Good aggressives, bad invasives

April 10th, 2014 Posted in Uncategorized

First, update on freeze report. Before you shovel out that “dead” plant, hang on a bit, since we’re getting lots of surprises like chile tepin/pequin.

chile tepin emerge after freeze austin texas

Birds spread the wealth, but it’s a bonus for all in part shade.

chile pequin austin texas

Lady Banks didn’t let me down after all.

lady banks flowers after hard freeze Texas

Bulb parade: late Dutch iris is a bonus! Here with native heartleaf skullcap reaching for the sky. That heartleaf will be all over the place next year. Good!

dutch iris lavender with native plant heartleaf skullcap

12° plus  drought didn’t offend my yearling native Salvia roemeriana.

salvia roemeriana native perennial

Yes, some people consider native salvias “invasive,” too, but they’re actually considered “aggressive” if they find the right spot. It’s all in your perspective. I say: the more the merrier to attract wildlife.

Some gardeners even yelp about “invasive” bluebonnets and California poppies. Well, everyone’s entitled to their opinion! These are certainly prettier in this front yard than lawn, that’s for sure.

bluebonnets california poppies front yard instead of lawn

Native pink evening primrose walks over everything in its path, but attracts so many beneficial insects.

bee on pink evening primrose

It’s a kick for me to see how they’ve moved around my garden to find their happy spot in sun: here where I took out grass.

pink evening primrose replaces lawn

Native baby blue eyes (Nemophila menziesii) finds its happy spot in part shade. I lose it in spots that get too much shade, but it moves itself!

bee on native baby blue eyes annual

native baby blue eyes with pink oxalis for bees

What a lovely combination with columbine.

native columbine with baby blue eyes part shade garden

Quite a surprise to find native prickly poppy growing in this east Austin garden! Usually you see them in fields.

native white prickly poppy

prickly poppy with cow central texas wildflowers

So why do we run for the shovel when milk thistle settles in our garden? I like the variegated foliage all winter. This year, I got a bee bonus, too.

milk thistle flower central texas

As gardeners, if exuberant plants take over, we can thin to pass along to friends who hanker for them. But when invasive species like ligustrum take over, it can take an army of volunteers to eradicate them from natural areas where they smother wildlife habitat diversity. Animals can’t live by ligustrums alone!

invasive ligustrum berries

This week, Jessica Wilson from the City of Austin Watershed Protection Department joins Tom to swap invasives for much more appealing native plants that do the same job. For example, native cherry laurel instead of ligustrum.

Tom Spencer and Jessica Wilson Central Texas Gardener

My house came with many on her list, like Japanese honeysuckle and ligustrums. We cut down our ligustrums for a mountain laurel hedge (from seed, no less) to hide a chain link fence. I planted crossvine to hide the fence until the mountain laurels grew up. Now we have a solid hedge and the crossvine is still there, even though it gets no extra water from me. I’ll tame it off the mountain laurels (along with passion vine), don’t worry.

crossvine in mountain laurel hedge

Jessica picks options for elephant ears, nandina, vitex and devilish catclaw vine.

invasive catclaw vine

Find out more about invasive plants.

In case you missed it last year, Daphne explains why it doesn’t really take 100 years for a century plant to bloom.

At Mayfield Park, these yuccas are sending out their flowers. But they’re not dying; just losing their leaves as they trunk up.

yucca blooms Mayfield Park austin texas

Along with dumping invasives, the best thing I did for my garden in clay and even “red death sandy loam” was to pile on leaves, compost (some bought, some made) and mulch. Over time, there are spots where I can dig with my hands.

Any compost is good, but this week William Glenn from Garden-Ville compares the options, including biosolids.

compare compost Garden-Ville on Central Texas Gardener

On tour, Laura and Andy Stewart worked with David Mahler of Environmental Survey Consulting to rescue their in-town hillside from invasive invasion.

hillside habitat restoration austin texas

Now, treasures like rock penstemon can breathe again.

rock penstemon hillside habitat restoration austin texas

Miró Rivera Architects beautifully melded their house design into the hillside in a total indoor/outdoor experience.

Miró Rivera Architects hillside home austin texas

rebar patio cover Miró Rivera Architects hillside home austin texas

Take the tour now!

Thanks for stopping by. See you next week as we preview the Master Gardener tour. Linda

  1. 8 Responses to “Good aggressives, bad invasives”

  2. By Deena O'Daniel on Apr 10, 2014

    Thanks for the great info and photos! I’m glad to see that California Poppy will grow here – I picked up some seeds last time I was out there. Should I wait till fall to plant them?


    Linda reply on April 11th, 2014 4:20 pm:

    Yes, Deena, hang onto those seeds until early November. If they’re kept cool and dry in the house, they’ll be fine. I often buy seeds on sale as they expire because they’re still good!


  3. By Merrideth Jiles on Apr 10, 2014

    Couldn’t agree more about some Natives being aggressive. 3 years later and I am still pulling Eve’s Necklace (Sophora affinis) seedlings from all over the garden. Just being Native doesn’t make it right for your garden and there are good, non-native plants that are perfect fits.


    Linda reply on April 11th, 2014 4:20 pm:

    How interesting, Merrideth! I’ve had viewers come after me about aggressive yaupon holly and even columbines!


  4. By Tina on Apr 11, 2014

    I have to chuckle at your comments about “invasive” natives. I recently removed some Berkley sedge because I am finding seedlings everywhere and I’ve decided that, since it’s not native, I’m not tolerant of its spread. That’s not true of spiderwort, heart-leaf skullcap, lyre-leaf sage, etc. I guess it’s all about perspective–I’m willing to tolerate the natives spreading themselves all over than non-natives. Love that prickly poppy, btw!


    Linda reply on April 11th, 2014 4:19 pm:

    It is all about the perspective, Tina, like with that prickly poppy! I didn’t realize that Berkley wasn’t actually native since it’s been touted as such. But it’s still a great lawn replacement! Yahoo for fun with plants!


  5. By Mike Mecke on Apr 11, 2014

    Another great post Linda – thanks. I agree with most of your “aggressives” except the thistles and prickly poppy – they can just take over a pasture, pretty flowers for sure, but little else. Often indicate an abused piece of land. Oh did you see this email posting today going around: “Looks like our state flower has hybridized into maroon and white and loves Austin and UT campus. Beautiful sight! Isn’t nature wonderful?

    Some hybridization of our bluebonnets into maroon. Really are pretty, more choices. thanks.


    Linda reply on April 11th, 2014 4:16 pm:

    Hi, Mike! I forgot to mention that prickly poppies and other wildflowers indicate over-grazed sites! Maroon bluebonnets are actually a hybrid! Either they got a wrong seed packet or some Aggies snuck in at night!


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