That was one of the top thoughts I had also. Your are probably right. Do you think if I begin to water less the color will recover or will the tips stay yellow?
Well, I don't kill pines very often, even being in a tropical country.
And I found out by experience and following leatherback's advice, that they really like it dry.
So, even in full sun (and I mean
FULL and
SUN !) I water them sparingly.
Once a day in high Summer, every two or three days in Spring and Fall, and every week or so in the Winter.
They love it!
Akamatsu (Japanese Red Pine, Kengai)