These two Clematis are the same cultivar growing in my landscape about 15 feet apart. Both are growing on a fence facing north. Compare the leaves of the two:
Normal, happy Clematis
Not-so-happy or -normal Clematis
What do you think is causing the leaf discoloration? Very large hint: this is not a biotic stressor. Another hint: you’ve seen this part of our landscape before…back in March. For full credit, identify both direct and indirect environmental stress (in other words,  what is directly causing the discoloration in the leaves, and what is allowing  to occur, thereby causing stress indirectly)?
Answers on Monday – have a happy 4th of July.!