We have a three to five year old olive tree that we planted at the back of our garden approx a year ago.
I am a little concerened as it does not seem to be very healthy. The base of the root sits on the shelf of our clay soil that is 18 inches below the surface. We have not really watered the tree as I did not want to over water. It is in a sunny position but we do get bad winds when the weather is colder,
First question to answer is - has it made any root growth? Second would be - does that area with its layer of clay become waterlogged over winter. An unpleasant little pond, in fact.
If the tree hasn't moved out from its original pot shape - is it root bound? Sometimes, in clay, the roots will wind around the hole you dug because they can't break through the clugginess of the clay.
Possibles: dig up the tree. Check the roots. Do this on an overcast day. Cover the roots with soggy paper after you've taken a look.
Make a new hole at least twice the size of the original wide and deep. Loosen up the bottom of the hole. Using a mix of your topsoil and some aged compost, make a mound in the bottom of the hole at least 15cm deep. Add a stake at this stage. Spread the roots over it as if it was an umbrella and fill in the hole using more of the topsoil/compost mix. Firm down by hand to ensure the roots are in contact with the soil AND there is still space in the soil for air and water to penetrate.
The base of the tree should now be about 5cm or so above the surrounding level and with a low mound fully covering the roots to at least 30cm radius out from the stem.
Gently tie the tree to the stake using proper tree ties or ancient panty hose from the op shop ;-). You'll be checking those ties after winter so make it easy to loosen them off as your tree starts into growth.
Then wait.
Some trees can take several years to actually settle in. Feed as you've been recommended. Water deeply once a week in dry conditions. Ensure the ties are checked frequently to prevent harming the trunk. Only worry if there are ominous signs of increasing numbers of dead bits.
vetivert8
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