<s>[INST] I wanted to grow a tree specifically to create some shadow for a outdoor patio, and I would like to know how many years it would take for a young tree to create a significant canopy for shade. 

While doing research, I'm running into a report from a National Arbor Day Foundation newsletter where a horticulturist was quoted as claiming that 'most trees take around 3-5 years to grow enough to measure a reasonable canopy.' Is this quote a reliable time estimate?[/INST]