Charles from United States writes,
What is the best treatment for my Blue Spruce which has developed Rhizosphaera Needle Cast?
The bottom of the Spruce is thinning out due to browning dead needles and has moved up about a third of the tree.
The only product that we do carry that does not say it cannot be used on blue spruce for needlecast is the Clearys Spectro. Please be aware that just because it the product can still bleach the trees which is the problem with most products when using on blue spruce.
Answer last updated on: 04/22/2015