Hello Fukuyuminia-san,
I'm now waiting for my flight going back Tokyo in San Francisco airport.
I was in Arizona desert area near Mexico.
I was surprised to hear that this cuctus is growing very & very slowly, maybe a copule of mm per year.
Hello Chica-san,
This cactus is called Saguaro and famous for Arizona and Mexico area.
The photo of this cactus has been moved to city area from desert and it's very healthy.