The ideal depth of a tree notch depends on the tree, but it should usually be between 20% and 25% of the tree’s depth. However, if the tree is leaning towards the direction of the notch, it can be cut more shallowly—at as little as 10% of the depth. When the tree is leaning away from the direction it needs to be felled, you can cut deeper, closer to 30%.

Yes, cutting a tree's roots can cause it to fall, particularly if major support roots are severed. In extreme cases, trimming roots can affect the tree's structure and stability. Many crucial roots are located just below the soil's surface. If you make severe cuts to roots more than 2 inches in diameter, you risk impacting the tree's water flow and its ability to withstand severe winds or storms. Even cutting roots less than half an inch in diameter under or outside the tree's canopy can cut off its water supply, causing it to decline, die, and eventually topple.

If you don’t trim your palm trees, you can expect several negative outcomes, including:

• Unhealthy palm trees attract pests, diseases, and fungi 

• Dead falling fronds can cause severe injury or damage to your home, pedestrians, or cars

• Dead palm branches are flammable and can catch fire, especially during a lightning storm

If the roots are still alive, the dead tree will usually try to put out new shoots. That doesn’t mean the tree will survive or that the dead parts of a tree will come back to life. If parts of the tree have died and turned gray or rotten, nothing will bring them back to life and they need to be safely removed.