Sam has a brown thumb but is very earnestly into plants and keeps giving Cas recommendations on the exact temperature and humidity that his plants need to be in. but when Dean and Cas go on vacation Sam dotes on them WAY too much and ends up overwatering. Cas hits him with the “Greetings, plant killer” and gives him a fake plant that Sam waters and fertilizes for months before he knocks it over and only realizes it’s fake when it stays intact













