Sonnet

Sonnet

Azalea plant name ‘Sonnet’

PUBLIC DOMAIN

Patent expired June 7, 2025. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on April 30, 2025. This patent earned 38 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP16784, the photograph of Sonnet printed in the patent.

Figure 1 from US Plant Patent PP16784, reproduced as printed. Photographs in a plant patent are taken by the applicant. Reproduction of the patent document is permitted; the image is shown whole and uncropped for that reason.

Abstract

A new and distinct cultivar of Azalea plant named ‘Sonnet’, characterized by its dark green-colored leaves that do not abscise during the cooling and forcing periods; uniform and outwardly spreading plant habit; freely branching habit; uniform and freely flowering habit; relatively rapid flowering response; plants begin flowering about 33 days after cooling treatment; lavender-colored flowers with ruffled margins; double flower form; good postproduction longevity with plants maintaining good flower substance for about three weeks in an interior environment; and good resistance to Cylindrocladium in inoculated trials.

Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.

1. A new and distinct Azalea plant named ‘Sonnet’, as illustrated and described.

Read the full patent: US Plant Patent PP16784 in full — the complete specification, every figure, and the file history.

The record

Abstract