I agree caution is advised when you melt any metal, but with
adequate observation there's no reason to dismiss the green stick
Trouble happens when you use a "wet" stick, you leave the stick in
the melt, or you use a species of plant that is turgid with water.
It's the same reason that the silver, in your example, erupted out of
that plaster mould. Too much water. Water and hot metal are a very
There was a aluminium foundry in Melbourne, that exploded and took
out a lot of property. Someone threw a full glass coke bottle into
the molten aluminium, if the bottle had been plastic, the liquid
would have evaporated before it touched the molten aluminium, as it
was the glass provided enough protection to make a lethal bomb.
Melting metal should not be taken for granted.
That PSA said, a green stick is better than a dry wooden stick
(ime), but remember I do gravity pours, and am using Delft clay, so
need the melt to be as best as it can be, no gas, no inclusions, no
impurities... especially if I'm using a lost foam model.
The bonus is that you end up with a carbon stirring rod anyway (or
some fuel for the charcoal forge).
Be safe these holidays, and seasons greetings.
Regards Charles A.