I bought a 5 ft tall yucca with 2 trunks 18 months ago. For a year, it did GREAT indoors. Now, the taller tree's top leaves are turning brown and drying up, day by day. However, the shorter one, still doing great. The taller one has a shoot of very healthy leaves down low. ARe these leaves starving the top leaves, or what? What can I do? I water about once every 2 weeks, just like always, but suddenly, those top leaves are a mess!
