I had red that Thuja occ. has toxic essential oils (I think it refers mainly, but not only, to thujone, which are not only toxic after taking oraly, but also after inhalation). It has been adviced to get rid of those plants from the garden, since they secrete oils nearby them. My question is - is this true? Is secretion of plant high enough to couse problems? I assume one small plant would be ok, but since their often grow as high, thick and long hedge, there must be high concentration of essential oils around them and polluted air will be transferred by windows to the house. It has been also said that bees, birds and animals don't like thuja occ., but it is liked by ticks.