What is the correlation between age and quantity of flower pots?

My parents are away for a couple of weeks. I tend their flowers. My gosh they are many! I had to walk around their house with one watering can in each hand. Would it look the same if only my dad lived there? Certainly not. I guess he should be happy for my mother’s green fingers. My dad has always been into gardening , but not flowers. Why is that? And has my mother levelled up her flower game during the years. What will this house look like if she was hundred years old?