Cistus?

No Cistus is that tiny afaik. And they don't have four petals.

Well, in my defense, it's not the crispiest photo, and blowing it up makes it worse lol.

OP stated that it's one inch high and has four petals. I agree the photo is not much help, though.

Could you zoom in and crop your photo and post that? I can’t see enough detail in the low res version that got posted.

If the plant is 1in tall, then those flowers are less than a quarter of an inch in diameter?

Hmmm.... Might be a Lobularia.... On the fence, though, 'cause I would've recognized that since they have so much of it in the garden -- mostly in white and shades of purple. This didn't have the classic Lobularia clusters of little flowers. Wish I'd payed more attention to it ;) They have it growing in a tall urn style large pot so photographing it to my usual standards didn't quite work out as I'd hoped for the resulting photo.

In terms of size, the blossoms were about the diameter of a pea .... A bit bigger than an individual Lobularia blossom.

I'm adding a link here to the higher res. version to maybe generate another ID possibility....

☛ Click here for higher res. version ☚

Thank you to all who've responded so far!!

Take a look at Lobularia Raspberry Stream.

Could be.... Thanks!