Hello , i have the same problem ...
My cream mandarine began to have yellow leaves very early at day 45 since the germination start .
now at day 55 : they continue to grown
look , a picture of Buds
View attachment 2309153View attachment 2309152View attachment 2309151
i think they need 15 more days to be ready to cut . (70 Days )
Have a nice grow !!