Each and every person born on earth will (have to) belong to any
one of these 27 stars. If you have date and exact time of birth, it can easily be traced down by any astrologer. Now each tree here corresponds to that particular star.
Each tree here keeps giving energy to that particular person / people born during that particular star. So any aliments or health problems are set right / healed / cured when you spend / request / talk / meditate near or under that particular tree, corresponding to their star. So the presence of the complete set of 27 trees directly creates a healthy and sound physical, mental, psychological and spiritual well being which is the ultimate and absolute bliss to oneself and to the earth too.
