Dahlias are perennial plants with tuberous roots, though they are grown as annuals in some regions with cold winters.
Dahlia flowers can range in size from petite 2-inch lollipop-style pompoms to giant 15-inch “dinner plate” blooms. Most varieties grow 4 to 5 feet tall. The blooms of this class are fully double, and the central disc is not visible until the blooms are aged. The petals are flat and broad with a blunt point.
Dahlias plants are borne from tubers, which require well-drained soil and plenty of sunlight. Select a planting site with full sun. Dahlias grow more blooms with 6 to 8 hours of direct sunlight. They love the morning sunlight best. Choose a location with a bit of protection from the wind.
Bedding dahlias can be planted 9 to 12 inches apart. The smaller flowering types, which are usually about 3 feet tall, should be spaced 2 feet apart. The taller, larger-flowered dahlias should be spaced 3 feet apart. Tall, large-flowered cultivars will require support. Place stakes (five to six feet tall) around plants at planting time and tie stems to them as the plants grow.
These plants prefer well-drained, acidic loam but will grow relatively well in any soil as long as it isn’t soggy. Dahlias love moist, moderate climates & brighten up any sunny garden with a growing season that’s at least 120 days long.
Do not water the tubers right after planting; this encourages rot. Wait until the sprouts have appeared above the soil to water.
The Dahlias make excellent landscaping additions for flower color in the garden. Their blooms work as great cut flowers making them perfect in flower arrangements