I have a trifoliar plant. One in veg and one 'bout ripe. They're weird, they'll start off really hearty and and above the rest and then.... The one that I have in flower is not turning out as productive than originally anticipated but I got 'em in my seed pool now. LST made little difference fo rit since it grew to the size of the topped plants or maybe it just didn't like the super soil that its in. In fact it the main stem eventually grew a "Y" forming two long little gooey colas and the rest of the plant isn't that impressive. So I wouldn't top them. I'm trying it in super soiless veganics next.