Irish Blackhart Dahlia
Description
Irish Blackhart is an eye-catching dark-toned dahlia, prized for its velvety, near-black to deep burgundy blooms that add dramatic contrast to brighter summer colors. Its richly saturated flowers sit on sturdy stems and make striking cut blooms, bringing a moody elegance to garden borders and arrangements alike.
Specifications
| Form | ST |
|---|---|
| Color | BI |
| Bloom size | 5" |
| Plant height | 3.3 ft |
| Hybridizer | Steve and Sandy Boley |
| Year introduced | 2014 |
| Country of origin | USA |
How to grow Irish Blackhart
Irish Blackhart is a ST with 3.3 ft tall with 5-inch blooms. Plant tubers 12–18 inches apart in full sun after the last frost. Pinch when plants reach 12 inches tall to encourage bushier growth and more blooms.
Harvest & vase life
ST-form dahlias like Irish Blackhart harvest dahlias when blooms are three-quarters to fully open. With clean cuts and fresh water, most varieties last 4–7 days in the vase.
Where to buy Irish Blackhart tubers
Similar dahlia varieties
- Alloway Candy — ST, PK
- Bloomquist Blush — ST, LB
- Bloomquist Pinwheel — ST, L
- Bloomquist Pumpkin — ST, DB
- Budapest Blush — ST, PK
- Clearview Pataha — ST, BR
Frequently asked questions
How tall does Irish Blackhart grow?
Irish Blackhart grows to about 3.3 ft.
What color is Irish Blackhart?
BI — ADS color classification for Irish Blackhart.
Who hybridized Irish Blackhart?
Steve and Sandy Boley, introduced in 2014.
Is Irish Blackhart good for cut flowers?
Yes. Dahlias are among the most popular cut flowers for home and market growers. Expect 4–7-day vase life with proper hydration.