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Bidens is a perfect container plant. It spills down the edges of windowboxes, large pots, and planters with starry, yellow flowers and ferny, green foliage. Some varieties are fragrant so plant them where you can enjoy their sweet scent. Bidens likes rich, well-drained but moist soil. While it's a perennial in Zones 8-10, it's usually grown as an annual.
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Angelonia is also called summer snapdragon, and once you get a good look at it, you'll know why. It has salvia-like flower spires that reach a foot or 2 high, but they're studded with fascinating snapdragon-like flowers with beautiful colorations in purple, white, or pink. It's the perfect plant for adding bright color to hot, sunny spaces. This tough plant blooms all summer long with spirelike spikes of blooms. While all varieties are beautiful, keep an eye out for the sweetly scented selections. While most gardeners treat angelonia as an annual, it is a tough perennial in Zones 9-10. Or, if you have a bright, sunny spot indoors, you can even keep it flowering all winter.
Geraniums have been a gardener's favorite for well over a century. The old-fashioned standard for beds, borders, and containers, geranium is still one of the most popular plants today. Traditional bedding types love hot weather and hold up well to dry conditions; many offer colorful foliage. Regal, also called Martha Washington, geraniums are more delicate-looking and do better in the cool conditions of spring and fall.Though most geraniums are grown as annuals, they are perennials in Zones 10-11. Bring them indoors to overwinter, if you like, then replant outdoors in spring. Or they can bloom indoors all year long if they get enough light.
Pretty little violet, blue, or white starlike flowers combined with ferny, green foliage are what make Swan River daisy so popular. It's a top pick for spilling a little of the way over the sides of container plantings and hanging baskets. Or use it in the front of flower beds and borders.This cool-season annual does best when planted in spring a few weeks before your region's last frost date. It needs rich, moist, but well-drained soil. Deadhead to prolong bloom. When summer's heat hits, shear plants back by about half to rejuvenate them and encourage fall bloom.