US Plant Patent PP18574
Sweet Caroline Bewitched Purple
Ornamental sweetpotato plant named ‘Sweet Caroline Bewitched Purple’
PUBLIC DOMAIN
Patent expired March 31, 2026. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.

The record
- Patent number
- PP18574
- Filed
- March 31, 2006
- Granted
- March 11, 2008
- Expires
- March 31, 2026
- Assignee
- UNIV NORTH CAROLINA STATE
- Inventor
- YENCHO GEORGE CRAIG; PECOTA KENNETH
Abstract
Ipomoea batatas ‘Sweet Caroline Bewitched Purple’ is an erect to semi-erect, bunch-type cultivar producing many shoots and having very dense foliage. This cultivar is distinguishable from other cultivars by its large, reniform, toothed, purple leaves and erect to semi-erect architecture. The plant has good vigor, is very well branched and produces an attractive, round mound of foliage. It is well suited for container production and/or ground cover or border applications. The production of flowers by ‘Sweet Caroline Bewitched Purple’ is limited even under short day conditions.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultivar of Ipomoea batatas plant named ‘Sweet Caroline Bewitched Purple’, substantially as illustrated and described herein.
Read the full patent: US Plant Patent PP18574 in full — the complete specification, every figure, and the file history.