There is so much to say in praise of copper tools that it's hard to understand why we don't use them more often. As well as being deeply practical, they make very glamorous gifts for gardeners when new and still softly gleaming.
In its pure form, copper can be beaten or formed into complex shapes without cracking. When combined with small quantities of other metals, notably tin to make bronze, copper retains its flexibility but becomes considerably harder and more durable.
Copper tools are sharp and can be sharpened with a whetstone or file. Whatsmore, because the metal has a low coefficient of friction, there is less tendency for soil to cling to it. Copper tools glide through the ground and need minimal cleaning, however, they can be dented if they hit stones or other large obstacles.
Copper does not rust so tools made from bronze have a much longer lifespan than those forged from iron. Over time they will develop an attractive patina that helps to protect the metal beneath. As copper tools are used, minute amounts of copper are deposited in the soil benefitting microorganisms but deterring slugs and snails. Traces of copper also increase the soil's ability to retain water, which is particularly useful in light, sandy or dry situations.