Posted by Mike g on August 20, 2002 at 10:58:32:
In Reply to: Arborvitae Leaves Turning Black posted by Steve on August 16, 2002 at 19:47:38:
Steve, That's perfectly normal for the arborvitae. The black leaf is caused by a fungus that spreads due to the leaves packed together, moisture builds up while air doesn't get into the area and that's why the leaf appears black. Also, the inside turning brown is nothing to be worried about, just brush out the dead leaves with your hands. This is only how the plant grows, if the brown/black growth appears from outside and seems to overwhelm a side (or total) of the arborvitae, then only is a problem present.
: I planted a 6ft Emerald Gold Arborvitae two months ago and it has been doing pretty well all along.
: Just recently I've noticed that some of the lower leaves have turned black. When I looked inside the bush, near the trunk, I noticed quite a bit of brown/dead foliage (not sure the two problems are related.) I water the shrub routinely.
: Any idea what's causing the black leaves? I didn't see any insects or worms anywhere.