Blue Porterweed - Stachytarpheta cayennensis Salad Tree If temperatures reach below zero

If temperatures reach below zero

Without the fruit

this variety is self-fertile

Also called Oregon Prolific and St

Blue Porterweed - Stachytarpheta cayennensis Salad Tree If temperatures reach below zeroThere are more than 60 species of Porterweed (Stachytarpheta), low growing annual herbs that attract butterflies. Because of its prominent blue flowers, the Stachytarpheta cayennensis is our favorite variety. The flowers typically wilt after a day. Fertilize twice a year to encourage continual blooming and cut back occasionally to prompt new growth. Average mature height: 3 to 6 feet Light: Full to part sun Soil: Any. Keep moist during droughts.