I recently purchased 2 mexican flame vines. They were shipped wet in newspaper in a box. I planted them in a sunny part of the yard. The temperature spiked from the 70's when I planted them to the high 90's in two weeks. I used vitamin b1 when I planted them & I have kept them moist. They are both getting new growth, however, as soon as the leaves are opened up they turn purple and dry up. I placed temporary shade over them since they are in full sun 2 days ago. No change. Any suggestions?
