There are only two types of tress: active/solar - day, air and fire trees, and passive/ lunar - night, water and earth trees.
I suggest you gain knowledge of your oracle tree: the ogham, element, rank, personality opposites, God form even the Tarot Equivalent. Your effort will enhance your magic. (Can find ogham chart in the book-The 21 Lessons of Merlyn. God form and Tarot equivalent on my site on the Celtic Activity page.)
Oracle Trees are lines of communication between mankind, the plant kingdom and immortal spiritual beings. The trees are visited to attain knowledge when one is dissatisfied with materialism, a need to heal emotionally, spiritually, mentally and physically, or to increase eco-consciousness.
Let us, then, step into the woods or backyard and find your own personal Oracle Tree - hollow and accessible with an opening in the trunk above the ground. The right tree will 'make itself known to you' when encountered.
Venture and find a tree and summon the wood spirit to share their strength - blending the energies to help. Call upon the Spirit of the wood to make the its will known through the Oracle Tree. Understand it is not the tree itself supplying the requested advice, but simply acting as a channel. Pose your question, and the reason you need to know.
Knock three times upon the trunk and request: Spirit of the wood, I summon thee.
After greeting the tree, wrap both arms around the trunk to blend the energies. Relax a few minutes. Breathe air in through your nose, down into your lungs, into your entire body, then exhale out your mouth.
Every living thing has unique energies sensitive to the frequencies or vibrations of every other energies. The tree can give an energy boost.
Feel the tree's energy moving into your arms and hands, flow toward your shoulders, approach your abdomen and travel down and up your legs. Absorb the energy through your joints and filter into every cell to remove tensions.
When you become refreshed, close your eyes,and SAY: Ancient one of Earth, your power residing, here in the tree, requesting your energy to combine with mine - for patience in my pursuits, calming, impulsive, nature requesting you share your strength. Here my call, ancient wood spirit.
Listen for a message.
Thank the tree for sharing their strength and wisdom Inhale deep breaths of air to adjust your energies. Say thank you for the oxygen which you breathe in and say my gift to you is carbon dioxide I breathe out.
Leave a small creature a treat-bird seed or bread crumbs around the base of the trunk to feed fellow nature friends.