Why are my orchid leaves turning yellow!? Six reasons why - not all are bad! - and what to do!

This week's video was inspired by an SOS from a friend: Matty! WHY are my orchid leaves turning yellow???? Or course nothing is EVER that simple...but these are six causes I've experienced as to why your orchid leaves can turn yellow. I'm no expert and there are many other factors and causes, but with a process of deduction you can often figure out what is going on and what you have to do - if anything in some cases! So here are the six causes I've experienced and what to do....and one of them was the (probable) cause of my friends yellow leaf!
0:00 introduction to why are my orchid leaves turning yellow?!
1:37 Reason no 1 - it's a natural part of the life cycle!
9:43 Your orchid might be deciduous
11:28 Your orchid might be an annual grower
12:45 Reason no 2 - light!
15:41 Reason no 3 - water!
15:54 Reason no 4 - temperature!
17:03 Reason no 5 - food!
17:54 Reason no 6 - disease & root rot!