My first can be found, in a TREE, but not on the GROUND.
My second not PERMITTED, but certainly ALLOWED.
My third is in GREY, if it is spelled the English way.
My forth is in PEA, but not in NUT.
Fifth is in HOUSES, also in HUTS.
SIXTH always in DAY but never night.
My last is in STICKY, but not in BUN
My whole very large it weighs a ton.