He's looking for any excuse to engage you in a conversation and to break your boundary. He can't stand that you are taking back your life. As for the plant...he may have forgotten to water it and if it's dead...what did he expect you to do about it? Go get another one? I certainly wouldn't.
No response needed to his last missive except...oh, well....
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.