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Review of New York Botanical Garden Premiere Lecture in 12th Annual Winter Lecture Series

Larry Weaner
Breaking the Rules: 
Ecological Design for the Real World
New York Botanical Garden (NYBG)
A few years ago, NYBG started a new trend as part of its
successful winter lecture series.
To borrow a baseball metaphor, they bring in a switch
hitter, prior to the featured speaker. 
It’s like the audience warm-up to the main show except when it’s not.
In the beginning, audience members just didn’t like the
Garden cutting into their time. After all, these are subscription tickets and
people want what they paid for.
The brief intros were more like commercial announcements, as
in what’s coming up at the Garden/don’t miss this or that exhibit…
Over time, I think the warm ups have yielded more substance,
offering more of a coming attraction kind of lucky-strike extra. 
I’m not saying there aren’t some attendees who still text
one another during the preview talk wishing it would end, but I do think the
quality of the bonus talk has earned a few stars. 
The Garden should own up to the new format though, as part
of its truth in advertising, rather than just popping it in or seeming to
“sneak” it in.  Especially if they
stand behind the commitment and quality of the talk – after all, the Garden
possesses world-class plant experts in many fields who can add to the dialectic
between science and environmentalism and sustainability and plant science.
Todd Forrest, vice president of Horticulture, Living
Collections, NYBG provided the preview.
Todd is an informed, confident professional, who can also
communicate complex earth science paradigms and triage the worlds of
horticulture, garden art and botany so that the narrative is compelling and
sometimes, downright funny.
Fittingly, Forrest talked about the issues of history,
preservation, and sustainability surrounding the Garden’s old growth
forest. 
This is a man born to his calling.
He impressed upon the audience how the 50-acre hemlock grove
is a “changing forest” rather than a preserved, pristine place that is more of
an archived attraction. 
NYBG took possession of the forest in 1895 – in the spirit
of the Hudson River school and in the context of expansion and a retort to the
city’s rapid industrialization.  

The rest of the Garden was, in fact, built around the
forest.  

Forrest used nostalgic images, government surveys from more
than a hundred years ago, through to today’s Garden and volunteer staff to
demonstrate how the forest has been studied and documented.  The baseline was established by the WPA
in the Depression to create a statistical picture of the oak, hemlock and cork
trees there; 17% was re-mapped about five years ago.
The Garden tracked the history of the forest’s soil
composition, its chestnut blight, theft of the native jack-in-the-pulpits, and
the exuberant bird watchers who inadvertently contribute to soil compaction
when they go off-trail.  
He pointed out the fact that the squirrel population is now
off the charts—used to be 2-7 per hectare. Now it’s 45-51!
Then, there are all the invasive species the Garden has to
deal with and manage.  Exotic
species alone are up 92% since 1984.
Gardeners are hopeful people though.  And true to form, Forrest outlined
solutions that have proven effective in managing the forest, including
identifying and removing the invasives: knotweed, ranunculus, Japanese
honeysuckle, and cork trees, for example. Beat the squirrels to the hickory and
oak nuts, and nurture good herbaceous plants like ferns.  This tedious, dedicated work has yielded
results and made a difference, according to Forrest.
Forrest soon introduced Larry Weaner with a funny anecdote,
before noting what an innovative landscape designer Larry is — how blown away
he is his by Larry’s sophisticated sense of horticultural style and his respect
for the processes. http://www.lweanerdesign.com/
Breaking The Rules – Featured Speaker
Larry thanked Todd for laying the foundation for his own
talk about ecological design and succession: both natural and man-made.
Plus Larry noted how much of Todd’s presentation was in
fact, a primer for his message. And he was right.
Larry launched his presentation showing the once fashionable
“Meadow in a Can” marketing ploy, asking for a show of hands of those who tried
this garden slight-of-hand. 
His point was that this attempt took advantage of our
collective conceit to make a happy, carefree meadow. 
What were we thinking? 
Well, for starters, we were romantic and loved those billowy
blossoms swaying in that random, dreamy dance.  What did we know of habitat?
Like a born-again preacher administering to a receptive,
converted flock, Larry seemed to give us group absolution, saying, “It was
purely cheap seed.” Adding, “Invariably it was going to fail. There was no
connection to the real world.”
And just like that, the dream evaporated. Pouf.

Turns out, producing a meadow is just as intense as a making
a successful perennial border. 

But this little cautionary tale established the foundation
for Larry’s message and brought us to understand how his ability to break the
rules made him a leader of ecological horticulture.
And how we can all follow his example to the promised land
of less invasives, less lawn, if we can just think about understanding the
ecological processes and habitat.
In the handout, he asks, “Why break the rules?” The answer:
Because considering ecological science changes everything.
A key element we learned is that of a competitive
environment
.  Here the idea is matching habitat to conditions that will
sustain the plant species. 
Larry urged us to think about plant communities — where plants associate with their preferred
evolutionary buddies.  Think
diversity here.  Monocultures
cannot sustain themselves.

Instead, stability is found in companion planting.  

Plus, different plants need different pollinators who
recognize their native species.

Disturbance is huge he tells us.  There is disturbance to avoid and disturbance to apply. Who
knew?

Disturbance occurs
naturally or by man and it highlights the life chapters of a plant.  

For example, if a tree falls in the
woods there opens up more light there so that the cardinalis plant, for
example, that has been “slumbering” will now germinate and grow where
heretofore it had been kept like a Sleeping Beauty, awaiting its prince
charming.   

Plants adapt.  
Using a Mike Tyson analogy to describe
a fair fight he urged us to prepare for the planting conditions we face.  Gardeners tend to be too hopeful at
times…

Within plant communities, change is a desired aesthetic.
Work with it. He recommends four plants per square foot will be overgrown
except for natives where this metric will inhibit weeds.
Natural succession
is management vs. maintenance to allow for change.  We don’t want death. Gardeners are about beauty and life.
But Larry reminds us that plants do die. 
Plan for it.   

Also
plan for plant compositions that change over time such as rudbeckia – or
Black-Eyed Susan – that is a bi-annual. 
It’s a process of succession of layers and tie in seed mix waiting to
unfold. Plants grow at different rates, even in those meadows.  

Traditional Practices
might be advantageous.  Choose
plants that match plants to habitat and community when designing a garden.  The competitive level is big so be mindful
when selecting cultivars.   
Larry used a coreopsis as an example.  A recent coreopsis introduction is rosea pink that is not a
native species – it’s a wetland plant and would not do well in a traditional
dry planting bed we are accustomed to for a coreopsis.  

He also showed examples where no irrigation was needed when
the soil Ph is correct; no staking needed for plants that were densely
planted or vertically layered.  

Design a garden by editing during the management phase.
When planting think about these priorities:
Soil preparation,

No tilling – avoid disturbing the layers

Imported topsoil vs. native soil
Be mindful of the soil amendments and organic material
Alter planting times. 
Allow time between distribution of seed and pollination, waiting for
weeds to germinate. During that time, he advises, the plant will have exhausted
the weeds.

He also preached the common sense wisdom to select the
season best for the plants over the weeds.  This methodology will also decrease watering needs.  Larry used the example of planting
Mediterranean plants that require little water that were planted in late
June/July thereby recreating or mimicking their native habitat and better
insuring a healthy start.  This is
in contrast to conventional wisdom, which is to plant in the spring – or autumn
– and give the plants lots of water. 
Something to think about…  

Research your regional Ecotypes and plan accordingly.

And look to what he terms Restoration Nurseries.  Most
every other type of nursery has a single goal:  get the plant material out the door. Too often the plants
don’t have a strong root system. 
They promote leaves at the top of the plant.  But those scrawny, spindly plants are in fact, destined to
be healthier in the long run, he told us.

Larry employs a curious way to tamp out weeds:  Timed mowing.  
Mowing seasonally cuts off invasives, forms dense cover and weeds fade
out, Larry says.  It takes about
five years to see results for this more human landscape.  “It’s sophisticated but not difficult
to do,” he adds.  He showed how he
did this with his own birch line with native spirea manipulating the tree-shrub
composition and
Migrating the Mow Line so that he can modify the sinewy path out to where he would prefer it
– closer to a meadow.

He recommends cutting perennials in the spring not the fall.

Don’t use raw wood chips because they will alter late stage
succession plants.  Pea gravel
often allows birdseed “deposits.” 
Instead, replace traditional mulches with highly competitive ground
layer vegetation.   

It was a lot of information – all terrific and in many ways
it was learning to break some long held rules or assumptions.  Larry Weaner needs to produce a book
about his out of the garden bed theories and evolved landscape design
practices.  He says his goal is
native plant dominance in the seed bank. 

Hip, hip, hooray! 
I, for one, plan to be a loyal follower and card-carrying member of the
Larry Weaner Ecological Design fan club.  

Larry concluded his talk with a beautiful piece of music
that he said inspired him and that he hoped would help convey the experience of
being in the
landscapes.   

It was a “Partnership of Nature.”  As a Hayden string quartet played, and breathtaking images
lit up the screen, it was a few moments that underscored his sense of awe with
nature. I cried…
Next up is Doug Tallamy, Thursday, February 16, 2012 at
10:00 am to discuss the use of native plants and the importance of insects in
the garden, local food web and ecosystems. For more information and to
register:
  

2 Comments

  • Ha! You are too sweet. I do take manic notes 🙂 I am passionate about sharing all the great information from these knowledge leaders that I am so fortunate to be exposed to at lectures & events for gardens & food & drink & landscapes… Nothing will replace being there, of course, but I am so lucky to learn from them – and hope the readers do too. Thank you so much for your informed feedback. Wowsy!

  • Either you have an incredible memory or take excellent notes!
    For us readers, it's a win-win situation and I thank you for the treasured info!

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 I adore plants. Plants are my muse ~ they are my paramour… I’m a garden artist; a nature lover, & horticulturist. I’m an author & writer. My passion for culture & beauty, along with my trait curiosity, brings you an authentic celebration of life. I’m a storyteller ~ weaving the artful gifts of horticulture, garden design, tablescape decor, floral design, cocktail culture, garden-to-glass recipes & their glamorous garnishes, homegrown edibles, food & drink; & cooking, to bring you my flair & what I’ve been told is an avid elan ~ as well as the stories from those who inspire me ~ to pursue an elegant, enduring, & joyful, entertaining lifestyle. It’s an honor & a privilege to do what you love.

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