I'm Becky. I'm finding out that my behavior is not that of an addicts, but completely normal (at least here!) LOL! I started 29 different varieties of heirlooms - all from old seeds (2009-2012). All 29 varieties of tomato seeds germinated!!! Some with more success than others. Now I have 100+ seedlings taking over the living room, dining room and spare room. Its like Wild Kingdom in here! Of yeah, in the garden, I have room for 40 or so plants.

I usually get great advice over on the Home Decorating Form. Post over there and I'm sure you'll get some help.

Windsor One is Finger Jointed and Edge Glued Radiata Pine (similar to a yellow pine). I would not use it. If you don't go with Hardi I would look at Azek or the like.

Means that you can bring the trim (1x4) over the window slightly and bury some of the frame on the sides behind the trim. You must leave the sill to terminate on the trim for drainage preservation, but you can hide some of the profile of the window on the sides and head.