✂ Cut Flower

Who Dun It

Color-shifting lilac blooms that age to mauve, lavender-blue, then white.

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Informal Decorative · 4–6"LavenderSwan Island Dahlias (2000)United States

Who Dun It is an informal decorative dahlia that opens 4–6" blooms in lavender. Who Dun It is the mystery of the late-summer garden: buds open rich lilac, shift through mauve and lavender-blue, and finish nearly white as petals mature. That slow transformation means one planting reads like several bouquets over a few weeks, with cooler flowers picking up warmer rosy tips when nights chill down. It was bred in United States by Swan Island Dahlias in 2000.

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Availability & pricing

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Specifications

Physical

Form: Informal Decorative
Bloom class: BB4–6"
Bloom size: 4–6"(10.2–15.2 cm)
Plant height: 42–48"

Color

Color: Lavender
Pattern: Dark Blend
Tags: lavenderlilacmauvewhitepurple

Growing context

Flowering season: Mid season
Cut flower: ✓ Yes

Provenance

2000
United States
Breeder: Swan Island Dahlias

Grower Profile

Difficulty

Intermediate

Ideal for

HobbyistsFlorists

Growing Who Dun It

Stake early and tie loosely as tall stems can lean once blooms open. Pinch the growing tip above the fourth leaf pair to build a branching, multi-stemmed base. Water deeply a few times each week once buds form, and feed with a low-nitrogen fertilizer through summer to support color intensity. Disbud side buds for cleaner flowers on longer stems. Watch for earwigs hiding inside shaggy petals and trap them with rolled newspaper at dusk.

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