The Victorian Kitchen Garden
I've watched this series about 50 times since I discovered it a few months ago (via. Marjorie. Thank you!). It's just so interesting & pleasant. The head gardener in it is so amazing, I wish I had just a tenth of his depth of knowledge! Another thing I especially love about this show is how they show and use all these very specialized tools and techniques (glass tubes to make cucumbers grow straight, a special tiny saw for harvesting asparagus), it's just fascinating! It makes me want to look for some of these kind of things at antique stores.
(there is also a great related show about cooking The Victorian Kitchen)