yellow needle tips

Hi guys, Could you please help me and tell em if this is normal? The needles seem to be yellow and browning at the top leaving them bottom green. Only minor so far. it is been quite hot here recently and been in the sun all the time.

Hello all, I have some experience with bonsai, 3-4 years, but no real training. This Black pine was a new addition this winter and recently it's begun having brown tips. I have never had a pine, but from my research they lose their old needles very slowly, but at the same time once they show...

It's Spring here in South America and some needles of my cascade red pine are turning yellow on the tips. New growth (this year's) is blue/green with no yellowing; but old needles have visibly damaged tips. I have searched online, and at other bonsai forums, but apparently could be from "normal"...

Greetings all (and specifically Vance). I am a novice and welcome your comments/advice. The following is an update on the Mugo I purchased approx. 2 years ago from a nursery in Ottawa, CA. Based on advice from Vance and others here (thanks), I cut off ~1/4 of the almost completely sand base and...