Posted: 04/04/2016 at 16:28
Can I say, I hate it when things go wrong, but as the guys have said don't give up....it's all a learning curve. Having said that, I would be letting you down if I said things were looking good.
Where do I start? As the guy's have already said yours look soft/tender and are probably being affected by cold (a common problem with garden centre plants) motto for the future 'grow your own from seed'......nothing special required, just sow the seed in situ about this time of year.
From what I can see, It would seem to me that just one pot would have been sufficient, as there seems to be several individual plants at each cane......so somehow you'll need to get rid of some, leaving just a couple of plants at each cane.
Another problem is that inasmuch as sweet peas are very deep-rooted, your container is too shallow.
Sweet peas are climbing plants, so require a structure to enable them to climb, rather than a single cane. As I don't know what variety they are, perhaps you may be able to see the eventual height from the label information.
I sure there will be further questions, which I'll be happy to answer if I can.