If its too dry, the buds will just sit there, and eventually shrivel and drop off without opening at all - that's true of most plants when they're suffering drought, they'll sacrifice their flowers in order to survive.

It does look better Bernard mine has also improved.

If you are new to this plant a word of warning: When it has flowered it flops and looks a mess. You can cut off the old stems and it will probably send up a new lot and flower again. It is an extremely tough plant and can be invasive if happy , so watch out for new plants appearing all around round it.

I like the way it flops over Steragram, I dont find it spreads

You are lucky Drc - mine keeps coming up even after i thought I'd dug it all up! I'm glad you like it though - everybody needs friends, even floppers!