The 31-year-old model doesn't doubt her ex-husband's ability as a father but likes Flynn, three, to have a childminder with him to ensure he maintains a routine.
Speaking to The Sunday Times newspaper, she said: ''The nanny is with him [Flynn] all the time when he is with Orlando; don't get me wrong, he's a great dad, it's just me being a protective mother and wanting to make sure all his needs are met.''
However, the stunning star - who split from the Hollywood hunk last October following three years of marriage - insists Orlando, 37, doesn't have a problem with the arrangement as it puts ''less pressure'' on him.
Meanwhile, Miranda previously admitted she and Orlando speak every day and still have a ''very good'' platonic relationship as there is still a lot of love there.
She said in June: ''We speak every day. We're really close, we're going to be a family forever and we both really do love each other.
''We have genuine love and respect for each other. We're very connected and I feel grateful for that. We created something beautiful together and we both remind ourselves how lucky we are to have that. And yeah, it's good. He's a great dad. I'm lucky.''