Welcome aboard, Edwin!

Indeed your galleries have lovely images.
Are those frost spikes in your photo? If so, can you tell me more about them? I am particularly interested because they are rare where I live and I have no idea how they form. I posted a few pictures of formations on my deck a couple of years ago (in the old forums,
this post and three more that it links to). Anything more you can tell me about these, I would like to hear it. Thanks!
--Rik