welcome to MP, i would use a quality medium and dig a DEEP hole outside with lots of perlite, compost and vermeculite and being sure to add a buffer like dolomite lime will help ensure your lady will be big n strong for the big outdoors. hardening her off to outside weather is important if she isnt outside already. the wind can damage the baby so a sheltered area for a lil while is recommended. i would also say that the more light the better- its best if she gets full sun and plenty of water on hot days... good organic nutreints or compost will help her make those major nuggs.
research on supercropping and topping in the sites growguides in my sig- all the info on growing,harvesting and curing those big nuggs are there!
have a great stay!!!