I don't understand the problem.
In Word draw a text box or whatever you want. A little tool bar will appear with change the direction of text on it, click on it and the text will run in another direction.
There are several ways of doing it without a template. You could do two of your seed packets to a page, side by side and just cut them down the middle after printing.
It doesn't sound as though you have Publisher, but it is not a difficult problem, just look for a template for a folded card, if you find using a template easier.