Historical clue formulations

• Plant affliction that's below ground — 2024-12-30
• Plant disease whose two words differ by only one letter — 2017-06-18
• Plant malady caused by overwatering — 2016-10-30
• Horticultural problem caused by overwatering — 2014-10-03
• Tree trauma — 2006-02-26
• Plant plight — 2004-10-07
• Tree trauma — 1998-09-27