I am aiming to collect seed this year for next years summer plants. Can you collect the seed pods as soon as the petals have dropped from the flowers, the pod is still green or do you have to wait until the pod dies back naturally , dries and bursts
You need to wait. there are a few exceptions but not many.
Also check if it's an F1 hybrid. It's not worth saving seed from F1 hybrids as it does not come true to the parents.
ok thanks for the info, see how it goes.