I plant morning glories every year in containers to climb up the walls of my terrace, but this year am having a lot of trouble with them. When buying the seeds, I saw sweet peas as well, and decided to give them a shot, and unlike the morning glories, they're doing great so far - I planted them later than the morning glories (less than 2 weeks ago), and every seed has sprouted and they look very healthy. I'm wondering if I should be planting more sweet peas, and how they compare with morning glories in a number of areas:
- How fast do they grow, compared to morning glories? The number one priority is height/volume.
- How does their coverage compare? Will they "branch out" as much as morning glories? ~6 morning glories in a rectangular 36" planter fully covered a 6' x 10' section of wall - would the vines from the sweet peas do the same?
- Do I need to care for them any differently? I have read that they like colder temperatures. Is a New York summer too hot for them?
- When (as in time of day) do they bloom? One frustration with morning glories is that the flowers are only out in the mornings, and at night when I'm actually there they are gone or shriveled up. I've never had any luck with moonflowers. Will the sweet pea flowers be open at night?
Thanks - I have had a hard time finding answers to these by googling, and the photos seem to be focused on the flowers and not the vines.