man, if u can get a proper bag of some good gardening soil whatever u have in there, i use my own home country made black forest soils. mMM, mm, some good soil. One 15 l bag minimum, fill up the hole, make sure theres a good drainage at the bottom of the hole.It is wise to dig up that soil underneath it as well, obvious things.... Chicken wire, or any other similar, better if in green color.I dont usually use them long, only to get them big enough to be tough enough to take those critters
and if
do not use the slow release ferts, or stick bomb i call them...better be on a nice feed schedule if u can ! If not, then yes, do it.