Does anyone know why I have no flowers on any of my sweet peas despite them growing to over 1.2m, They are planted on the sunny side of my garden and have been well watered etc
That's all very puzzling. When did you sow them? Can you show us some photos of your sweet peas so we can look for clues ...
Start with the camera icon. If pics don't upload try reducing the size.
Did they produce any buds?
Even if you think you watered well, it's possible that they have but they've dropped off - lack of moisture can cause that. They need a lot, and lots of food. It's very unusual though.
I planted them straight into the ground about the mid to end of March. They seem to have no buds but are very green and tall. Sorry I cannot take a picture as I am not at home until the weekend.