GROWING DAHLIAS
Dahlias are native to Mexico and Central America where they are considered perennials. Dahlias are of the Asteraceae family of dicotyledonous plants, its relatives include the Sunflower, Daisy, Chrysanthemum, and Zinnia.
Dahlias are some of the lowest maintenance, highest production cut flowers and garden plants you can grow throughout your summer and autumn garden. Dahlias make excellent cut flowers with a lengthy vase life one plant can produce hundreds of flowers, for weeks on end.
WHAT MAKES A DAHLIA SO UNIQUE?
Dahlias are unique as they have a very unique genetic make up. Humans have two sets of chromosomes, but dahlias are octoploids, with eight sets of chromosomes. This allows for a plethora of unique forms and colors. Dahlias grow tuberous roots that can be divided and replanted called "tubers"
SEWN FROM SEED?
OR TUBER?
The most common start to growing a Dahlia is by planting it's "tuber" but it is possible to grow dahlias from seed.
ONE BIG DECIDING FACTOR of seed vs. tuber lies in the amazing genetics discussed earlier, and where it gets even more fun.
When you plant from seed you are opening yourself up to a variety of colors and forms given their unique genetic make up.
But, when you plant tubers you're getting the exact copy as the parent plant, so the same form and color, every time.
SEED
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Dahlia seeds can be started early indoors and gradually harden off young plants before planting out after the risk of frost has passed.
They can also be direct sewn in warmer zones.
DAHLIA CARE
watering
Dahlias prefer a moist soil
Water deeply 2–3 times a week, especially during hot and dry periods
Use drip irrigation to direct water to the roots
Avoid overwatering, which can cause root rot.
fertilizing
Dahlias prefer a slow-release
lower nitrogen based fertilizer
Cover the area with compost before planting
Use a bloom-type fertilizer monthly from mid-summer until early fall.
staking
Dahlias are rapid growers and thrive when staked to support their own weight and prevent breakage from the elements.
deadheading
Deadheading your Dahlia will promote more blooms.
propagating
Dahlias are easily propagated from basal cuttings.
TUBER
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If you don’t have space to plant the tubers in pots first you can put them straight into the ground in spring -- only after threat of frost.
Dahlias thrive once the soil temps reach approx. 50 degrees.
Plant the tubers just under the soil surface and ensure they are approximately 24" spaced.