I new to caring for euphorbia. I watered almost a week ago. Today, I noticed this brown streak. It's been about 20–28℃ indoors in the last week. I don't know if it's too much or too little water. Lots, but not direct, of sunlight. Any help is much appreciated.
@bongo That's what I was thinking. I only gave it about 100ml of water for a plant about a meter tall.
Moisture meter reports almost just a hair above baseline dry.
@jeremiahlee looks like a desert plant so not watering in a month or so should be fine, no?