I always start dahlia tubers in pots. They need warm soils and heat to initiate growth and soils in my area are too slow to warm up so that if you plant directly in the ground, they tend to be late to show up. After they have grown to about 10-12 inches, I transplant carefully into garden. That's usually midMay in my area with a soil temp of around 60F. Full sun.

I have successfully grown Prince Charles in this same west-northwest exposure on the back side of my garage here in Houston. Prince Charles is listed as either a viticella hybrid or a late large flowered group on the Clematis on the Web website. I really love the violet blue color of Prince Charles, which is a color that seems to glow at dusk. I also think most any of the viticella hybrids would work well for you. In my experience, these types of clematis can be cut back after bloom, and they will repeat bloom, pruning for the last time at the end of summer, just like one would do for roses to get a larger fall bloom.

Though I didn't find it listed in any of the catalogs I archived on Help Me Find for California Nursery Company, Odorata was sold for many years as a garden rose, just as Dr. Huey was and still is. Those plants may be the remnants of garden plants or stock plants or they may be escaped stocks. Who's to say they were even produced by the company? They could have been obtained and planted from other sources. There was discussion in the 1930s, particularly by Dr. J.H. Nicholas, about which stock seemed better for which rose class, but that wasn't as important as what stock was the most universally suited across the country. You didn't want to bud cold hardy door yard roses to Gloire des Rosomanes or Odorata then ship them to climates too cold for them. Nor did you want to supply the arid, alkaline areas with multiflora (which entered the picture later than those) as it isn't happy in alkaline, dry, compacted soil. Wichurana hybrids are as they secrete acids in their root zones to help alleviate the alkalinity. Based upon where the majority of their sales occurred, the stock best suited was usually selected. A few tried using multiple stocks for different zones but it usually proved too expensive and led to left over plants they had to move or destroy. Economies of scale made it easier and more profitable to use one stock and leave it at that, which is what producers do now and have for decades. I wasn't quite sure if you were suggesting budding roses to fruit stocks. That is thought to be why the fruit viruses (apple mosaic virus - referred to as rose mosaic virus, prunus necrotic ringspot virus and strawberry ringspot virus) are in our rose product. It's suspected it resulted from Luther Burbank's propagation experiments.

Naked lady flowers (Amaryllis Belladonna) grow like weeds where I live in Sonoma County -- we can see 1/2 mile of them growing along the roadside in August, and I don't know of anyone who plants them intentionally. Many of them simply have been there for 20-30 years. It does not matter if you plant in part shade or in sun, although they seem a little bigger and deeper pink in sun. I don't think I've seen them in full shade, like under redwoods, but I've definitely seen them in blazing hot sun in the worst clay soil in the world, as well as in pretty dappled oak shade. Easy plant to grow if the conditions are right. I know Sonoma and Marin County both are perfect for them in August. Bloom for three weeks, maybe a month at most, and then done. Probably one of the least fussy flowers here. I plan to grow some in my back yard, along a fence, but no one seems to remember planting them who I've asked, so I'm not sure when! I am thinking maybe early Spring, just after frost, but no idea oddly, because they are just everywhere here.