More context: I have a narrow strip near a an area I just cleared for vegetable gardening and I want to plant a shrub there that's taller than it is wide with or without pruning. Since its next to a vegetable zone, it might get some water on it (or at least on the roots) during summer. Ideally the plant would be evergreen and flower. I already know of a few plants that somewhat fit this description, but curious to hear what else is out there. Extra points for a plant that's normally dormant without summer water. Area is Los Angeles.

I just planted a new hedge, but it will be years before the new trees/shrubs are big enough to fill the space and provide privacy. I have a few fast growing short lived perennials and annuals that will get to 6-7 feet and some Joe Pye Weed but it still feels sparse. I'm going to try and collect some of my common milkweed seeds and get a new patch going there next year. I try to keep the garden mostly native (or at least beneficial to the same bugs/bees/animals in my area) so was thinking Big Bluestem Grass could fill the space, but can't find it anywhere locally except small plugs. The area, at least until the new trees/shrubs fill in, is full all day sun.

Any suggestions for plants that will get tall/full enough to provide some privacy?

Anyone know where I could get somewhat mature Big Bluestem within an hour or so of North Shore MA?

Any other suggestions for providing some added privacy? I've seen some fun garden decor if anyone has recommendations on where to find that.

Edit: Added a milkweed flower picture for visibility