I have many seedlings of 4 different kinds of bamboo, moso, b. bambos, b. lako, and d. asper 'betung hitam'. After they have germinated, how long do they need to be in a very humid environment? I covered the germination container but they are getting quite tall and need to be moved (or the lid left off). What humidity requirements do they have? I understand all bamboo can't dry out, but how long should they remain covered? Thanks