When Should I Pick The Seed Pods?

[SPideorcihid14]

Hi everyone. I am new to this forum, and did not know whether or not to post in advanced section or beginer because of the topic. So yesterday I hand pollinated a Brassia orchid a paphiopedilum orchid and a phalaenopsis orchid. I want to harvest them as green pods for seed sowing, so how long do I wait before picking the seed pod on each one?

I hope I was clear on what I was asking but if not feel free to ask questions for clarification.