air temperature because of the heat radiated off the patio but it is a consistent reference point. I decided to throw in a mica pot at noon and see how it compares. Here are the results:
Yummmmmm.
DATA!! :cool:
 
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I'm doing something wrong with my Spirea (I have 4). Every one has been struggling and I'm not sure why. I repotted the Spirea in the SS pot in a 75% organic soil mix to see what happens. In the meantime I've put an Ilex in the oval SS pot and we'll see what happens. Still nothing in the larger one though I have a Hornbeam that's looking for some new shoes. :)
 
Stickroot said this SS has the highest nickel content out there. I know that people can have allergies to high nickel content. I did a little research: plants need nickel but too much is bad. Here is the link. https://www.ncbi.nlm.nih.gov/m/pubmed/21913127/

Near the end of the article tells why nickel is bad in high concentrations.
I don't know if nickel can leach out of the SS or if it's just because roots are in contact with the metal. Maybe this might be the cause of your plant issue.
 
Stickroot said this SS has the highest nickel content out there. I know that people can have allergies to high nickel content. I did a little research: plants need nickel but too much is bad. Here is the link. https://www.ncbi.nlm.nih.gov/m/pubmed/21913127/

Near the end of the article tells why nickel is bad in high concentrations.
I don't know if nickel can leach out of the SS or if it's just because roots are in contact with the metal. Maybe this might be the cause of your plant issue.
Only pertains to soluable NI.
These pots have been used and discussed by a couple of professors and they have no question that they are safe to use.
Don't breath you might die!
 
@Vin Just came across this thread......thanks for running that test. The results are interesting.

Seeing how the Mica pots fared..........do you use a lot of mica pots down here? I don't but thinking to avoid them in the future
 
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@Vin Just came across this thread......thanks for running that test. The results are interesting.

Seeing how the Mica pots fared..........do you use a lot of mica pots down here? I don't but thinking to avoid them in the future
I'm glad the test provided some useful information. We use mica down here probably about the same as everywhere else. I have several and haven't had any issues with the trees that are in them. I hope this helps.
 
I'm glad the test provided some useful information. We use mica down here probably about the same as everywhere else. I have several and haven't had any issues with the trees that are in them. I hope this helps.

Since I moved here recently I've only been growing down here for 2 seasons. To me the heat is unbearable, my trees are fine but I was surprised at the pot temps in the mica pots that you reported.

At least we don't live in AZ though phewwww
 
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Since I moved here recently I've only been growing down here for 2 seasons. To me the heat is unbearable, my trees are fine but I was surprised at the pot temps in the mica pots that you reported.

At least we don't live in AZ though phewwww
I'm your area I really think you can reasonably expect that tropicals and semis will be just fine in mica pots in full sun as long as the soil is kept fairly moist. Where you may run into issues is trying to keep trees native to the more northern hardiness zones in full sun. A shade cloth or dappled sunlight will help but in the long run you will most likely have a battle on your hands.
 
I just came upon this thread, mostly cause I'm a rookie to B.Nut. But I work in sheet metal fabrication. I was and still am surprised that there are not metal pots being used more. What I can create with what is at my disposal, is almost, too much! NAAAAaaaa. So , I am in the process of making some up, and have some trees to repot this spring into. ( for experiemtal purposes, I used a bunch of the red bucket ones, :) . So like all of you have talk it out have said, I will make some SS, some will get powdered coated, anodized(which can run the rainbow for coloring and is only on alum.), Electro polished. Wet paint. I will try some Cold rolled Steel but will have to have it finished, I.e. paint, powder, Zinc& chromated, can tin coat it, nickel coat it, I will try the alum, again coated and will make linings. I really want to try them all and see, and it seems I'm not the only one !!! Like a funny gentleman here says"Welcome to Crazy!!!"
One thing regarding the SS pots shown on this thread. Whomever made them, speaking from experience, knows there shit!! The cutouts, bending, the welding, grinding, seriously the one with the hammered shaping with the flame torching, name your price. Cause they did great work! So I say Bravo.
So the point I wanted to add was thickness of the metal, these are thicker and not surprised they are cooler, also as some have mentioned the conductivity. But we will see.
Again, am surprised there isn't more, however, in my limited experience compared to many of you, I will say I see the coming of the ages, the old western bar doors swung open, the unhinging of a front bra snap,.. OOOPPPs, went off topic, but the rush of the western world and the influence on Bonsai. The Traditional Asian( cause it is more than Japanese ) ways, instructions, styling, etc, etc, should and will remain respected, but like anything, we western folk want to push the limits, and with nature and art(my two favorite things, hence the Bonsai passion) they are ENDLESS.
Sorry for the rant, look forward to the future.
 
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