An adjustable ground anchor comprises an anchoring post for securement in ground, base plate fixed on the top of the anchoring post, and L-shaped brackets on the base plate. Slots in the base plate reside symmetrically in relation to the center of the base plate and extend along a line passing through the center of the base plate. Two L-shaped brackets lay on the base plate, each having a slot in the flange abutting the base plate. A through bolt is mounted through the slot in the base plate and the slot in the flange of the bracket above, wherein the slots allow the bracket to freely move on the base plate prior to tightening the through bolt. The brackets form a retaining portion for a post that is fixed between the upward pointing flanges of the brackets.