Brace yourselves, butterfly gardeners: climate change is turning up the heat in the butterfly garden.
Not only do higher temperatures rule, but resilience and adaptability will be required for successful pollinator gardens in the coming years.
Surely you’ve noticed: Wacky weather, erratic extremes, traditional first and last frost dates that are routinely inaccurate. As James Barilla wrote in the New York Times last week, “This past winter was a tough one in our backyard…. One week I’m sweating, the bees are buzzing, buds are breaking; the next, the birdbath is frozen and there’s snow on the ground.”
The crazy vacillations in daily temperatures make the usual gardening choices and chores more challenging. When it’s freezing one day, brazen sun and high temps the next, what’s a butterfly gardener to do? And if you’re feeling confused, imagine how birds, bees and butterflies are coping—not to mention the plants that sustain them.
I suggest we all keep an open mind. Adaptability is key. For example, let’s not be doctrinaire about native plants. Of course natives are preferred, but with changing range expansions and longer growing seasons, what does native really mean?
According to the National Arboretum, a native plant is one that was present at the time Europeans arrived in North America–that is, around Columbus’s arrival in 1492. I prefer the definition of the The Lady Bird Johnson Wildflower Center’s Mr. Smarty Plants, who defines natives like this:
“It is actually pretty simple…to define a native plant as … a plant that occurs naturally in the place where it evolved.”
That makes sense. But I also agree with Mr. Barilla’s pragmatic approach to the garden. “It doesn’t makes sense to think in terms of native and nonnative when the local weather vacillates so abruptly. A resilient garden is a diverse garden.”
My views on Tropical milkweed, Monarch butterflies favorite host plant, native to Mexico, are well-known. Some scientists will claim that the easy-to-grow orange bloomer encourages disease and its adoption will wipe out native milkweeds. I disagree. Besides, that train has left the station since Tropical Milkweed is the only Asclepias species widely available commercially.
No one says we have to choose between Tropical and native milkweeds. Do both. While you’re struggling to get those natives established, Tropical milkweed can hold down the fort since it consistently delivers. Not only is it a reliable host plant for Monarch butterflies, but all butterflies flock to its bright blossoms for nectar. And many scientists believe that it’s the plant on which Monarch butterflies evolved.
With my stretch of the world considered part of planting Zone 9A as of January 2012 (the same zone as coastal cities Corpus Christi and Houston) we’re not that far from “tropical,” anyway. This year, however, much of my Asclepias curassavica froze beyond recovery in the harsh winter and didn’t come back. Good thing it’s easy to propagate from seed and I have a private stash. I have replanted.
Perhaps we should look to the butterflies themselves for inspiration. One endangered species, the Quino Checkerspot, Euphydryas editha quino, found in Mexico and southern California, shifted to higher altitudes and switched its host plant to an entirely different species of its own volition. Scientists were expecting the species to become extinct, but somehow it quickly adapted, according to research presented at the Butterfly Conservation’s seventh international symposium in April.
Meanwhile, we learned recently that professional and amateur butterfly breeders have also had luck feeding Monarch butterfly caterpillars pumpkin, butternut squash, even cucumbers in their fifth and final instar. This news came at a good time this spring when a brutal winter and late spring made milkweeds unavailable, just as Monarchs began their migration. While I received at least one email from a scientist chastising me for celebrating this news, taking it as a challenge to native milkweeds, my feeling is we should celebrate the fact that Monarchs appear to be more adaptable than we thought.
Unpredictable weather will likely be the new normal for some time. As the third National Climate Assessment report suggests, Texas will continue to face severe shortages of ground and surface water. Floods caused by extreme rain events will interrupt the ongoing drought. Tornadoes, thunderstorms, hurricanes, and winter storms will occur with increasing frequency. Oh, and the wildfires will continue.
Science tells us this is a period of rapid climate change like no other. The plants, insects and gardeners that can adapt, will survive, and with luck, thrive.
Like what you’re reading? Follow butterfly and native plant news at the Texas Butterfly Ranch. Sign up for email delivery, like us on Facebook, or follow us on Twitter, @monikam.
- Milkweed Shortage Sparks “Alternative Fuels” for Monarch Butterflies
- Texas Butterfly Ranch Milkweed Guide
- Will the Monarch Migration Become Extinct?
- How to Get Native Milkweed Seeds to Germinate
- Persnickety Texas milkweeds, May Not Lend Themselves to Mass Production
- Tropical Milkweed: To Plant it or Not is No Simple Question
- Desperately seeking Milkweed: Be sure to buy pesticide free plants
- Butterfly FAQ: Is it OK to Move a Chrysalis? Yes, and here’s how to do it
- How to Make Seedballs
- Converting your Lawn to a Butterfly Garden
The article makes alarming sounding predictions that are not backed up by actual weather history data. Example: article says: “…suggests Texas will continue to face severe shortages of ground and surface water.” But the actual rainfall history data for Texas http://imagizer.imageshack.us/a/img845/5412/esdn.jpg
and San Antonio http://imagizer.imageshack.us/a/img842/9931/ojv31.jpg
shows the climate is trending wetter. Also shows that the recent drought was similar in severity to previous droughts. Graphs generated from: http://www.ncdc.noaa.gov/cag/
Read the climate change report.
Well said, Monika!
The Antelope Horns are really making an appearance around my farm in north Texas this spring. Sadly, I haven’t seen too many butterflies though.
Having lived for nearly 8 yrs at Lake Chapala, 30 mi south of Guadalajara Mexico; we enjoyed raising
butterflies. My wife being a Master Gardner, she would pick nectar plants for our compound, when butterflies would visit the plants. I would take pictures of the butterfly and then identify them. This led to
the knowledge of the host plant for them to lay the
eggs on. Our main staple of plants: nectar, pentas, lantana Host : Milkweed, Passion vine-Blue Crown, dill, fennel, parsley.
We would raise a hundred thousand butterflies per year. It was wonderful. We are now in an apartment
and have the beginnings of a butterfly garden in large
plastic type wine barrels. This the second time I have
read your blog.. Nice work !!!
Thank you for the kind words. 100k- that a lot of butterflies.
I kind of wish I had some tropical milkweed in one of my planters this year. I do have some native varieties but they hadn’t started growing yet when the monarchs passed through Austin. Assuming they did pass through … I didn’t see any this year. =(
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