We live in Boston and had a relatively mild winter. We cut our rather extensive snapdragon plants back almost to the ground last fall, but they all came back up and, in fact, spread. Quite a nice show of pink and yellow but knowing that they are actually annuals in zone 6, we are wondering what to do with them at the end of the season? So you think that they will come up once again in the spring or should we remove them and plant more?
If the winter is mild enough climate Snapdragon can be a short lived perennial.
Certainly enjoy the plants as long as you can grow them and would like to!