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Thomas Edison

A century old and still the truest purple in the field.

Thomas Edison dahlia bloom

Mark Twyning / Wikimedia Commons / CC BY-SA 3.0

Informal Decorative · 8–10"Purple1929United States

Thomas Edison is an informal decorative dahlia that opens 8–10" blooms in purple. Rich royal purple that photos consistently fail to capture. Introduced in 1929 and named for the inventor with his own approval, Thomas Edison remains the benchmark for large-format purple dahlias, the color modern breeders still measure themselves against. It is a 1929 United States introduction.

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Availability & pricing

No growers are currently listing Thomas Edison on The Dahlia Hub.

Specifications

Physical

Form
Informal Decorative
Bloom class
A8–10"
Bloom size
8–10"(20.3–25.4 cm)
Plant height
42–54"

Color

Color
Purple
Pattern
Solid
Tags
purpledeep purpleroyal purplelarge

Growing context

Flowering season
Mid season
Cut flower
✓ Yes
Exhibition
✓ Yes
Stem length
24"

Provenance

1929
United States

About Thomas Edison

A pre-war dahlia with more than 97 years of continuous catalogue history.

Growing Thomas Edison

Tall grower — stake early and firmly.

Spacing
Space roughly 2–3 ft apart
Staking
Stake early — stems carry heavy blooms and lean in wind

Frequently asked questions

How tall does Thomas Edison dahlia grow?

Thomas Edison reaches 42–54" at maturity, so plan to stake plants early to keep heavy blooms upright.

When does Thomas Edison dahlia bloom?

Thomas Edison is a midseason bloomer, in flower from midsummer through first frost.

Is Thomas Edison dahlia good for cut flowers?

Yes — Thomas Edison is well suited for cutting. Stems typically reach about 24″.

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