YUCCA ROSTRATA exotic blue color joshua tree hardy desert caudex cacti 4" plant YUCCA ROSTRATA exotic blue color joshua tree hardy desert caudex cacti 4" plant This beautiful healthy plant easy to keep but hard to find, Don't miss this one , The showing pot is 4". Water for seedlings is the most important item to keep them growing for first few weeks. Generally, most seedlings, which are 1 week old will die after 3 days of dryness. 2 month-old seedlings can survive for 1 week if allowed to dry. 6 month-old seedlings can survive for 2 months if allowed to dry. 1 year-old seedlings can survive for 5 months if allowed to dry. Light is very important once the seeds begin to germinate; studies show seeds on any light condition (even dark) will germinate if keep in a humid atmosphere and ideal temperature but everything changes once they sprout. After germination, they need the right wave of light (color) in order to obtain good results. Air circulation: If the seedling are kept inside a house with air conditioning under artificial light or windowsill this will not be a problem. Even under a tree, most of the time, the conditions will be good for seedlings; but if the seedlings are kept in a greenhouse or enclosure, it is most important to keep them well ventilation.