Boxwood – New Leafs Light Green to Yellow

(Question)

Hi there, I live in Richmond Hill, ON, I had planted many 3 gal boxwood shrubs around the edge of the walk way last fall. triple mix soil was used as the soil bed and i had applied root booster last fall and this spring. the walk way is east facing and it gets a lot of sun light through out the day.

In the past winter, i had wrapped them with burlap and sprayed them with the wax to protect them from the harsh winter wind. Given the wet spring and summer we had this year, i did not water them through out the season. New buds were formed through the spring and now, as you can see from the attached pictures the plant grew significantly larger.

However,issue i currently have with the boxwoods are the new leafs. they do not have the deep green. the new layer of the boxwood has this pale green, while the inner leafs (old leaf) are still deep green.

it would be great if you can let me know what is happening, what m i doing wrong and what i have to do to keep them healthy. THANK YOU!!!!

(Answer)

If there are no other symptoms and the new leaves are of a uniform light green, then it appears that your boxwood is healthy. It is normal for the new growth to be of a lighter colour, then gradually darken as the season progresses.

For your reference, here is a link a comprehensive article on Boxwood Diseases and Insect Pests if you want to double-check that your boxwoods are indeed free from pests and disease.