In the course of the discussion, I mentioned my favorite garden plants for the San Francisco Bay Area and a listener asked if I'd post them on this blog. So here we go.
Dustin also mentioned his favorite plants but even though he's the professional nurseryman, I think my picks are better so I'll list mine first.
All my comments pertain best to the San Francisco Bay Area's climate, where there's little or no frost.
Bougainvilla, Spectabilis. 15-20 foot tall, drought-resistant when established, and truly "spectabilis."
Bougainvillea, James Walker. More open plant habit than Spectabilis but the color is super--the hottest pink.
Zinnia, Magellan Coral. Available in six-packs for just a few bucks, these are annuals but flower machines, blooming nonstop on compact 12"-tall plants from May through November. The actual color is more coral and less pink than in this picture.
Meyer Lemon. These are a bit sweeter than standard lemons but they're far from oranges. In addition to the good fruit, the 5' tall by 8' wide shrub is ornamental. That picture only mildly overstates how prolific it is. Do remember that all citrus are very heavy feeders--That means that an orange, lemon, or grapefruit tree with a four-foot spread, it needs about three pounds of heavy-nitrogen fertilizer every year, divided into three doses: perhaps April, July, and September. My guest recommended using Maxsea acid plant food. Other experts recommend using any old high-nitrogen fertilizer, even lawn fertilizer, which is much cheaper.
Poppy, Drama Queen. Surreal 4" flowers on a 4' tall plant. If I were making a movie about a utopian future, this would be part of the landscape. The problem, alas, with poppies is that they bloom for just a few weeks and then look like crap for the rest of the year. So you might want to buy a 4" pot of it and one of Poppy Naughty Nineties mentioned below from Annie's Annuals, let 'em bloom and when seed pods form, harvest the seeds, save 'em in dry place, then plant 'em in 3-4" pots in November or December and come spring, you'll have brand new plants plus plenty to give away.
There are other terrific plants I didn't have time to mention:
Argyranthemum, Comet Pink. These are classic 1 1/2" daisies in clear pink, in profusion, constantly for eight months in a row. Best of all, they completely cover the 2-foot wide symmetrical mound. By December, they get leggy, so take cuttings, dump the plants, and in early spring, plant the rooted cuttings.
Impatiens, Xtreme Lavender. (if your area doesn't get downy mildew). There are other good impatiens in the Xtreme and Accent series but I find this color particularly attractive. And the plants are vigorous, quickly growing into a 8"-tall mound.
Tomato, Early Girl. I've tried every darn tomato that's claimed to be the best-tasting: Brandywine, Cherokee Purple, Big Beef, Better Boy, and Park Whopper, and in the end, at least here in Oakland, Early Girl is always the best-tasting. If you like very small cherry tomatoes and don't mind their tendency to crack, even better tasting is the yellow Sun Gold.
Kumquat, Fukushu. Whether or not you like the taste of kumquats, this is a most ornamental plant. In China, it's often grown in pots as seen here, but can grow in the ground in the Bay Area.
Viola, Denim. This is my winter savior. (Also viola morpho.) When everything else is dull, ratty or dead, this is producing flowers like this on a disease-free, 8" plant. Available in six-packs for just a few bucks.
Now, let's turn to the recommendations of the guest on my radio program, Dustin Strober.
Rose, Double Delight. Yeah it's fragrant but it's gawky and mildew-prone.
Poppy, Naughty Nineties. Yes, it's great. Almost as good as Drama Queen.
Alonsoa Meridionalis (Apricot or Red) I hadn't heard of this one but it sounds like a winner--a three-foot tall plant covered with bloom for a long season. Available at Annie's Annuals. (Update: I bought it. No big deal.)
Tibouchina. The flower is a gorgeous royal purple, which cover the 6-to-8-foot shrub for months at a time.
A caller mentioned the wonderful tuberous begonia. A shade lover, many of these trail and so are perfect for a hanging basket--if it doesn't get destroyed by mildew.
And finally, three plants that I think are overrated
Lilac. Blooms a few weeks and then for the rest of the year, it's a gawky shrub.
Iris. Blooms for two weeks and then, yeah, it has, year-round, decent lance-shaped leaves, even variegated, plus it's drought resistant, but nah.
Primrose. There are thousands of types, but I'm talking about the common ones they sell in the supermarket. They bloom for a few weeks in the winter, get damaged by rain or squirrels, and then, it's to the garbage with them. Not worth buying. You want winter blooming on a compact plant? Try the aforementioned Viola Denim and, even better, Viola Morpho.
As always, I welcome your comments and questions.