From 1 to 8 feet
2-6 feet wide, depending on type
Good For Privacy
Good for Containers,
how to grow Mexican sunflower
plant Mexican sunflower with
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.
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.
Nasturtiums are so versatile. They grow easily from seed sown directly in your garden’s poorest soil and blooms all season until frost and are never greedy about food or fertilizer. Nasturtiums are available in either spreading or climbing types.Plant spreading types in large containers to spill over the sides. Plant them alongside wide paths to soften the sides for a romantic look. Use nasturtium to brighten a rock garden or between paving stones. Plant them at the edges of beds and borders to fill in between other plants and add soft, flowing color. Train climbing types up trellises or alongside fences. The leaves and flowers are edible; use them as a showy plate garnish or to jazz up salads.
Find more about choosing and growing annuals
How to Pick Healthy Plants
The Best Annual Flowers of 2014
Trend Spotting with BHG: Flower Combinations
Top Shade Garden Plants