This article has been written by guest writer Marco - from livetogarden.com
Native to South America, the tree dahlia - Dahlia imperialis can be grown farther north with proper care and maintenance. Hardy to Zone 8, it is becoming increasingly popular among gardeners in the southern and western United States, and even grows wild in parts of Hawaii.
If you’re looking for a sun-loving plant to add a little height to your garden and provide a splash of color to your outdoor rooms, the Dahlia imperialis may be the perfect addition to your landscape.
Planting Tree Dahlias: Soil and Sun Considerations
Dahlias are excellent tropical gardening ideas, and as such, they thrive in sunlight. Full sun is best, though some gardeners have reported success with as little as half-day sun.
Soil for dahlias should be rich and moist but can range from sandy loam to slightly clay. Drainage is extremely important, as dahlias are sensitive to both too much and too little water. Consider adding perlite to your soil for improved drainage, especially if you live on the West Coast, where winters are particularly wet.
You’ll want to keep the tree dahlia’s roots moist and cool. Plant your tree between 8 and 12 inches deep, and mulch it heavily.
Protecting Tree Dahlias: Pruning and Sheltering
Although they like full sun, tree dahlias also need to be sheltered from wind—they’re bamboo-like stems are brittle and break fairly easily. You may also need to stake the stems and tie every foot or so of growth, leaving the top few feet free. Pieces of nylon make great ties because they’ll stretch as the plant grows, unlike plastic or string, which may cut into the stem, causing damage.
Tree dahlias are sensitive to frost, so if your area experiences 'colder than normal' temperatures, especially overnight, you may want to cover your plant to protect it. Use burlap, linen or even newspaper, which will let the plant breath. Plastic will trap moisture on the plant, potentially doing more harm than good.
After it flowers, the tree dahlia may prune itself, reducing its height to just a few feet. If it doesn’t, you’ll need to cut the stems down for winter. You may also wish to trim new growth by up to half. If you want a bushier, rather than a taller, plant, trim the top of the dahlia tree every few months through the growing season.
The Dahlia imperialis is one of the best tropical garden ideas we can think of, and something we believe will look fabulous in your landscape.
For more information click onto:
Clematis montana 'Grandiflora'
Dahlia Pests and Diseases
Dahlia 'War of the Roses'
Dinosaur Plants: The Cycad
Dinosaur Plants: The Sago Palm
Dinosaur Plants: The Tree Fern
Euphorbia pulcherrima - The Poinsettia
How to Care for Poinsettias
How to Grow Crocosmia
How to Grow Dahlias
How to Grow Echium from Seed
The Hooker's Lips Plant
How to Grow lavendar?
How to Grow Lavender
How to Grow Lavender from Seed
How to Grow the Sago Palm from Seed
How to Grow Schitzostylis
How to Grow Tree Ferns
How to Over-Winter Dahlia Tubers
How to Grow Hibiscus
How to Plant and Grow Dahlias
How to Propagate Bamboo?
How to Propagate Dahlias
How to Prune Lavender?
Paeony lactiflora 'Bowl of Beauty'
The Dragon Blood Tree
The Hardy Begonia - Begonia grandis
The History of the Dahlia
The Oriental Poppy
The Trumpet Vine
What is Bamboo?
What is Lavender?
What is Lobelia?
The Monkey Puzzle Tree - Araucaria araucana
The Wollemi Pine
White Bird of Paradise
Why is my Tree Fern Dead?