I don't usually sow in the autumn but last year when I was clearing away my sweetpea plants I found a few seed pods and sowed them and put them in the cold frame.
These were potted up 9/11 and this is how they look today;
All I plan on doing with these is sticking in a few 8ft canes an making a few obelisks for my son and daughter.
The one from purchased seed which I will keep for myself and which I sowed at the end of February are about 6"(150mm) high now.