Bougainvillea

Bougainvilleas are wonderful because they look their best when they are abused.. These South American natives bloom the most when they are hot, underwatered, and their roots are constricted--which is why around here it is best to keep them in containers. They can be trained as just about anything from groundcover, to shrub, to tree (If they are properly supported), to climbing vine. Woohoo! My kind of plant.

They are pretty thorny, though, so make sure your hands and arms are properly protected when you handle them.

Bougainvillea "La Jolla". Photo Source: Desert-Tropicals.com

I recently got a "Sundown" and a "San Diego Red" (a.k.a. "La Jolla"). Both are pretty, but with the weather cooling down, it's time to think about protecting them.

For the time being, during the last two cold nights we have had, I have put them under a kind of temporary lean-to shelter against the house on my back porch, involving a frost cloth purchased at my local nursery and plenty of duct tape. While this kept my more tender plants about 10 degrees warmer than the open air, it will become impractical in the middle of winter, and as there is no room in my garage, I have had to look for other options. This means, of course that I have been spending a lot of time with Google.

From what I have seen, the universal bottom line is don't let them freeze. They sometimes die back or go dormant during colder months, but usually bounce back later if their roots are properly protected.

Phil and Jean Hovey recommend sheltering them fron any temperatures below 40 degrees, hence the little makeshift lean-to mentioned above. This Southeast Texas gardening website recommends protecting them from temps 50 degrees or below. Some people suggest leaving them in the garage or in the house one freezing temperatures begin, and only watering them once per month, before returning them to the outdoors after all danger of frost is past. Greenhouses can be handy too. I plan to keep mine in a temporary pop-out greenhouse, once I get my hands on one.

As they are only hardy to zones 9-11, plants in colder regions need to be especially well protected.


I couldn't possibly cover everything in a single blog post, so here, then, are some bougainvillea links for your perusal.

Plant Profiles:
Floridata
Wikipedia


General Care Tips:
Southeast Texas Gardening: Growing Bougainvillea
PlantAnswers.com
Texas A&M Plant Answers
Plant-Care.com

Search: Pruning Jasmine

Someone was looking for info on pruning jasmine, so I'll offer my two cents, for what they're worth.

The star jasmine I have growing in my garden has a tendency to twine itself around my trees, if left alone long enough (about 2-3 weeks) during its summer and fall growing season. The pruning process usually involves 3 basic steps:

1. Get hedge clippers
2. Chop off what I don't want.
3. Dispose of clippings.

Given our generally warm climate, whatever I cut off grows back fairly quickly. This vine is evergreen thorughout the winter, so in my region it requires no winter pruning. In fact, the above process I have described and an occasional treatment for powdery mildew is pretty much the only work I put into this plant at all. I mostly ignore it the rest of the time, except in spring when I admire the beauty of its flowers.

Lantana?

According to commenters more experienced than I, this is another possible identification for the irritating (literally) plant that I posted about before.

Here is a photo and description of Lantana at Floridata.com.

Judging by the picture and description, it seems very likely that what I have is probably a dwarf variety.

A quick Google search reveals that Lantana is known to cause contact dermatitis in sensitive individuals.

Apparently, Lantana can also put you in a coma if you ingest them. That's what the Houston Garden Book says, anyway. Fortunately, the leaves are so rough, and the odor of cut and damaged plants is such that I can't imagine anyone thinking they are edible. They don't exactly strike me as being the ideal salad green.

Verbena? (or Not...)

Apparently this plant can cause contact dermatitis in people with sensitive skin.

At first, I had this confused with verbena, but commenters quickly corrected me there. :)



In any case, the rough edges of those leaves can create skin irritation. I found this out while reaching through a this plant to remove a rather difficult weed. Then I looked it up on the internet, and found out that both lantana and verbena are indeed known to cause skin irritation in some people.

Here's a lovely shot of my arm.

The picture is a little blurry, so the irritation does not show up very well, but I was starting to get a really nice rash all over the inside of my forearm from reaching through the plant to get at a very obnoxious weed. It itched like crazy, but most of it went away in a few hours (it helped that I washed the area after the irritation began), and it is nearly all gone now, just over 24 hours later. And the discomfort was nothing like what I had later the same day, when my big toe had a run in with some angry fire ants.

I am now searching for alternative low-growing shrubby ground cover type things to replace it. Preferably something that doesn't need heavy pruning every winter. More on that as I learn what might work, and what won't.

Hmm.


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Update: Dermatitis from this plant can last longer than 24 hours, despite oral antihistamines and repeated applications of hydrocortisone cream. The rash is still there. I touched the plant on Monday. It is now Thursday. Grrr. Sleeves are highly recommended.