u/Due-Personality8137

The one in the second pic I’ve had for a few months, first pic I’ve had for about a month. Recently moved them outside (in Louisville, KY) and leaves have begun to yellow. They get a few hours of afternoon sun each day. Could the yellowing be from too much sun? Or too much water? Or too little? I water my euphorbia very sparingly, but have watered a bit more since it’s been quite hot. Any advice is appreciated