Giant Dracena Marginata care
Purchased 3 10+ feet tall Dragon Plants from craigslist . These are over 40 years old. I had them outside until a week ago. There are some yellow leaves but I have read that lower yellow on each shoot is normal for growth. I want to be sure I am watering enough and giving them good care. Do these look normal? Any helpful hints? They are in a 22 inch wide pot and seem to be packed in there. I think they were repotted some time ago - at least a year maybe two. Should I repot? With the soil so deep how do I know when itÃ¯Â¿Â½s ready to water? Also, during the summer some of the tips turned brown and dry.