I have a sweet pea vine that's been growing by a fence for past several years. I have been trying to get some started from seed. I filed and soaked the seeds but can't seem to get any to grow. What am I doing wrong? Any help much appreciated.

The perennial ones seem to work best with a cold treatment -- how they naturally germinate outside. I'd stick the seeds in the refrigerator a couple weeks then back to warm and see if you get germination.

I would try planting in a pot and putting it outside in the ground or planting outside in late winter, as soon as you have unfrozen ground to cover seeds. Also, my experience is put it where you want it as moving is impossible; very deep roots. Cutting to get rid of the plant goes on for several years. I love my perennial sweet peas.