Plumeria cold protection

Q: We have a purple-flowering plumeria which resides on our sunny deck during the warm months and then Winter vacations on our back porch where we can close the plastic film windows and where it stays above 50 degrees (overnite) until it can get moved outside again. We live in zone 8+ in South Carolina and I would love to plant it outside. Do you think if we ghost-covered it when alerted that we would have an overnite freeze, that it would survive being planted in the ground and recover to flower when warm? I don't believe the soil in our yard has ever frozen below the top 1/2 inch or so, and never for more than a few hours at a time. What do you think?

A: Plumerias are tropical plants, which means, they need frost-free environment. Even if the ground is frozen only on "the top ½" or so" - this may be enough to kill the plant. From our experience, plumerias can withstand a few hours of windchill frost (not frozen soil), but even if they survive, they may get some branches damage, and recovery may take so long that the plant may not even bloom the next year. So I wouldn't take that risk even with a ghost-cover cold protection. We have customers who grow tropical plants in the ground in colder areas, but they have greenhouse protection: this means, the soil is warm and the air temperature is maintained above 45-50F. For example, this Greenhouse in Virginia.

We recommend to continue growing your rare plumeria in container and move it inside when temperatures drop below 50F (recommended) and for sure when they drop below freezing. Plumeria can take a cold night (a few hours of upper 30's) as long as it is followed by a nice warm sunny afternoon with at least upper 50s. Otherwise, keep it indoors. The good news is, since plumerias are deciduous and have no leaves in winter, low light level won't affect the plant.
Just make sure to minimize watering and keep the plant on a dry side until it starts growing new leaves in Spring. You may continue fertilizing once a week with half-doze of Sunshine boosters - Sunshine TotalFeed. This will maintain the plant healthy and prepare for the blooming season in Spring.

Hardy Dwarf Red Jade Vine

by Onika Amell, tropical plant specialist

Q: I simply adore Jade vines. I think they are the Queens of all the vines! I have been very been successful growing the green Strongylodon macrobotrys and purple Jade Mucuna pruriens vines here in Clewiston Florida but I am struggling to make the Red Jade vine (Mucuna benettii) thrive. It keeps dying on me during cold snaps. Any suggestions?

A: ...Here is our solution for you. Consider growing a Dwarf Red Jade Vine or Camptosema grandiflora. It is closely related to the regular and ultra tropical Red Jade Vine Mucuna benettii but much tougher and hardier. It is considered to be one of the more cold hardy of the Jade Vines...
This gorgeous, rare and unusual vine is a sheer showstopper. It is easy to grow and it will reward you with long fiery chains of dangling orange-red flowers that bloom from late fall to early spring. Even though it is listed as a dwarf do not be fooled. This vine will get quite large and will need a strong support over time. The flowers are long and heavy and will show best when planted on an arbor or pergola where they are able to hang down and wow you and your visitors. It puts on a wonderful display. Butterflies, bees and hummingbirds will all thank you for growing this stunner!...

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