Black Forest Ruby Dahlia Seeds

2025 AAS National Award Winner

Give beds and containers contrast with Dahlia Black Forest Ruby. Dark-red flowers glow against nearly black foliage, creating interest even between flushes of bloom. Flowers measure 2 to 3 inches across and range from semi-double to double, with some variation typical of seed-grown dahlias. Sturdy plants reach approximately 20 to 27 inches tall, offering the presence of a statement plant in a size suited to everyday gardens. Its striking foliage, flowering, and upright habit make it a compelling choice for gardeners seeking to spice up their summer annuals.

Grow Black Forest Ruby in full sun for summer color that continues into autumn until frost. It performs beautifully in sunny borders, mixed beds, and patio containers filled with fertile, well-drained soil. Water regularly during establishment and dry weather, allowing excess moisture to drain freely. Remove spent flowers to encourage continued blooming and keep the display attractive. Its sturdy growth generally needs no staking, simplifying care compared with taller dahlias.

Start seeds indoors approximately 6 to 8 weeks before the last expected frost. Cover lightly with seed-starting medium or vermiculite and maintain 65 to 75°F; emergence generally takes 5 to 12 days. Provide bright light after germination, then harden plants off before transplanting. Direct sowing is also possible after frost in warm soil, although indoor starting usually brings earlier flowers and a longer season of color.

• Beds
• Border
• Containers

• Award Winner
• Butterfly Lovers
• Easy Care Plants
• Long Bloomers
• Repeat Bloomer