Garden Pests and Diseases: Vine is dying, 2 by khabbab

khabbab wrote:
Hi,

This is cobaea scandens in bad shape right now. I sowed the seeds in october, transplanted in soil bed in november and it grew to about 3 feet. As our summers are very very hot (40-45C continuous), this vine gets only 3 hours direct sun in morning.

1-All leaves are getting brown crispy edges and then shrivel and die. no wilting what so ever.
2- Vine is getting bald from the bottom and then going up. The only stem from the trunk is not green but brown and very dry.

I could not find any pest. Can some one tell me how i can save this vine? There is new growth on it but not enough.

Thanks
Khabbab