You cannot splice this item. You can find this item in plants category. Plant 40, harvest 40, brake all the blocks, repeat. Received experience is a mystery. Keep an eye out for the exp counter. Hit this baby 3 times and see if you get some gems or a seed. By default you should get at least 1 seed back. Will you strike it rich? You just have to count the gems yourself. Massproducing HEDGE can be tricky. You will find out after you have harvested a few.