Hi. I have had my "dwarf" ponytail plant for approximately 2+ years. It is approximately 6" in height and the pot is 6" in diameter and about 3" deep. Just this past week the leaves are yellowing from the inside out and are droopy. I sure hope it can be saved!! Thanks bunches!
Too much water and/or too little light, especially as it enters its active growth period. Water thoroughly only after the soil has completely dried. It'll get that light green-yellow, weak growth if it isn't getting enough light when it comes out of its dormant period.