1. Immediately and carefully open your Eucalyptus tree from its package. Completely submerge the root ball in water to hydrate. Place your tree outside in a cool, semi-shady area until ready to plant. Keep in mind, container grown plants, especially in hot weather, need to be watered daily. And remember, Eucs kept as houseplants are not covered under your warranty agreement.
2. Select a sunny location outside and dig a hole 3 to 4 times wider than the container, but no deeper than the container.
3. Carefully remove the Eucalyptus tree from the container keeping the soil around the roots intact. It helps to tap the outside of the container to loosen the edge. Carefully slide the tree from the container. Don't yank the tree out of the container as this can separate the roots from the tree.
4. Sometimes trees become root-bound or the roots look like they're about to circle the root ball. If your Eucalyptus tree is like this, gently loosen the roots to encourage the roots to grow into the native soil.
5. Set the tree in the middle of the hole. Avoid planting the tree too deep. If the root collar sits below the top of the hole, compact some soil under the tree so that the root flare at the base of the trunk is slightly above ground level. Using some soil, secure the tree in a straight position, then fill and firmly pack the hole with the original soil, making sure there aren't any air pockets. For heavy clay soils you can incorporate pine bark mulch or sand/grit or soil amendment products such as Clay Cutter, Natures Helper, etc. to aerate heavy soil. Avoid using rich composts, or soil amendments with fertilizers. Eucs prefer infertile soil and are already fast growers. Keep back-filling until the soil is just below the root collar.
6. Create a water-holding basin around the hole and give the tree a good watering. After the water has soaked in, spread protective mulch 2–4 inches deep in a 3-foot diameter area around the base of the tree, but not touching the trunk.
7. The soil and mulch around your trees should be kept moist but not soggy. During dry weather, generously water the tree every 5 -7 days during the first year. Water slowly at the drip-line.
8. Remove any tags and labels from the tree as these will affect the tree as it grows. You may need to prune any broken or dead branches.
Fertilizer? Do not use fertilizer, heavy organic matter, or chemicals on your newly planted trees. Eucs are disease resistant, minimal feeders, and are extremely fast growing. Fertilizers, especially those with high Nitrogen content, will weaken even a healthy tree.