Re growing sweet peas?

i think it depends on when they were sown and if they have already flowered? also is there the chance that the new growth you have is acutally new plants from seeds they have set themselves at the base of the old plant, but not part of the old plant it's self? i have had that before now, and they have flowered lovely the following year. if not then i would say that if they were sown last spring and have flowered and set seed then it is unlikely that they will do very much, as they have already completed there cycle as an annual plant, if they were sown late and have either only had a few flowers that did'nt set seed, or they have'nt flowered at all there is a good chance that they will flower. i am not 100% sure either way but i know that you can sow them late on in the season for the following year as long as they have a bit of potection from frost, and they don't fully complete there cycle. will be interesting to find out what results you get.

Assuming you've got annual sweet peas (not the perennial type) then I would think that the plants are long dead. But you can check to see if there is any life left in them by scratching the very base of the stem with your nail just where the roots begin. If there is green underneath the outer layer, then they are still alive and you might be in with a chance.
I would agree with Majeek tho - if anything starts growing in the old pot, it is likely to be from seeds that fell from the parent plants. Incidentally, sweet peas tend to come true from seed and the seed lasts for a very very long time, so it's worth collecting.

The sweet pea in question was sown last spring and flowered through out the summer. It is the same sweet pea as I only cut it down a month ago to 6" high. There has been no flowers on it since last autumn (too cold etc) but it stayed green and alive. Since it was there and I'm not one to give up or throw things away, I thought I would give it ago.
I shall take a pic over the weekend so as to explain whats happening. I havn't seen any new growth yet, I'm just wondering if theres a chance of it happening.

i am sorry to say if it has flowered right through last summer it is highly unlikely, as it has already completed it's cycle - unless ofcourse it is a perennial variety as Sid has said. if it has been protected from frost through the winter this would explane why it has'nt died right off if it is an annual, but would think it will eventually die anyway as annual plants only live for one year! you never know though trees - there are always acceptions to the rules in nature, if it was dead headed well last year you never know! it could be a 'die hard' sweet pea! lol - why not nic name it Bruce! lol - and you have nothing to loose by giving it a go! keep us posted!

I dont consider myself to be a gardening expert but im going to set everlasing sweet peas. So i guess they must be perinial.