You can crop it right back. Initially I would maybe try cutting just one branch - is it green inside or brown - if its brown cut it right back to the shaft of the tree.If its green then you still have life.Well watering may help.
Step 1
Plant your olive trees in soil that drains well. The olive will grow in almost any soil conditions, including acidic, alkaline, stony or sandy soils, but they require good drainage.
Step 2
Plant the trees in full sun, where they can get at least six to eight hours of direct light daily.
Step 3
Water the trees once a week for their first year. Thereafter, olive trees require almost no supplemental watering, tolerating drought and extreme heat with equanimity.
Step 4
Prune heavily to encourage the tree to grow into the shape you want. For a clean, straight trunk, cut off the lower branches up to the point where you want the tree to start spreading out. If you want the tree to have several trunks, tie the lower branches or the suckers that come up from the base of the tree to stakes positioned at the angles you want the limbs to grow.
If its the same(Brown)all over then you have an issue ..worth getting another and trying again ?
edited by bowbellscowbells on 19/01/2011
<em>edited by bowbellscowbells on 19/01/2011</em>