What Causes Yellow Needles in the Spring?
This is Part II of last month’s post, Rain and Needle Size…
…as rain is again the likely culprit. Or possibly, overwatering with the hose.
In the post about rain and needle size, a correlation was drawn between unseasonably wet springs and long pine needles. Another indication of too much rain (or overwatering) for a pine is that the new spring needles grow out yellow.
The solution to this problem is being sure that watering is withheld until it is clear the tree is drying out a bit (about 70% dry is a good way to think of it.) Also, don’t neglect the fertilizer. Doing both these things can green up yellow needles later in the season. Last year’s needles, if yellow, are harder to green up.