Weeds

PatArizona

If you MUST try it Eeiko, try it on something that YOU WANT TO ASSASSINATE!

Bad medicine around bonsai...

Pat

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BONSAI isn't about surviving in a storm, rather, how to dance in the rain.
THE ONLY WAY: Always remember, and don't ever forget, that whatever you read here is not cast in concrete... the intent of any advice is to help. In no way should you feel that I’m saying that my way is the only way…heaven forbid! I've seen far too much of the "my way or the highway" attitude in bonsai as well as in other areas of life.

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Glider

Pat's right. Use these only if you want to kill the tree. These 'once a year' weedkillers like pathclear and such are usually glycophosphate based systemics herbicides that are absorbed through the leaves will kill all plants. Some contain growth inhibitors to supress new growth too.

They say on the containers that they become inert on contact with soil, but that's not strictly true, and you don't have enough soil in a bonsai pot to give any margin for error.

Pull weeds by hand whilst they are still small. The roots come out without disturbing the soil and the job's done. Go round once a week when watering. It takes a few minutes.

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Experience is knowledge gained immediately after it was needed.