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Castor Bean

Ricinus communis

Plant a castor bean and then stand back. This is one of the fastest-growing, giant annuals in the garden, rivaled only perhaps by giant sunflower. By midsummer, you'll have a huge (it can hit up to 20 feet) tropical plant sporting burgundy foliage. It's a great plant to grow with kids. Be careful, though. The seeds are extremely toxic.

Wait to plant it outdoors after all danger of frost has passed; castor bean hates cool weather and won't grow well until temperatures heat up in summer.

Light:

Sun

Type:

Height:

From 1 to 20 feet

Width:

3-6 feet wide, depending on type

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how to grow Castor Bean

plant Castor Bean with
Canna

Cannas bring tropical splendor to gardens in all regions. These bold plants feature clustered, flaglike blooms in a brilliant color array on tall stems. Recent flower breeding has created canna foliage that is even showier than the petals, with variegated leaf combinations of orange, yellow, and greens that glow in the summer sun. Dwarf cannas are also available for container gardening and other small spaces. Cannas are usually grown from tuberous roots but some newer varieties can also be raised from seed, with flowering guaranteed for the first year.Cannas provide architectural interest in summer borders and they also flourish along the damp margins of a pond. If you garden in a climate colder than Zone 9 (7 for the hardier types of cannas), you'll need to dig canna plants up and store them bareroot for the next season or overwinter potted specimens indoors. A destructive mottling virus has threatened canna stock in nurseries across the U.S., so be sure to buy your plants from a reputable source.

Hibiscus

Huge, showy blooms are the hallmark of the hibiscus family, whether the flying saucers on hardy perennial hibiscus, the Hawaiian charmers of the tropical hibiscus, or the frilly-flowered Rose of Sharon that grows into a large shrub or small tree. Not only do hibiscus blooms boast an amazing array of colors, vastly widened through hybridizing, they also draw hummingbirds en masse. The newer, dark-leaf introductions are wonderful architectural fillers in container gardens. Cold-winter gardeners can grow the more tender types of hibiscus in containers and wheel them into the house when winter approaches. Prune back heavily to encourage blooms, and watch for aphids and whitefly, which are attracted to all forms of hibiscus. Learn about the perennial varieties of hibiscus. 

Mexican sunflower

Attract butterflies and have fun doing it with big, bold, beautiful Mexican sunflower. Plant it from seed directly in the ground and watch it soar. It can hit up to 5 feet in just weeks with big, lush foliage and smaller but still showy flowers in sunset colors that butterflies love.Put a cluster of these bodacious beauties in the back of the border to give it height and drama. Many of the taller types need staking to keep them upright. Plant them outdoors after all danger of frost has passed in a sunny spot with well-drained soil.

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