First, check whether your plant demonstrates any of these symptoms:
A common signal indicating your plant is overwatered or has root rot.
Too much water, too little water, aggressive fertilizer…
A plant get too tall (that is called ‘leggy’)
Your plant needs more sunlight! It tries to grow higher to reach the sun.
Few or no flowers
Usually, this implies the nutrients imbalance (probably, nitrogen deficiency).
Your plant gets too much direct sunlight - it has ‘sunburn’. Move it away from windows ASAP!
A plant is sad as it suffers from drought.
Your green pet experiences distress. Try improving the watering routine.
The soil is too wet or too dry. Develop an infrequent but deep watering routine.
White powdery fungal growth
Your plant is infected by some kind of fungus (most probably, powdery mildew).