I start both of them indoors under lights about eight weeks before last frost in my area, following package directions. It takes time to come to flowering stage.

cardinal vines are usually easy to grow. make sure you want them where you plant them as they reseed themselves like crazy. the fence where I have them is covered & they just show here & there around the garden. be patient as they are late comers. just about the time you've given up on them they appear. the only moonflowers I've grown are daturas, a completely different plant so I can't comment on that one.

Hi rober49, Thank you for your response. I actually meant Lobeila (Cardinal Flower). Any thoughts? Thanks! Chey

can't comment on that either, sorry.