I have slowly been trying to get all my trees into good quality pots. By good quality I mean Japanese, old chinese and or hand-made western potters pots.
When I started bonsai I couldn’t see the point of spending money on good pots. Australia is flooded with cheap pots that are made out of China and I couldn’t see why you would bother spending 3, 4, 5 or more times what a cheap chinese pot cost on a Japanese or other container. I would much rather have spent the money on trees or tools. After all pot is a pot right? Not really, not all pots are created equal.
Take the two pots below. The first is a cheap Chinese pot i picked up a month or so ago. I needed a pot for a pine i was re-potting and didn’t have time to get anything of better quality. So I went to a local nursery that had a good range of cheap pots. Below is the pot I used. As you can see, after only a months use it is already weeping white ‘stuff’ from the clay.
If you compare it to a Japanese production pot such as the one below you will see that there is no issues with white ‘stuff’ on the Japanese one. These two pots are beside one another on the bench and both have Japanese black pines in them. If the white deposit was from the water I use it would be on all my pots but this cheap chinese pot is the only one showing these signs. What is most worrying is that this white stuff began weeping out of the pot during the first week of use. If it is on the outside of the pot I am sure it is also weeping through on the inside as well.
I talked to an importer at a local show about this issue. His family run pottery kilns in China and he imports their pots. He said there was a range of quality coming out of China at the moment. The best stuff goes to Japan and the rest goes to Europe, America and here. He said that to make the pots cheaper things are added to the clays to make them go further and reduce costs. Now im not a chemist, but……. I believe it’s these additives or impurities that you can see weeping out of the pot surface above. The white deposit is definitely not something I want to see on my pots that is for sure.
But when it comes to pots, materials are only the beginning of the differences. There are many differences that in my mind make using better quality pots well worth while. Now I am not saying that every cheap or Chinese pot will give you issues. I have a few cheaper Chinese pots that I like a lot but there are definitely a lot of bad, poorly made pots out amongst the few good cheap ones.
Hopefully in the next couple of posts I can begin to show some of the other differences that make quality win out over a cheap price. It has taken me a while to appreciate good pots and hopefully I can share some of the things I have learnt along the way.
4 comments
Comments feed for this article
October 14, 2012 at 9:15 PM
Happy Potter
Hi Joe,
That white stuff sounds like efflorescence – the sort of thing that comes on new brickwork and masonry. It is just the result of water moving through the material, dissolving salts and then as evaporation occurs on the surface the salts are crystallised out. This is usually asociated with masonry so it is a bit of a worry when it is coming out of what should be an impermeable ceramic material. It will however over time stop as all the salts are moved out. A porus permeable pot that allows the passage of water will also create a home for vegetative patina – so the white stuff may well be followed by green stuff!
Cheers,
Happy Potter.
October 15, 2012 at 8:48 AM
bonsaijapan
Thanks for the information Mr. Happy Potter. SO in your mind does this suggest a bad quality of materials, a low and or poor firing or some other cause? I think that what ever it is, i dont want to have it anywhere near my bonsai, especially in and on their pots.
Thanks for the comment.
Joe.
October 21, 2012 at 11:25 AM
japanesepots
Hurrah for the effort in promoting good pottery Joe! I’m sure you’ll have no problem finding something nice to replace that chinese POS soon ;-). If it is salts, and it certainly appears to resemble base mineral buildup, and it’s weeping on the inside too, that’s a major problem, and could be changing the ph of the soil from neutral or slightly acidic, to basic….that’s not a happy pine and very unhappy myccorhyza!!! I’d slip pot into something else post haste. JBPs are vigorous and strong as all get out, but a serious impediment to micorhyzal growth after repotting in spring can result in bad news!
October 27, 2012 at 12:49 AM
Jonas
Interesting topic, I’m just starting out and I always thought buying nice pots would be far in the future for me. I used to assume that the white stuff on the outside of one of my pots was lime from the water, now, leached ‘stuff’ from the pot seems more likely. I wouldn’t be too worried about ‘masonry salts’ inside the pot though. Since it’s wet on the inside and dry outside, the soluble stuff in the clay should be moving outside mostly. Might be that roots growing against the pot walls are worse off than in a good pot, but they would be worse off anyway, wouldn’t they?
I’m mostly just speculating though.
In any case, good post. Better