when Asa
Chapter 14 describes the outward prosperity of the kingdom, and Asa's superficial reformation; chapter 15 the true reformation.

third month
i.e. June.

mother i.e. grandmother. 1 Kings 15:13; 1 Kings 15:13
grove
(See Scofield "1 Kings 15:13") . See Scofield "Judges 3:7".

Israel
i.e. the northen or ten-tribe kingdom.