Garden Plant Guide: Dahlia Flower Lee's Product Team, June 14, 2024October 27, 2024 Everything You Need to Know About Dahlia flowers for Your Landscaping Dahlias are renowned for their stunning, vibrant blooms and versatility in the garden. With a variety of shapes and colors, these perennial flowers can be used to create striking floral displays. Dahlias are relatively easy to grow, making them a popular choice among gardeners. Understanding the key attributes of dahlias will help you successfully incorporate them into your landscape. AttributeDescription for Dahlia PlantsSizeRanges from 1 to 6 feet in height; blooms from 2 to 12 inches in diameter.Insects & PestsRelatively pest-resistant but can be susceptible to aphids and spider mites.Bloom TimeBlooms from mid-summer until the first frost.MaintenanceModerate maintenance; regular deadheading and staking are recommended.Root GrowthHas tuberous roots that store energy and nutrients.SeasonalityTender perennials; may not survive harsh winters.Watering NeedsRequire consistent moisture; avoid overwatering to prevent rot.Sunlight RequirementsThrives in full sun; needs at least 6-8 hours of direct sunlight daily.Soil CompatibilityPrefers well-draining, rich soil with organic matter; avoids heavy clay.Growth RateModerate growth rate; blooms in about 8-10 weeks from planting.Hardiness ZoneThrives in USDA Hardiness Zones 3–10, with winter protection in colder areas.Color & AestheticsAvailable in nearly every color, perfect for vibrant displays.Wildlife AttractionAttracts bees and butterflies, supporting ecosystem health.Allergy ConcernsGenerally low allergenic; suitable for most gardens.Edibility/ToxicityNon-toxic; certain varieties may cause mild stomach upset if ingested.Wind ToleranceCan be top-heavy; may require staking in windy conditions.Invasive PotentialNot considered invasive; manageable in garden spaces.Mulching NeedsMulch helps retain moisture and suppress weeds; keep it light.LifespanCan last several years with proper care; tubers can be stored over winter.FertilizationRegular feeding with balanced fertilizer promotes growth and blooms.Companion PlantingPairs well with zinnias and marigolds for a colorful garden. See also Year-Round Homeowner Guide for Maintaining Plants, Lawns, and Pests in Seattle, WA Garden Plant Guide