I use a great many plant labels. First I use them in the
flower beds to identify new plants (old favourites do not need a name tag). I
use them with vegetables, for instance, to remind me where a row of carrots was
seeded before they come up, and to list the variety. Most of my labels though
identify the numerous plants I start from seed in the spring.
I have tried the various kinds of labels that are offered
for sale. The wooden ones have the advantage that you can write on them with a
pencil and as long as the written part is out of the ground, it will remain
legible. However the end of the label that is stuck in the soil breaks down in
one season and any writing in contact with wet soil disappears. The thin copper
labels are very permanent but very hard to read after a few years. They come
with a tie and they are too thin to stick in the ground. The zinc ones held on a
wire stem are very good but too expensive to use extensively.
Plastic labels can last a few years in the shade. The more exposed
to sunlight, the faster they get brittle. You can also write on them with a
pencil (preferably a grease pencil). Usually, one side of the label is less
shiny than the other and is easier to write on. The use of a pencil allows you
to erase a mistake or even to re-use a label. A permanent marker is ideal when
it is indeed permanent. The problem is that some are much less permanent than
others, and it is only when the label has sat in the sun and rain for a year that
you find out if the ink lived up to expectations.