I finished putting up stone veneer in a window well a little over a week ago and looking for advice on when/if to apply a sealer to it. I got it installed just before the rains have set in for the fall. I probably won't see frost until late October or early November here in Oregon. It's going to be solid rain until next June at the earliest. The stone is travertine tile in 6"x24" panels. I'm wondering if I should wait till next summer to seal it or wait for 30 days after the mortar has dried a bit and then apply. Or, do I need to seal it at all? It will be exposed to the elements year round but doesn't see much sun, I'm concerned if moss or something may start to grow and stain the stone. If need be, I could put up a tent around it and put in a heater for awhile. I'd like to finish landscaping around it but so far I have left it exposed to allow the mortar to dry. The plan is to have dirt, then bark chips up to the bottom level of the stone veneer around the outside edge. Any ideas?