allelopathic wood in hugels?

Just got done reading Sepp Holzer's Permaculture and I'm all for hugelkultur as soon as I get land I can actually dig on. My question was wasn't there something about alleolapathic (ok I know I butchered that word, lol) trees like pines and furs or was that just walnuts and locusts? Anyway, do these types of trees cause issues in hugelkultur beds and what kind of issues? Since I moved into an apt I have not been able to have a garden, but then Sepp had some good ideas on creating a permaculture garden on a balcony. I have a big deck I don't use for anything really. I guess I'll start there. The yard is off limits