i have an Agonis tree that has been in ground for 2 years and always been healthy. Recently its leaves have gone very dry and curled. cant see any pests or fungus on them. Tree is watered quite regularly and the ground seems very moist. has in ground ag pipe for watering. I did about 8 months ago re-stake the tree about 200mm from trunk which i didint think would cause any issues. Any advice would be great.