If the tree is not already at its height of 'glaucusness', you can try
adding epsom salts to the soil at the following dilutions:

Liquid epsom salts: One tablespoon per gallon
regular epsom salts: One teaspoon per gallon

the magnesium is essential for 'blueness'

Dave


"Requester" wrote in message
om...
is there a way to make them bluer than what they already are? i want
to make one that i have a more shinier brighter blue. will fertilizer
help?
thanks