what is this that suddenly appeared on my hemlock

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it was having a brilliant year so far, lush full green growth everywhere. i did some pinching and now it's getting this all of sudden. i sanitize my tools with alcohol so i dont think it could be from the pinching??

i hit it with lime sulfur and cut off some of the worst parts 😒😒😒
 

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it was having a brilliant year so far, lush full green growth everywhere. i did some pinching and now it's getting this all of sudden. i sanitize my tools with alcohol so i dont think it could be from the pinching??

i hit it with lime sulfur and cut off some of the worst parts 😒😒😒
Leaf scorch from the current heat event. Provide some shade if possible and mist your Hemlocks during the hot weather if possible.
Would not recommend Lime sulphur for Hemlock treatment, just as an aside!
 
Leaf scorch from the current heat event. Provide some shade if possible and mist your Hemlocks during the hot weather if possible.
hmm it's only getting direct sun a few hours per day. but you are probably right.

well now i feel like an idiot for putting lime sulfur on it. i thought it was some sort of disease developing.
 
Leaf scorch from the current heat event. Provide some shade if possible and mist your Hemlocks during the hot weather if possible.
Would not recommend Lime sulphur for Hemlock treatment, just as an aside!
what is the reason not to use it?
 
hmm it's only getting direct sun a few hours per day. but you are probably right.

well now i feel like an idiot for putting lime sulfur on it. i thought it was some sort of disease developing.
The temperatures that we have experienced over the past week or so are quite a bit above normal and the Hemlock have new fresh foliage. Combined with the wind and drying effect that is the most likely cause. My mountain Hemlock have been under 50% shade cloth for several weeks now. They were starting to show stress on the sunny side by mid may! Noticed it when rotating the trees. Their natural habitat are higher elevation cooler sites with morning mist or fog. Will do best in more protected sites at lower elevation and prefer cooler temperatures. Not usually that warm in higher elevations above 4,000 feet. Do not be afraid to mist them and their pots on hot days. Just some extra tips.
 
Comcur, our Mtn Hemlocks are always in at least half shade.

When the weather heated up suddenly the trees were put in 3/4 shade. Have seen a couple Mountain Hemlocks kept in the sun that were severely damaged. One was a splendid bonsai that was many years old.

Best
DSD sends
 
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