- 1). Wait until the frost danger has cleared for your area and your olive tree is beginning to show buds. Pruning back your tree before then could leave it vulnerable to frost damage.
- 2). Trim back budding branches, eliminating buds, using the Anvil pruning shears. If your olive tree has few or no buds, it can't produce flowers. While it's unlikely that you'll be able to identify and trim off all of the buds, this is the most environmentally safe option. You'll reduce the amount of flowering from your tree while avoiding introducing chemicals into the landscape.
- 3). Wait until your olive tree is about to bloom; the ideal window for the first chemical spray is two to three days before bloom time. Prepare a dose of the naphthaleneacetic acid (NAA) compound that is 150 parts per million.
- 4). Coat the branches of your olive tree with the NAA compound, using the handgun sprayer and wearing the face mask. To be effective, the NAA product must coat the entirety of the leaves and the buds.
- 5). Wait one week to apply the second dose.
- 6). Apple the second dose of NAA compound in the same manner as the first. This should stop your olive tree from flowering for the season.
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