Historical clue formulations

• Colorful shrubs in the genus Rhododendron — 2025-06-16
• Their petals are used to make a traditional Korean wine called "dugyeonju" — 2025-01-11
• Flowering plants associated with the Augusta National golf course — 2022-03-09
• Plants whose name derives from the Greek for "dry" — 2020-10-30
• Relatives of rhododendrons — 2019-05-16
• Relatives of rhododendrons — 2018-03-13
• Cousins of rhododendrons — 2014-06-18
• Rhododendron relatives — 2012-09-02
• Showy shrubs — 2008-03-27
• Heath family members — 2004-03-20
• Shrubs of the heath family — 2000-11-18
• Spring bloomers — 1998-02-27
• Blooming shrubs — 1996-02-03