Yellow leaves on Sweet Pea plants

The leaves are turning yellow and falling off at the bottom. The top of the vine seems healthy. Is there anything that can be done to save the sweet pea plants?…

Struggling to grow sweet peas (Lathyrus) here in TO

Hello, I have been struggling to grow sweet peas (Lathyrus) here in TO over the last 10 years ? because of our summer heat. Is it hopeless to keep on trying? If not please advise me on what varieties to…