Answer: At this point, I would turn off the sprinkler watering that particular plant and water it by hand. Eucalyptus likes well draining soil and deep watering once each week. By watering by hand, you can control the amount of water your tree gets. The easiest way to water a single plant is to make a watering well or watering basin beneath the tree or shrub, radiating out about 12" from the trunk. When it's time to water, fill the basin, allow it to drain, then fill it a second time. This will concentrate the moisture directly over the root system and allow it to trickle down and wet the entire root mass. Do this once each week and you should see your tree perk up within a few weeks. Once it is healthy and growing well, you can either keep watering by hand or you can reconnect the sprinkler head.
Best wishes with your garden!
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