RM James Dahlia
Description
RM James is a showy, garden-bright dahlia that produces full, well-formed blooms on strong stems, making it a great choice for both cutting and display. Its lush, layered petals create a classic, high-impact look in the border, and the plant’s generous flowering habit keeps the color coming steadily through the season.
Specifications
| Color | LB |
|---|---|
| Bloom size | 4" |
| Plant height | 5 ft |
| Hybridizer | Merle |
| Year introduced | 2025 |
| Country of origin | USA |
How to grow RM James
RM James is a dahlia with 5 ft tall with 4-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
Dahlia-form dahlias like RM James 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.
Similar dahlia varieties
- RM Baby Girl — FD, DB
- RM Berry Kiss — FD, DP
- RM Hannah Joe — FD, L
- RM Moonlight — FD, L
- Rm Summer Haze — FD, BR
- RM Watermelon — FD, BI
Frequently asked questions
How tall does RM James grow?
RM James grows to about 5 ft.
What color is RM James?
LB — ADS color classification for RM James.
Who hybridized RM James?
Merle, introduced in 2025.
Is RM James 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.