Leo in N E Illinois
The Professor
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Looks like the steel doesn't heat up. Great news. They are "hospitable to life".
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....but if the
pot to tree is as frame to painting, would you end up with folk admiring the pot ?
And not the tree.
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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Apparently. However, if I ever let the soil dry out a bit I think it would be curtains.That's very interesting. Apparently, heat conductivity trumps other factors. Good news!
Yummmmmm.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:
Only pertains to soluable NI.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.
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.@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 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.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
Keeps the tree from flying off he bench.Stainless Steel and it is heavy.
This is what ive been thinking about, I was going to see if a local foundry could cast some for me., anodized(which can run the rainbow for coloring and is only on alum.) look forward to the future.